MySqlTransaction Class

In This Topic

Represents a SQL transaction to be made in the MySQL database.

Syntax

Visual Basic
C#

'Declaration
 
Public Class MySqlTransaction 
   Inherits Devart.Common.DbTransactionBase
   Implements System.Data.IDbTransaction, System.IDisposable

public class MySqlTransaction : Devart.Common.DbTransactionBase, System.Data.IDbTransaction, System.IDisposable

Remarks

The application creates a MySqlTransaction object by calling MySqlConnection.BeginTransaction on the MySqlConnection object. All subsequent operations associated with the transaction (for example, committing or aborting the transaction), are performed on the MySqlTransaction object.

The correlation between MySqlConnection and MySqlTransaction is always 1:1.

Transactions (local and global) are possible only with tables that are created with engine supporting transactions. In standard MySQL distribution, InnoDB engine supports transactions.

Example

The following example creates a MySqlConnection and a MySqlTransaction. It also demonstrates how to use the MySqlConnection.BeginTransaction, Commit, and Rollback methods.

csharp

public static void RunMySqlTransaction(string myConnString) {
        using (MySqlConnection myConnection = new MySqlConnection(myConnString)) {
                myConnection.Open();
                // Start a local transaction
                MySqlTransaction myTrans = myConnection.BeginTransaction(System.Data.IsolationLevel.ReadCommitted);
                MySqlCommand myCommand = myConnection.CreateCommand();
                try {
                        myCommand.CommandText = "INSERT INTO Dept(DeptNo, DName) Values(52, 'DEVELOPMENT')";
                        myCommand.ExecuteNonQuery();
                        myCommand.CommandText = "INSERT INTO Dept(DeptNo, DName) Values(62, 'PRODUCTION')";
                        myCommand.ExecuteNonQuery();
                        myTrans.Commit();
                        Console.WriteLine("Both records are written to database.");
                }
                catch (Exception e) {
                        myTrans.Rollback();
                        Console.WriteLine(e.ToString());
                        Console.WriteLine("Neither record was written to database.");
                }
                finally {
                        myCommand.Dispose();
                        myTrans.Dispose();
                }
    }
}

Visual Basic

Public Shared Sub RunMySqlTransaction(myConnString As String)
        Using myConnection As New MySqlConnection(myConnString)
                myConnection.Open()
                ' Start a local transaction
                Dim myTrans As MySqlTransaction = myConnection.BeginTransaction(System.Data.IsolationLevel.ReadCommitted)
                Dim myCommand As MySqlCommand = myConnection.CreateCommand()
                Try
                        myCommand.CommandText = "INSERT INTO Dept(DeptNo, DName) Values(52, 'DEVELOPMENT')"
                        myCommand.ExecuteNonQuery()
                        myCommand.CommandText = "INSERT INTO Dept(DeptNo, DName) Values(62, 'PRODUCTION')"
                        myCommand.ExecuteNonQuery()
                        myTrans.Commit()
                        Console.WriteLine("Both records are written to database.")
                Catch e As Exception
                        myTrans.Rollback()
                        Console.WriteLine(e.ToString())
                        Console.WriteLine("Neither record was written to database.")
                Finally
                        myCommand.Dispose()
                        myTrans.Dispose()
                End Try
    End Using
End Sub

Inheritance Hierarchy

System.Object
   System.MarshalByRefObject
      System.Data.Common.DbTransaction
         Devart.Common.DbTransactionBase
            Devart.Data.MySql.MySqlTransaction

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

MySqlTransaction Members
Devart.Data.MySql Namespace
MySqlDataReader Class
MySqlConnection Class

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