byte) but nor does it guarantee
+ that all operations will work in such cases.
+
+ This delegates most behavior to the
+
+ Most applications will never need to create their own instances of this type;
+ instead, use the static
+ Public Sub InsertRow(myConnectionString As String)
+ " If the connection string is null, use a default.
+ If myConnectionString = "" Then
+ myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass"
+ End If
+ Dim myConnection As New MySqlConnection(myConnectionString)
+ Dim myInsertQuery As String = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)"
+ Dim myCommand As New MySqlCommand(myInsertQuery)
+ myCommand.Connection = myConnection
+ myConnection.Open()
+ myCommand.ExecuteNonQuery()
+ myCommand.Connection.Close()
+ End Sub
+
+
+ public void InsertRow(string myConnectionString)
+ {
+ // If the connection string is null, use a default.
+ if(myConnectionString == "")
+ {
+ myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass";
+ }
+ MySqlConnection myConnection = new MySqlConnection(myConnectionString);
+ string myInsertQuery = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)";
+ MySqlCommand myCommand = new MySqlCommand(myInsertQuery);
+ myCommand.Connection = myConnection;
+ myConnection.Open();
+ myCommand.ExecuteNonQuery();
+ myCommand.Connection.Close();
+ }
+
+
+ Public Sub CreateMySqlCommand()
+ Dim myConnection As New MySqlConnection _
+ ("Persist Security Info=False;database=test;server=myServer")
+ myConnection.Open()
+ Dim myTrans As MySqlTransaction = myConnection.BeginTransaction()
+ Dim mySelectQuery As String = "SELECT * FROM MyTable"
+ Dim myCommand As New MySqlCommand(mySelectQuery, myConnection, myTrans)
+ myCommand.CommandTimeout = 20
+ End Sub
+
+
+ public void CreateMySqlCommand()
+ {
+ MySqlConnection myConnection = new MySqlConnection("Persist Security Info=False;
+ database=test;server=myServer");
+ myConnection.Open();
+ MySqlTransaction myTrans = myConnection.BeginTransaction();
+ string mySelectQuery = "SELECT * FROM myTable";
+ MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection,myTrans);
+ myCommand.CommandTimeout = 20;
+ }
+
+
+ public:
+ void CreateMySqlCommand()
+ {
+ MySqlConnection* myConnection = new MySqlConnection(S"Persist Security Info=False;
+ database=test;server=myServer");
+ myConnection->Open();
+ MySqlTransaction* myTrans = myConnection->BeginTransaction();
+ String* mySelectQuery = S"SELECT * FROM myTable";
+ MySqlCommand* myCommand = new MySqlCommand(mySelectQuery, myConnection, myTrans);
+ myCommand->CommandTimeout = 20;
+ };
+
+
+ Public Sub CreateMySqlCommand()
+ Dim myCommand As New MySqlCommand()
+ myCommand.CommandType = CommandType.Text
+ End Sub
+
+
+ public void CreateMySqlCommand()
+ {
+ MySqlCommand myCommand = new MySqlCommand();
+ myCommand.CommandType = CommandType.Text;
+ }
+
+
+ Public Sub CreateMySqlCommand()
+ Dim sql as String = "SELECT * FROM mytable"
+ Dim myCommand As New MySqlCommand(sql)
+ myCommand.CommandType = CommandType.Text
+ End Sub
+
+
+ public void CreateMySqlCommand()
+ {
+ string sql = "SELECT * FROM mytable";
+ MySqlCommand myCommand = new MySqlCommand(sql);
+ myCommand.CommandType = CommandType.Text;
+ }
+
+
+ Public Sub CreateMySqlCommand()
+ Dim conn as new MySqlConnection("server=myServer")
+ Dim sql as String = "SELECT * FROM mytable"
+ Dim myCommand As New MySqlCommand(sql, conn)
+ myCommand.CommandType = CommandType.Text
+ End Sub
+
+
+ public void CreateMySqlCommand()
+ {
+ MySqlConnection conn = new MySqlConnection("server=myserver")
+ string sql = "SELECT * FROM mytable";
+ MySqlCommand myCommand = new MySqlCommand(sql, conn);
+ myCommand.CommandType = CommandType.Text;
+ }
+
+
+ Public Sub CreateMySqlCommand()
+ Dim conn as new MySqlConnection("server=myServer")
+ conn.Open();
+ Dim txn as MySqlTransaction = conn.BeginTransaction()
+ Dim sql as String = "SELECT * FROM mytable"
+ Dim myCommand As New MySqlCommand(sql, conn, txn)
+ myCommand.CommandType = CommandType.Text
+ End Sub
+
+
+ public void CreateMySqlCommand()
+ {
+ MySqlConnection conn = new MySqlConnection("server=myserver")
+ conn.Open();
+ MySqlTransaction txn = conn.BeginTransaction();
+ string sql = "SELECT * FROM mytable";
+ MySqlCommand myCommand = new MySqlCommand(sql, conn, txn);
+ myCommand.CommandType = CommandType.Text;
+ }
+
+
+ Public Sub CreateMySqlCommand()
+ Dim myCommand As New MySqlCommand()
+ myCommand.CommandText = "SELECT * FROM Mytable ORDER BY id"
+ myCommand.CommandType = CommandType.Text
+ End Sub
+
+
+ public void CreateMySqlCommand()
+ {
+ MySqlCommand myCommand = new MySqlCommand();
+ myCommand.CommandText = "SELECT * FROM mytable ORDER BY id";
+ myCommand.CommandType = CommandType.Text;
+ }
+
+
+ Public Sub CreateMySqlCommand()
+ Dim myCommand As New MySqlCommand()
+ myCommand.CommandType = CommandType.Text
+ End Sub
+
+
+ public void CreateMySqlCommand()
+ {
+ MySqlCommand myCommand = new MySqlCommand();
+ myCommand.CommandType = CommandType.Text;
+ }
+
+
+ Public Sub CreateMySqlCommand()
+ Dim mySelectQuery As String = "SELECT * FROM mytable ORDER BY id"
+ Dim myConnectString As String = "Persist Security Info=False;database=test;server=myServer"
