SqlTransaction Class
Assembly: System.Data (in system.data.dll)
The application creates a SqlTransaction object by calling BeginTransaction on the SqlConnection object. All subsequent operations associated with the transaction (for example, committing or aborting the transaction), are performed on the SqlTransaction object.
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| Try/Catch exception handling should always be used when committing or rolling back a SqlTransaction. Both Commit and Rollback generate an InvalidOperationException if the connection is terminated or if the transaction has already been rolled back on the server. |
For more information on SQL Server transactions, see "Explicit Transactions" and "Coding Efficient Transactions" in SQL Server 2005 Books Online.
The following example creates a SqlConnection and a SqlTransaction. It also demonstrates how to use the BeginTransaction, Commit, and Rollback methods. The transaction is rolled back on any error. Try/Catch error handling is used to handle any errors when attempting to commit or roll back the transaction.
Private Sub ExecuteSqlTransaction(ByVal connectionString As String) Using connection As New SqlConnection(connectionString) connection.Open() Dim command As SqlCommand = connection.CreateCommand() Dim transaction As SqlTransaction ' Start a local transaction transaction = connection.BeginTransaction("SampleTransaction") ' Must assign both transaction object and connection ' to Command object for a pending local transaction. command.Connection = connection command.Transaction = transaction Try command.CommandText = _ "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')" command.ExecuteNonQuery() command.CommandText = _ "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')" command.ExecuteNonQuery() ' Attempt to commit the transaction. transaction.Commit() Console.WriteLine("Both records are written to database.") Catch ex As Exception Console.WriteLine("Commit Exception Type: {0", ex.GetType()) Console.WriteLine(" Message: {0", ex.Message) ' Attempt to roll back the transaction. Try transaction.Rollback() Catch ex2 As Exception ' This catch block will handle any errors that may have occurred ' on the server that would cause the rollback to fail, such as ' a closed connection. Console.WriteLine("Rollback Exception Type: {0", ex2.GetType()) Console.WriteLine(" Message: {0", ex2.Message) End Try End Try End Using End Sub
System.MarshalByRefObject
System.Data.Common.DbTransaction
System.Data.SqlClient.SqlTransaction
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
Reference
SqlTransaction MembersSystem.Data.SqlClient Namespace
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