+ Dim myCommand As New MySqlCommand(mySelectQuery)
+ myCommand.Connection = New MySqlConnection(myConnectString)
+ myCommand.CommandType = CommandType.Text
+ End Sub
+
+
+ public void CreateMySqlCommand()
+ {
+ string mySelectQuery = "SELECT * FROM mytable ORDER BY id";
+ string myConnectString = "Persist Security Info=False;database=test;server=myServer";
+ MySqlCommand myCommand = new MySqlCommand(mySelectQuery);
+ myCommand.Connection = new MySqlConnection(myConnectString);
+ myCommand.CommandType = CommandType.Text;
+ }
+
+
+ Public Sub CreateMySqlCommand(myConnection As MySqlConnection, _
+ mySelectQuery As String, myParamArray() As MySqlParameter)
+ Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
+ myCommand.CommandText = "SELECT id, name FROM mytable WHERE age=@age"
+ myCommand.UpdatedRowSource = UpdateRowSource.Both
+ myCommand.Parameters.Add(myParamArray)
+ Dim j As Integer
+ For j = 0 To myCommand.Parameters.Count - 1
+ myCommand.Parameters.Add(myParamArray(j))
+ Next j
+ Dim myMessage As String = ""
+ Dim i As Integer
+ For i = 0 To myCommand.Parameters.Count - 1
+ myMessage += myCommand.Parameters(i).ToString() & ControlChars.Cr
+ Next i
+ Console.WriteLine(myMessage)
+ End Sub
+
+
+ public void CreateMySqlCommand(MySqlConnection myConnection, string mySelectQuery,
+ MySqlParameter[] myParamArray)
+ {
+ MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection);
+ myCommand.CommandText = "SELECT id, name FROM mytable WHERE age=@age";
+ myCommand.Parameters.Add(myParamArray);
+ for (int j=0; j<myParamArray.Length; j++)
+ {
+ myCommand.Parameters.Add(myParamArray[j]) ;
+ }
+ string myMessage = "";
+ for (int i = 0; i < myCommand.Parameters.Count; i++)
+ {
+ myMessage += myCommand.Parameters[i].ToString() + "\n";
+ }
+ MessageBox.Show(myMessage);
+ }
+
+
+ Public Sub CreateMySqlCommand(myExecuteQuery As String, myConnection As MySqlConnection)
+ Dim myCommand As New MySqlCommand(myExecuteQuery, myConnection)
+ myCommand.Connection.Open()
+ myCommand.ExecuteNonQuery()
+ myConnection.Close()
+ End Sub
+
+
+ public void CreateMySqlCommand(string myExecuteQuery, MySqlConnection myConnection)
+ {
+ MySqlCommand myCommand = new MySqlCommand(myExecuteQuery, myConnection);
+ myCommand.Connection.Open();
+ myCommand.ExecuteNonQuery();
+ myConnection.Close();
+ }
+
+
+ Public Sub CreateMySqlDataReader(mySelectQuery As String, myConnection As MySqlConnection)
+ Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
+ myConnection.Open()
+ Dim myReader As MySqlDataReader
+ myReader = myCommand.ExecuteReader()
+ Try
+ While myReader.Read()
+ Console.WriteLine(myReader.GetString(0))
+ End While
+ Finally
+ myReader.Close
+ myConnection.Close
+ End Try
+ End Sub
+
+
+ public void CreateMySqlDataReader(string mySelectQuery, MySqlConnection myConnection)
+ {
+ MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection);
+ myConnection.Open();
+ MMySqlDataReader myReader;
+ myReader = myCommand.ExecuteReader();
+ try
+ {
+ while(myReader.Read())
+ {
+ Console.WriteLine(myReader.GetString(0));
+ }
+ }
+ finally
+ {
+ myReader.Close();
+ myConnection.Close();
+ }
+ }
+
+
+ Public Sub CreateMySqlCommand(myScalarQuery As String, myConnection As MySqlConnection)
+ Dim myCommand As New MySqlCommand(myScalarQuery, myConnection)
+ myCommand.Connection.Open()
+ myCommand.ExecuteScalar()
+ myConnection.Close()
+ End Sub
+
+
+ public void CreateMySqlCommand(string myScalarQuery, MySqlConnection myConnection)
+ {
+ MySqlCommand myCommand = new MySqlCommand(myScalarQuery, myConnection);
+ myCommand.Connection.Open();
+ myCommand.ExecuteScalar();
+ myConnection.Close();
+ }
+
+
+ public:
+ void CreateMySqlCommand(String* myScalarQuery, MySqlConnection* myConnection)
+ {
+ MySqlCommand* myCommand = new MySqlCommand(myScalarQuery, myConnection);
+ myCommand->Connection->Open();
+ myCommand->ExecuteScalar();
+ myConnection->Close();
+ }
+
+
+
+ public sub PrepareExample()
+ Dim cmd as New MySqlCommand("INSERT INTO mytable VALUES (@val)", myConnection)
+ cmd.Parameters.Add( "@val", 10 )
+ cmd.Prepare()
+ cmd.ExecuteNonQuery()
+
+ cmd.Parameters(0).Value = 20
+ cmd.ExecuteNonQuery()
+ end sub
+
+
+ private void PrepareExample()
+ {
+ MySqlCommand cmd = new MySqlCommand("INSERT INTO mytable VALUES (@val)", myConnection);
+ cmd.Parameters.Add( "@val", 10 );
+ cmd.Prepare();
+ cmd.ExecuteNonQuery();
+
+ cmd.Parameters[0].Value = 20;
+ cmd.ExecuteNonQuery();
+ }
+
+
+
+ Public Sub InsertRow(myConnectionString As String)
+ ' If the connection string is null, use a default.
+ If myConnectionString = "" Then
+ myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass"
+ End If
+ Dim myConnection As New MySqlConnection(myConnectionString)
+ Dim myInsertQuery As String = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)"
+ Dim myCommand As New MySqlCommand(myInsertQuery)
+ myCommand.Connection = myConnection
+ myConnection.Open()
+ myCommand.ExecuteNonQuery()
+ myCommand.Connection.Close()
+ End Sub
+
+
+
+
+ public void InsertRow(string myConnectionString)
+ {
+ // If the connection string is null, use a default.
+ if(myConnectionString == "")
+ {
+ myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass";
+ }
+ MySqlConnection myConnection = new MySqlConnection(myConnectionString);
+ string myInsertQuery = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)";
+ MySqlCommand myCommand = new MySqlCommand(myInsertQuery);
+ myCommand.Connection = myConnection;
+ myConnection.Open();
+ myCommand.ExecuteNonQuery();
+ myCommand.Connection.Close();
+ }
+
+
+
+ Public Sub CreateSqlConnection()
+ Dim myConnection As New MySqlConnection()
+ myConnection.ConnectionString = "Persist Security Info=False;Username=user;Password=pass;database=test1;server=localhost;Connect Timeout=30"
+ myConnection.Open()
+ End Sub
+
+
+ public void CreateSqlConnection()
+ {
+ MySqlConnection myConnection = new MySqlConnection();
+ myConnection.ConnectionString = "Persist Security Info=False;Username=user;Password=pass;database=test1;server=localhost;Connect Timeout=30";
+ myConnection.Open();
+ }
+
+
+ Public Sub CreateMySqlConnection()
+ Dim myConnString As String = _
+ "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass"
+ Dim myConnection As New MySqlConnection( myConnString )
+ myConnection.Open()
+ MessageBox.Show( "Server Version: " + myConnection.ServerVersion _
+ + ControlChars.NewLine + "Database: " + myConnection.Database )
+ myConnection.ChangeDatabase( "test2" )
+ MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion _
+ + ControlChars.NewLine + "Database: " + myConnection.Database )
+ myConnection.Close()
+ End Sub
+
+
+
+ public void CreateMySqlConnection()
+ {
+ string myConnString =
+ "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass";
+ MySqlConnection myConnection = new MySqlConnection( myConnString );
+ myConnection.Open();
+ MessageBox.Show( "Server Version: " + myConnection.ServerVersion
+ + "\nDatabase: " + myConnection.Database );
+ myConnection.ChangeDatabase( "test2" );
+ MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion
+ + "\nDatabase: " + myConnection.Database );
+ myConnection.Close();
+ }
+
+
+ Public Sub CreateMySqlConnection(myConnString As String)
+ Dim myConnection As New MySqlConnection(myConnString)
+ myConnection.Open()
+ MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
+ + ControlChars.Cr + "State: " + myConnection.State.ToString())
+ myConnection.Close()
+ End Sub
+
+
+ public void CreateMySqlConnection(string myConnString)
+ {
+ MySqlConnection myConnection = new MySqlConnection(myConnString);
+ myConnection.Open();
+ MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
+ "\nState: " + myConnection.State.ToString());
+ myConnection.Close();
+ }
+
+
+ Public Sub CreateMySqlConnection(myConnString As String)
+ Dim myConnection As New MySqlConnection(myConnString)
+ myConnection.Open()
+ MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
+ + ControlChars.Cr + "State: " + myConnection.State.ToString())
+ myConnection.Close()
+ End Sub
+
+
+ public void CreateMySqlConnection(string myConnString)
+ {
+ MySqlConnection myConnection = new MySqlConnection(myConnString);
+ myConnection.Open();
+ MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
+ "\nState: " + myConnection.State.ToString());
+ myConnection.Close();
+ }
+
+ | Name | +Default | +Description | +
|---|---|---|
|
+ Connect Timeout |
+ 15 | ++ The length of time (in seconds) to wait for a connection to the server before + terminating the attempt and generating an error. + | +
|
+ Host |
+ localhost | +
+ |
+
| Port | +3306 | ++ The port MySQL is using to listen for connections. This value is ignored if the connection protocol + is anything but socket. + | +
| Protocol | +socket | +
+ Specifies the type of connection to make to the server. + pipe for a named pipe connection + unix for a Unix socket connection + memory to use MySQL shared memory + |
+
|
+ CharSet |
+ + | + Specifies the character set that should be used to encode all queries sent to the server. + Resultsets are still returned in the character set of the data returned. + | +
| Logging | +false | +When true, various pieces of information is output to any configured TraceListeners. | +
| Allow Batch | +true | +
+ When true, multiple SQL statements can be sent with one command execution. + -Note- + Starting with MySQL 4.1.1, batch statements should be separated by the server-defined seperator character. + Commands sent to earlier versions of MySQL should be seperated with ';'. + |
+
| Encrypt | +false | ++ When true, SSL/TLS encryption is used for all data sent between the + client and server if the server has a certificate installed. Recognized values + are true, false, yes, and no. + | +
|
+ Initial Catalog |
+ mysql | +The name of the database to use intially | +
|
+ Password |
+ + | The password for the MySQL account being used. | +
| Persist Security Info | +false | ++ When set to false or no (strongly recommended), security-sensitive + information, such as the password, is not returned as part of the connection if + the connection is open or has ever been in an open state. Resetting the + connection string resets all connection string values including the password. + Recognized values are true, false, yes, and no. + | +
|
+ User Id |
+ + | The MySQL login account being used. | +
| Shared Memory Name | +MYSQL | +The name of the shared memory object to use for communication if the connection protocol is set to memory. | +
| Allow Zero Datetime | +false | ++ True to have MySqlDataReader.GetValue() return a MySqlDateTime for date or datetime columns that have illegal values. + False will cause a DateTime object to be returned for legal values and an exception will be thrown for illegal values. + | +
| Convert Zero Datetime | +false | ++ True to have MySqlDataReader.GetValue() and MySqlDataReader.GetDateTime() + return DateTime.MinValue for date or datetime columns that have illegal values. + | +
|
+ Pipe Name |
+ mysql | +
+ When set to the name of a named pipe, the MySqlConnection will attempt to connect to MySQL
+ on that named pipe. This settings only applies to the Windows platform. + |
+
|
+ Use Performance Monitor |
+ false | ++ Posts performance data that can be tracked using perfmon + | +
| + Procedure Cache Size + | +25 | ++ How many stored procedure definitions can be held in the cache + | +
| + Ignore Prepare + | +true | ++ Instructs the provider to ignore any attempts to prepare commands. This option + was added to allow a user to disable prepared statements in an entire application + without modifying the code. A user might want to do this if errors or bugs are + encountered with MySQL prepared statements. + | +
| Use Procedure Bodies | +true | ++ Instructs the provider to attempt to call the procedure without first resolving the metadata. This + is useful in situations where the calling user does not have access to the mysql.proc table. To + use this mode, the parameters for the procedure must be added to the command in the same order + as they appear in the procedure definition and their types must be explicitly set. + | +
| Auto Enlist | +true | ++ Indicates whether the connection should automatically enlist in the current transaction, + if there is one. + | +
| Respect Binary Flags | +true | ++ Indicates whether the connection should respect all binary flags sent to the client + as part of column metadata. False will cause the connector to behave like + Connector/NET 5.0 and earlier. + | +
| BlobAsUTF8IncludePattern | +null | ++ Pattern that should be used to indicate which blob columns should be treated as UTF-8. + | +
| BlobAsUTF8ExcludePattern | +null | ++ Pattern that should be used to indicate which blob columns should not be treated as UTF-8. + | +
| Default Command Timeout | +30 | ++ The default timeout that new MySqlCommand objects will use unless changed. + | +
| Allow User Variables | +false | ++ Should the provider expect user variables in the SQL. + | +
| Interactive -or- Interactive Session | +false | ++ Should this session be considered interactive? + | +
| Functions Return String | +false | ++ Set this option to true to force the return value of SQL functions to be string. + | +
| Use Affected Rows | +false | ++ Set this option to true to cause the affected rows reported to reflect only the + rows that are actually changed. By default, the number of rows that are matched + is returned. + | +
| Name | +Default | +Description | +
|---|---|---|
| Connection Lifetime | +0 | +
+ When a connection is returned to the pool, its creation time is compared with
+ the current time, and the connection is destroyed if that time span (in seconds)
+ exceeds the value specified by Connection Lifetime. This is useful in
+ clustered configurations to force load balancing between a running server and a
+ server just brought online.
+ |
+
| Max Pool Size | +100 | +The maximum number of connections allowed in the pool. | +
| Min Pool Size | +0 | +The minimum number of connections allowed in the pool. | +
| Pooling | +true | ++ When true, the MySqlConnection object is drawn from the appropriate + pool, or if necessary, is created and added to the appropriate pool. Recognized + values are true, false, yes, and no. + | +
| Connection Reset | +false | ++ Specifies whether the database connection should be reset when being + drawn from the pool. Leaving this as false will yeild much faster + connection opens but the user should understand the side effects + of doing this such as temporary tables and user variables from the previous + session not being cleared out. + | +
| Cache Server Properties | +false | ++ Specifies whether the server variables are cached between pooled connections. + On systems where the variables change infrequently and there are lots of + connection attempts, this can speed up things dramatically. + | +
+ Public Sub CreateConnection()
+ Dim myConnection As New MySqlConnection()
+ myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass"
+ myConnection.Open()
+ End Sub 'CreateConnection
+
+
+ public void CreateConnection()
+ {
+ MySqlConnection myConnection = new MySqlConnection();
+ myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass";
+ myConnection.Open();
+ }
+
+
+ Public Sub CreateConnection()
+ Dim myConnection As New MySqlConnection()
+ myConnection.ConnectionString = "database=myDB;server=/var/lib/mysql/mysql.sock;user id=myUser; pwd=myPass"
+ myConnection.Open()
+ End Sub 'CreateConnection
+
+
+ public void CreateConnection()
+ {
+ MySqlConnection myConnection = new MySqlConnection();
+ myConnection.ConnectionString = "database=myDB;server=/var/lib/mysql/mysql.sock;user id=myUser; pwd=myPass";
+ myConnection.Open();
+ }
+
+
+ Public Sub RunTransaction(myConnString As String)
+ Dim myConnection As New MySqlConnection(myConnString)
+ myConnection.Open()
+
+ Dim myCommand As MySqlCommand = myConnection.CreateCommand()
+ Dim myTrans As MySqlTransaction
+
+ ' Start a local transaction
+ myTrans = myConnection.BeginTransaction()
+ ' Must assign both transaction object and connection
+ ' to Command object for a pending local transaction
+ myCommand.Connection = myConnection
+ myCommand.Transaction = myTrans
+
+ Try
+ myCommand.CommandText = "Insert into Test (id, desc) VALUES (100, 'Description')"
+ myCommand.ExecuteNonQuery()
+ myCommand.CommandText = "Insert into Test (id, desc) VALUES (101, 'Description')"
+ myCommand.ExecuteNonQuery()
+ myTrans.Commit()
+ Console.WriteLine("Both records are written to database.")
+ Catch e As Exception
+ Try
+ myTrans.Rollback()
+ Catch ex As MySqlException
+ If Not myTrans.Connection Is Nothing Then
+ Console.WriteLine("An exception of type " + ex.GetType().ToString() + _
+ " was encountered while attempting to roll back the transaction.")
+ End If
+ End Try
+
+ Console.WriteLine("An exception of type " + e.GetType().ToString() + _
+ "was encountered while inserting the data.")
+ Console.WriteLine("Neither record was written to database.")
+ Finally
+ myConnection.Close()
+ End Try
+ End Sub
+
+
+ public void RunTransaction(string myConnString)
+ {
+ MySqlConnection myConnection = new MySqlConnection(myConnString);
+ myConnection.Open();
+
+ MySqlCommand myCommand = myConnection.CreateCommand();
+ MySqlTransaction myTrans;
+
+ // Start a local transaction
+ myTrans = myConnection.BeginTransaction();
+ // Must assign both transaction object and connection
+ // to Command object for a pending local transaction
+ myCommand.Connection = myConnection;
+ myCommand.Transaction = myTrans;
+
+ try
+ {
+ myCommand.CommandText = "insert into Test (id, desc) VALUES (100, 'Description')";
+ myCommand.ExecuteNonQuery();
+ myCommand.CommandText = "insert into Test (id, desc) VALUES (101, 'Description')";
+ myCommand.ExecuteNonQuery();
+ myTrans.Commit();
+ Console.WriteLine("Both records are written to database.");
+ }
+ catch(Exception e)
+ {
+ try
+ {
+ myTrans.Rollback();
+ }
+ catch (SqlException ex)
+ {
+ if (myTrans.Connection != null)
+ {
+ Console.WriteLine("An exception of type " + ex.GetType() +
+ " was encountered while attempting to roll back the transaction.");
+ }
+ }
+
+ Console.WriteLine("An exception of type " + e.GetType() +
+ " was encountered while inserting the data.");
+ Console.WriteLine("Neither record was written to database.");
+ }
+ finally
+ {
+ myConnection.Close();
+ }
+ }
+
+
+ Public Sub RunTransaction(myConnString As String)
+ Dim myConnection As New MySqlConnection(myConnString)
+ myConnection.Open()
+
+ Dim myCommand As MySqlCommand = myConnection.CreateCommand()
+ Dim myTrans As MySqlTransaction
+
+ ' Start a local transaction
+ myTrans = myConnection.BeginTransaction()
+ ' Must assign both transaction object and connection
+ ' to Command object for a pending local transaction
+ myCommand.Connection = myConnection
+ myCommand.Transaction = myTrans
+
+ Try
+ myCommand.CommandText = "Insert into Test (id, desc) VALUES (100, 'Description')"
+ myCommand.ExecuteNonQuery()
+ myCommand.CommandText = "Insert into Test (id, desc) VALUES (101, 'Description')"
+ myCommand.ExecuteNonQuery()
+ myTrans.Commit()
+ Console.WriteLine("Both records are written to database.")
+ Catch e As Exception
+ Try
+ myTrans.Rollback()
+ Catch ex As MySqlException
+ If Not myTrans.Connection Is Nothing Then
+ Console.WriteLine("An exception of type " + ex.GetType().ToString() + _
+ " was encountered while attempting to roll back the transaction.")
+ End If
+ End Try
+
+ Console.WriteLine("An exception of type " + e.GetType().ToString() + _
+ "was encountered while inserting the data.")
+ Console.WriteLine("Neither record was written to database.")
+ Finally
+ myConnection.Close()
+ End Try
+ End Sub
+
+
+ public void RunTransaction(string myConnString)
+ {
+ MySqlConnection myConnection = new MySqlConnection(myConnString);
+ myConnection.Open();
+
+ MySqlCommand myCommand = myConnection.CreateCommand();
+ MySqlTransaction myTrans;
+
+ // Start a local transaction
+ myTrans = myConnection.BeginTransaction();
+ // Must assign both transaction object and connection
+ // to Command object for a pending local transaction
+ myCommand.Connection = myConnection;
+ myCommand.Transaction = myTrans;
+
+ try
+ {
+ myCommand.CommandText = "insert into Test (id, desc) VALUES (100, 'Description')";
+ myCommand.ExecuteNonQuery();
+ myCommand.CommandText = "insert into Test (id, desc) VALUES (101, 'Description')";
+ myCommand.ExecuteNonQuery();
+ myTrans.Commit();
+ Console.WriteLine("Both records are written to database.");
+ }
+ catch(Exception e)
+ {
+ try
+ {
+ myTrans.Rollback();
+ }
+ catch (SqlException ex)
+ {
+ if (myTrans.Connection != null)
+ {
+ Console.WriteLine("An exception of type " + ex.GetType() +
+ " was encountered while attempting to roll back the transaction.");
+ }
+ }
+
+ Console.WriteLine("An exception of type " + e.GetType() +
+ " was encountered while inserting the data.");
+ Console.WriteLine("Neither record was written to database.");
+ }
+ finally
+ {
+ myConnection.Close();
+ }
+ }
+
+
+ Public Sub CreateMySqlConnection()
+ Dim myConnString As String = _
+ "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass"
+ Dim myConnection As New MySqlConnection( myConnString )
+ myConnection.Open()
+ MessageBox.Show( "Server Version: " + myConnection.ServerVersion _
+ + ControlChars.NewLine + "Database: " + myConnection.Database )
+ myConnection.ChangeDatabase( "test2" )
+ MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion _
+ + ControlChars.NewLine + "Database: " + myConnection.Database )
+ myConnection.Close()
+ End Sub
+
+
+
+ public void CreateMySqlConnection()
+ {
+ string myConnString =
+ "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass";
+ MySqlConnection myConnection = new MySqlConnection( myConnString );
+ myConnection.Open();
+ MessageBox.Show( "Server Version: " + myConnection.ServerVersion
+ + "\nDatabase: " + myConnection.Database );
+ myConnection.ChangeDatabase( "test2" );
+ MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion
+ + "\nDatabase: " + myConnection.Database );
+ myConnection.Close();
+ }
+
+
+ Public Sub CreateMySqlConnection(myConnString As String)
+ Dim myConnection As New MySqlConnection(myConnString)
+ myConnection.Open()
+ MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
+ + ControlChars.Cr + "State: " + myConnection.State.ToString())
+ myConnection.Close()
+ End Sub
+
+
+ public void CreateMySqlConnection(string myConnString)
+ {
+ MySqlConnection myConnection = new MySqlConnection(myConnString);
+ myConnection.Open();
+ MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
+ "\nState: " + myConnection.State.ToString());
+ myConnection.Close();
+ }
+
+
+ Public Sub CreateMySqlConnection(myConnString As String)
+ Dim myConnection As New MySqlConnection(myConnString)
+ myConnection.Open()
+ MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
+ + ControlChars.Cr + "State: " + myConnection.State.ToString())
+ myConnection.Close()
+ End Sub
+
+
+ public void CreateMySqlConnection(string myConnString)
+ {
+ MySqlConnection myConnection = new MySqlConnection(myConnString);
+ myConnection.Open();
+ MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
+ "\nState: " + myConnection.State.ToString());
+ myConnection.Close();
+ }
+
+
+ Public Sub ReadMyData(myConnString As String)
+ Dim mySelectQuery As String = "SELECT OrderID, CustomerID FROM Orders"
+ Dim myConnection As New MySqlConnection(myConnString)
+ Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
+ myConnection.Open()
+ Dim myReader As MySqlDataReader
+ myReader = myCommand.ExecuteReader()
+ ' Always call Read before accessing data.
+ While myReader.Read()
+ Console.WriteLine((myReader.GetInt32(0) & ", " & myReader.GetString(1)))
+ End While
+ ' always call Close when done reading.
+ myReader.Close()
+ ' Close the connection when done with it.
+ myConnection.Close()
+ End Sub 'ReadMyData
+
+
+ public void ReadMyData(string myConnString) {
+ string mySelectQuery = "SELECT OrderID, CustomerID FROM Orders";
+ MySqlConnection myConnection = new MySqlConnection(myConnString);
+ MySqlCommand myCommand = new MySqlCommand(mySelectQuery,myConnection);
+ myConnection.Open();
+ MySqlDataReader myReader;
+ myReader = myCommand.ExecuteReader();
+ // Always call Read before accessing data.
+ while (myReader.Read()) {
+ Console.WriteLine(myReader.GetInt32(0) + ", " + myReader.GetString(1));
+ }
+ // always call Close when done reading.
+ myReader.Close();
+ // Close the connection when done with it.
+ myConnection.Close();
+ }
+
+
+ Public Sub ShowException()
+ Dim mySelectQuery As String = "SELECT column1 FROM table1"
+ Dim myConnection As New MySqlConnection ("Data Source=localhost;Database=Sample;")
+ Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
+
+ Try
+ myCommand.Connection.Open()
+ Catch e As MySqlException
+ MessageBox.Show( e.Message )
+ End Try
+ End Sub
+
+
+ public void ShowException()
+ {
+ string mySelectQuery = "SELECT column1 FROM table1";
+ MySqlConnection myConnection =
+ new MySqlConnection("Data Source=localhost;Database=Sample;");
+ MySqlCommand myCommand = new MySqlCommand(mySelectQuery,myConnection);
+
+ try
+ {
+ myCommand.Connection.Open();
+ }
+ catch (MySqlException e)
+ {
+ MessageBox.Show( e.Message );
+ }
+ }
+
+
+ Public Shared Function SelectRows(myConnection As String, mySelectQuery As String, myTableName As String) As DataSet
+ Dim myConn As New MySqlConnection(myConnection)
+ Dim myDataAdapter As New MySqlDataAdapter()
+ myDataAdapter.SelectCommand = New MySqlCommand(mySelectQuery, myConn)
+ Dim cb As SqlCommandBuilder = New MySqlCommandBuilder(myDataAdapter)
+
+ myConn.Open()
+
+ Dim ds As DataSet = New DataSet
+ myDataAdapter.Fill(ds, myTableName)
+
+ ' Code to modify data in DataSet here
+
+ ' Without the MySqlCommandBuilder this line would fail.
+ myDataAdapter.Update(ds, myTableName)
+
+ myConn.Close()
+ End Function 'SelectRows
+
+
+ public static DataSet SelectRows(string myConnection, string mySelectQuery, string myTableName)
+ {
+ MySqlConnection myConn = new MySqlConnection(myConnection);
+ MySqlDataAdapter myDataAdapter = new MySqlDataAdapter();
+ myDataAdapter.SelectCommand = new MySqlCommand(mySelectQuery, myConn);
+ MySqlCommandBuilder cb = new MySqlCommandBuilder(myDataAdapter);
+
+ myConn.Open();
+
+ DataSet ds = new DataSet();
+ myDataAdapter.Fill(ds, myTableName);
+
+ //code to modify data in DataSet here
+
+ //Without the MySqlCommandBuilder this line would fail
+ myDataAdapter.Update(ds, myTableName);
+
+ myConn.Close();
+
+ return ds;
+ }
+
+
+
+ Public Function SelectRows(dataSet As DataSet, connection As String, query As String) As DataSet
+ Dim conn As New MySqlConnection(connection)
+ Dim adapter As New MySqlDataAdapter()
+ adapter.SelectCommand = new MySqlCommand(query, conn)
+ adapter.Fill(dataset)
+ Return dataset
+ End Function
+
+
+ public DataSet SelectRows(DataSet dataset,string connection,string query)
+ {
+ MySqlConnection conn = new MySqlConnection(connection);
+ MySqlDataAdapter adapter = new MySqlDataAdapter();
+ adapter.SelectCommand = new MySqlCommand(query, conn);
+ adapter.Fill(dataset);
+ return dataset;
+ }
+
+
+ Public Sub CreateSqlDataAdapter()
+ Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
+ "database=test")
+ Dim da As MySqlDataAdapter = New MySqlDataAdapter
+ da.MissingSchemaAction = MissingSchemaAction.AddWithKey
+
+ da.SelectCommand = New MySqlCommand("SELECT id, name FROM mytable", conn)
+ da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
+ "VALUES (@id, @name)", conn)
+ da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
+ "WHERE id=@oldId", conn)
+ da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
+
+ da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
+ da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
+
+ da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
+ da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
+ da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
+
+ da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
+ End Sub
+
+
+ public static void CreateSqlDataAdapter()
+ {
+ MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
+ MySqlDataAdapter da = new MySqlDataAdapter();
+ da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
+
+ da.SelectCommand = new MySqlCommand("SELECT id, name FROM mytable", conn);
+ da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
+ "VALUES (@id, @name)", conn);
+ da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
+ "WHERE id=@oldId", conn);
+ da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
+
+ da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
+ da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
+
+ da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
+ da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
+ da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
+
+ da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
+ }
+
+
+ Public Sub CreateSqlDataAdapter()
+ Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
+ "database=test")
+ Dim cmd as new MySqlCommand("SELECT id, name FROM mytable", conn)
+ Dim da As MySqlDataAdapter = New MySqlDataAdapter(cmd)
+ da.MissingSchemaAction = MissingSchemaAction.AddWithKey
+
+ da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
+ "VALUES (@id, @name)", conn)
+ da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
+ "WHERE id=@oldId", conn)
+ da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
+
+ da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
+ da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
+
+ da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
+ da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
+ da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
+
+ da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
+ End Sub
+
+
+ public static void CreateSqlDataAdapter()
+ {
+ MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
+ MySqlCommand cmd = new MySqlCommand("SELECT id, name FROM mytable", conn);
+ MySqlDataAdapter da = new MySqlDataAdapter(cmd);
+ da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
+
+ da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
+ "VALUES (@id, @name)", conn);
+ da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
+ "WHERE id=@oldId", conn);
+ da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
+
+ da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
+ da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
+
+ da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
+ da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
+ da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
+
+ da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
+ }
+
+
+ Public Sub CreateSqlDataAdapter()
+ Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
+ "database=test")
+ Dim da As MySqlDataAdapter = New MySqlDataAdapter("SELECT id, name FROM mytable", conn)
+ da.MissingSchemaAction = MissingSchemaAction.AddWithKey
+
+ da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
+ "VALUES (@id, @name)", conn)
+ da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
+ "WHERE id=@oldId", conn)
+ da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
+
+ da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
+ da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
+
+ da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
+ da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
+ da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
+
+ da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
+ End Sub
+
+
+ public static void CreateSqlDataAdapter()
+ {
+ MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
+ MySqlDataAdapter da = new MySqlDataAdapter("SELECT id, name FROM mytable", conn);
+ da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
+
+ da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
+ "VALUES (@id, @name)", conn);
+ da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
+ "WHERE id=@oldId", conn);
+ da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
+
+ da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
+ da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
+
+ da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
+ da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
+ da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
+
+ da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
+ }
+
+
+ Public Sub CreateSqlDataAdapter()
+ Dim da As MySqlDataAdapter = New MySqlDataAdapter("SELECT id, name FROM mytable", "Data Source=localhost;database=test")
+ Dim conn As MySqlConnection = da.SelectCommand.Connection
+ da.MissingSchemaAction = MissingSchemaAction.AddWithKey
+
+ da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
+ "VALUES (@id, @name)", conn)
+ da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
+ "WHERE id=@oldId", conn)
+ da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
+
+ da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
+ da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
+
+ da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
+ da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
+ da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
+
+ da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
+ End Sub
+
+
+ public static void CreateSqlDataAdapter()
+ {
+ MySqlDataAdapter da = new MySqlDataAdapter("SELECT id, name FROM mytable", "Data Source=localhost;database=test");
+ MySqlConnection conn = da.SelectCommand.Connection;
+ da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
+
+ da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
+ "VALUES (@id, @name)", conn);
+ da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
+ "WHERE id=@oldId", conn);
+ da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
+
+ da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
+ da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
+
+ da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
+ da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
+ da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
+
+ da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
+ }
+
+
+ Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
+
+ Dim da As MySqlDataAdapter = New MySqlDataAdapter()
+ Dim cmd As MySqlCommand
+ Dim parm As MySqlParameter
+
+ ' Create the SelectCommand.
+ cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
+
+ cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
+ cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
+
+ da.SelectCommand = cmd
+
+ ' Create the DeleteCommand.
+ cmd = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
+
+ parm = cmd.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
+ parm.SourceVersion = DataRowVersion.Original
+
+ da.DeleteCommand = cmd
+
+ Return da
+ End Function
+
+
+ public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
+ {
+ MySqlDataAdapter da = new MySqlDataAdapter();
+ MySqlCommand cmd;
+ MySqlParameter parm;
+
+ // Create the SelectCommand.
+ cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
+
+ cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
+ cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
+
+ da.SelectCommand = cmd;
+
+ // Create the DeleteCommand.
+ cmd = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
+
+ parm = cmd.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
+ parm.SourceVersion = DataRowVersion.Original;
+
+ da.DeleteCommand = cmd;
+
+ return da;
+ }
+
+
+ Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
+
+ Dim da As MySqlDataAdapter = New MySqlDataAdapter()
+ Dim cmd As MySqlCommand
+ Dim parm As MySqlParameter
+
+ ' Create the SelectCommand.
+ cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
+
+ cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
+ cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
+
+ da.SelectCommand = cmd
+
+ ' Create the InsertCommand.
+ cmd = New MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id, @name)", conn)
+
+ cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
+ cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
+ da.InsertCommand = cmd
+
+ Return da
+ End Function
+
+
+ public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
+ {
+ MySqlDataAdapter da = new MySqlDataAdapter();
+ MySqlCommand cmd;
+ MySqlParameter parm;
+
+ // Create the SelectCommand.
+ cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
+
+ cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
+ cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
+
+ da.SelectCommand = cmd;
+
+ // Create the InsertCommand.
+ cmd = new MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id,@name)", conn);
+ cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
+ cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
+
+ da.InsertCommand = cmd;
+
+ return da;
+ }
+
+
+ Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
+
+ Dim da As MySqlDataAdapter = New MySqlDataAdapter()
+ Dim cmd As MySqlCommand
+ Dim parm As MySqlParameter
+
+ ' Create the SelectCommand.
+ cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
+
+ cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
+ cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
+
+ da.SelectCommand = cmd
+
+ ' Create the InsertCommand.
+ cmd = New MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id, @name)", conn)
+
+ cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
+ cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
+ da.InsertCommand = cmd
+
+ Return da
+ End Function
+
+
+ public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
+ {
+ MySqlDataAdapter da = new MySqlDataAdapter();
+ MySqlCommand cmd;
+ MySqlParameter parm;
+
+ // Create the SelectCommand.
+ cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
+
+ cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
+ cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
+
+ da.SelectCommand = cmd;
+
+ // Create the InsertCommand.
+ cmd = new MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id,@name)", conn);
+ cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
+ cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
+
+ da.InsertCommand = cmd;
+
+ return da;
+ }
+
+
+ Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
+
+ Dim da As MySqlDataAdapter = New MySqlDataAdapter()
+ Dim cmd As MySqlCommand
+ Dim parm As MySqlParameter
+
+ ' Create the SelectCommand.
+ cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
+
+ cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
+ cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
+
+ da.SelectCommand = cmd
+
+ ' Create the UpdateCommand.
+ cmd = New MySqlCommand("UPDATE mytable SET id=@id, name=@name WHERE id=@oldId", conn)
+
+ cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
+ cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
+
+ parm = cmd.Parameters.Add("@oldId", MySqlDbType.VarChar, 15, "id")
+ parm.SourceVersion = DataRowVersion.Original
+
+ da.UpdateCommand = cmd
+
+ Return da
+ End Function
+
+
+ public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
+ {
+ MySqlDataAdapter da = new MySqlDataAdapter();
+ MySqlCommand cmd;
+ MySqlParameter parm;
+
+ // Create the SelectCommand.
+ cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
+
+ cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
+ cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
+
+ da.SelectCommand = cmd;
+
+ // Create the UpdateCommand.
+ cmd = new MySqlCommand("UPDATE mytable SET id=@id, name=@name WHERE id=@oldId", conn);
+ cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
+ cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
+
+ parm = cmd.Parameters.Add( "@oldId", MySqlDbType.VarChar, 15, "id" );
+ parm.SourceVersion = DataRowVersion.Original;
+
+ da.UpdateCommand = cmd;
+
+ return da;
+ }
+
+
+ Public Sub AddParameters()
+ ' ...
+ ' create myDataSet and myDataAdapter
+ ' ...
+ myDataAdapter.SelectCommand.Parameters.Add("@CategoryName", MySqlDbType.VarChar, 80).Value = "toasters"
+ myDataAdapter.SelectCommand.Parameters.Add("@SerialNum", MySqlDbType.Long).Value = 239
+
+ myDataAdapter.Fill(myDataSet)
+ End Sub 'AddSqlParameters
+
+
+ public void AddSqlParameters()
+ {
+ // ...
+ // create myDataSet and myDataAdapter
+ // ...
+
+ myDataAdapter.SelectCommand.Parameters.Add("@CategoryName", MySqlDbType.VarChar, 80).Value = "toasters";
+ myDataAdapter.SelectCommand.Parameters.Add("@SerialNum", MySqlDbType.Long).Value = 239;
+ myDataAdapter.Fill(myDataSet);
+
+ }
+
+
+ Public Sub RunTransaction(myConnString As String)
+ Dim myConnection As New MySqlConnection(myConnString)
+ myConnection.Open()
+
+ Dim myCommand As MySqlCommand = myConnection.CreateCommand()
+ Dim myTrans As MySqlTransaction
+
+ ' Start a local transaction
+ myTrans = myConnection.BeginTransaction()
+ ' Must assign both transaction object and connection
+ ' to Command object for a pending local transaction
+ myCommand.Connection = myConnection
+ myCommand.Transaction = myTrans
+
+ Try
+ myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
+ myCommand.ExecuteNonQuery()
+ myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"
+ myCommand.ExecuteNonQuery()
+ myTrans.Commit()
+ Console.WriteLine("Both records are written to database.")
+ Catch e As Exception
+ Try
+ myTrans.Rollback()
+ Catch ex As MySqlException
+ If Not myTrans.Connection Is Nothing Then
+ Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
+ " was encountered while attempting to roll back the transaction.")
+ End If
+ End Try
+
+ Console.WriteLine("An exception of type " & e.GetType().ToString() & _
+ "was encountered while inserting the data.")
+ Console.WriteLine("Neither record was written to database.")
+ Finally
+ myConnection.Close()
+ End Try
+ End Sub 'RunTransaction
+
+
+ public void RunTransaction(string myConnString)
+ {
+ MySqlConnection myConnection = new MySqlConnection(myConnString);
+ myConnection.Open();
+
+ MySqlCommand myCommand = myConnection.CreateCommand();
+ MySqlTransaction myTrans;
+
+ // Start a local transaction
+ myTrans = myConnection.BeginTransaction();
+ // Must assign both transaction object and connection
+ // to Command object for a pending local transaction
+ myCommand.Connection = myConnection;
+ myCommand.Transaction = myTrans;
+
+ try
+ {
+ myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
+ myCommand.ExecuteNonQuery();
+ myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
+ myCommand.ExecuteNonQuery();
+ myTrans.Commit();
+ Console.WriteLine("Both records are written to database.");
+ }
+ catch(Exception e)
+ {
+ try
+ {
+ myTrans.Rollback();
+ }
+ catch (MySqlException ex)
+ {
+ if (myTrans.Connection != null)
+ {
+ Console.WriteLine("An exception of type " + ex.GetType() +
+ " was encountered while attempting to roll back the transaction.");
+ }
+ }
+
+ Console.WriteLine("An exception of type " + e.GetType() +
+ " was encountered while inserting the data.");
+ Console.WriteLine("Neither record was written to database.");
+ }
+ finally
+ {
+ myConnection.Close();
+ }
+ }
+
+
+ Public Sub RunSqlTransaction(myConnString As String)
+ Dim myConnection As New MySqlConnection(myConnString)
+ myConnection.Open()
+
+ Dim myCommand As MySqlCommand = myConnection.CreateCommand()
+ Dim myTrans As MySqlTransaction
+
+ ' Start a local transaction
+ myTrans = myConnection.BeginTransaction()
+
+ ' Must assign both transaction object and connection
+ ' to Command object for a pending local transaction
+ myCommand.Connection = myConnection
+ myCommand.Transaction = myTrans
+
+ Try
+ myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')"
+ myCommand.ExecuteNonQuery()
+ myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')"
+ myCommand.ExecuteNonQuery()
+ myTrans.Commit()
+ Console.WriteLine("Success.")
+ Catch e As Exception
+ Try
+ myTrans.Rollback()
+ Catch ex As MySqlException
+ If Not myTrans.Connection Is Nothing Then
+ Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
+ " was encountered while attempting to roll back the transaction.")
+ End If
+ End Try
+
+ Console.WriteLine("An exception of type " & e.GetType().ToString() & _
+ "was encountered while inserting the data.")
+ Console.WriteLine("Neither record was written to database.")
+ Finally
+ myConnection.Close()
+ End Try
+ End Sub
+
+
+ public void RunSqlTransaction(string myConnString)
+ {
+ MySqlConnection myConnection = new MySqlConnection(myConnString);
+ myConnection.Open();
+
+ MySqlCommand myCommand = myConnection.CreateCommand();
+ MySqlTransaction myTrans;
+
+ // Start a local transaction
+ myTrans = myConnection.BeginTransaction();
+ // Must assign both transaction object and connection
+ // to Command object for a pending local transaction
+ myCommand.Connection = myConnection;
+ myCommand.Transaction = myTrans;
+
+ try
+ {
+ myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')";
+ myCommand.ExecuteNonQuery();
+ myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')";
+ myCommand.ExecuteNonQuery();
+ myTrans.Commit();
+ Console.WriteLine("Both records are written to database.");
+ }
+ catch(Exception e)
+ {
+ try
+ {
+ myTrans.Rollback();
+ }
+ catch (MySqlException ex)
+ {
+ if (myTrans.Connection != null)
+ {
+ Console.WriteLine("An exception of type " + ex.GetType() +
+ " was encountered while attempting to roll back the transaction.");
+ }
+ }
+
+ Console.WriteLine("An exception of type " + e.GetType() +
+ " was encountered while inserting the data.");
+ Console.WriteLine("Neither record was written to database.");
+ }
+ finally
+ {
+ myConnection.Close();
+ }
+ }
+
+
+ Public Sub RunSqlTransaction(myConnString As String)
+ Dim myConnection As New MySqlConnection(myConnString)
+ myConnection.Open()
+
+ Dim myCommand As MySqlCommand = myConnection.CreateCommand()
+ Dim myTrans As MySqlTransaction
+
+ ' Start a local transaction
+ myTrans = myConnection.BeginTransaction()
+
+ ' Must assign both transaction object and connection
+ ' to Command object for a pending local transaction
+ myCommand.Connection = myConnection
+ myCommand.Transaction = myTrans
+
+ Try
+ myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')"
+ myCommand.ExecuteNonQuery()
+ myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')"
+ myCommand.ExecuteNonQuery()
+ myTrans.Commit()
+ Console.WriteLine("Success.")
+ Catch e As Exception
+ Try
+ myTrans.Rollback()
+ Catch ex As MySqlException
+ If Not myTrans.Connection Is Nothing Then
+ Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
+ " was encountered while attempting to roll back the transaction.")
+ End If
+ End Try
+
+ Console.WriteLine("An exception of type " & e.GetType().ToString() & _
+ "was encountered while inserting the data.")
+ Console.WriteLine("Neither record was written to database.")
+ Finally
+ myConnection.Close()
+ End Try
+ End Sub
+
+
+ public void RunSqlTransaction(string myConnString)
+ {
+ MySqlConnection myConnection = new MySqlConnection(myConnString);
+ myConnection.Open();
+
+ MySqlCommand myCommand = myConnection.CreateCommand();
+ MySqlTransaction myTrans;
+
+ // Start a local transaction
+ myTrans = myConnection.BeginTransaction();
+ // Must assign both transaction object and connection
+ // to Command object for a pending local transaction
+ myCommand.Connection = myConnection;
+ myCommand.Transaction = myTrans;
+
+ try
+ {
+ myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')";
+ myCommand.ExecuteNonQuery();
+ myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')";
+ myCommand.ExecuteNonQuery();
+ myTrans.Commit();
+ Console.WriteLine("Both records are written to database.");
+ }
+ catch(Exception e)
+ {
+ try
+ {
+ myTrans.Rollback();
+ }
+ catch (MySqlException ex)
+ {
+ if (myTrans.Connection != null)
+ {
+ Console.WriteLine("An exception of type " + ex.GetType() +
+ " was encountered while attempting to roll back the transaction.");
+ }
+ }
+
+ Console.WriteLine("An exception of type " + e.GetType() +
+ " was encountered while inserting the data.");
+ Console.WriteLine("Neither record was written to database.");
+ }
+ finally
+ {
+ myConnection.Close();
+ }
+ }
+
+
+ new { pooling = new
+ {
+ enabled = true,
+ maxSize = 15,
+ maxIdleTime = 60000,
+ queueTimeout = 60000
+ }
+ }
+
+
+ new { pooling = new
+ {
+ enabled = true,
+ maxSize = 15,
+ maxIdleTime = 60000,
+ queueTimeout = 60000
+ }
+ }
+
+
+ [JsonContainer(ItemConverterType = typeof(MyContainerConverter), ItemConverterParameters = new object[] { 123, "Four" })]
+
+
+ [JsonContainer(NamingStrategyType = typeof(MyNamingStrategy), NamingStrategyParameters = new object[] { 123, "Four" })]
+
+
+ [JsonProperty(ItemConverterType = typeof(MyContainerConverter), ItemConverterParameters = new object[] { 123, "Four" })]
+
+
+ [JsonProperty(NamingStrategyType = typeof(MyNamingStrategy), NamingStrategyParameters = new object[] { 123, "Four" })]
+
+ + This delegate is executed when a new database connection is opened that requires a password. +
+
+ The
+ Due to connection pooling this delegate is only executed when a new physical connection is opened, not when reusing a connection + that was previously opened from the pool. +
++ This can only be called when the connection is open. +
++ In case of a development or pre-release version this field will contain + the version of the next version to be released from this branch. +
+
+ When you specify an
+ When using this constructor, you must be aware of a possible misuse of the constructor which takes a
See https://www.postgresql.org/docs/current/static/rangetypes.html.
+Multirange types were introduced in PostgreSQL 14.
++ This can only be called when the connection is open. +
++ In case of a development or pre-release version this field will contain + the version of the next version to be released from this branch. +
+
+ Receives a user SQL query as passed in by the user in
+ This includes doing rewriting named parameter placeholders to positional (@p => $1), and splitting the query + up by semicolons (legacy batching, SELECT 1; SELECT 2). +
+
+ Receives a user SQL query as passed in by the user in
+ This includes doing rewriting named parameter placeholders to positional (@p => $1), and splitting the query + up by semicolons (legacy batching, SELECT 1; SELECT 2). +
++ See https://www.postgresql.org/docs/current/static/datatype-geometric.html. +
+
+ Do not use this type unless you have to: prefer
+
+ G(x) = x^4 + (a+1/a)x^3 + ax^2 + (a+1/a)x + 1 ++ where a = primitive root of field generator 0x14D + +
array at which copying begins.
+ true if the false.true if access to the false.true if the false.true if the false.null if the key does not exist.true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the collection.true if the current set is a proper subset of other; otherwise, false.true if the current set is a proper superset of other; otherwise, false.true if the current set is a subset of other; otherwise, false.true if the current set is a superset of other; otherwise, false.true if the current set and other share at least one common element; otherwise, false.true if the current set is equal to other; otherwise, false.array at which copying begins.
+ true if access to the false.true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the collection.DistributedContextPropagator.ObservableCounter{T}.Observe() is called by ObservableCounter{T}.Observe() is called by ObservableCounter{T}.Observe() is called by ObservableCounter{T}.Observe() is called by ObservableCounter{T}.Observe() is called by ObservableCounter{T}.Observe() is called by true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the collection.true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the collection.true if the instance can convert the specified object type; otherwise, false.T is compatible with typeToConvert.true if the type can be converted; otherwise, false.T is compatible with typeToConvert.true if the instance can convert the specified object type; otherwise, false.T is compatible with typeToConvert.