Represents a SQL transaction to be made in the database.
The following example creates a
UniConnection and a
UniTransaction. It also demonstrates how to use the
UniConnection.BeginTransaction,
Commit, and
Rollback methods.
public void RunUniTransaction(string myConnString)
{
UniConnection myConnection = new UniConnection(myConnString);
myConnection.Open();
UniCommand myCommand = new UniCommand();
UniTransaction myTrans;
// Start a local transaction
myTrans = myConnection.BeginTransaction(System.Data.IsolationLevel.ReadCommitted);
// Assign transaction object for a pending local transaction
myCommand.Transaction = myTrans;
myCommand.Connection = myConnection;
try
{
myCommand.CommandText = "INSERT INTO Test.Dept(DeptNo, DName) Values(50, 'DEVELOPMENT')";
myCommand.ExecuteNonQuery();
myCommand.CommandText = "INSERT INTO Test.Dept(DeptNo, DName) Values(60, '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
{
myConnection.Close();
}
}
Public Sub RunUniTransaction(ByVal myConnString As String)
Dim myConnection As New UniConnection(myConnString)
myConnection.Open()
Dim myCommand As New UniCommand
Dim myTrans As UniTransaction
' Start a local transaction
myTrans = myConnection.BeginTransaction(System.Data.IsolationLevel.ReadCommitted)
' Assign transaction object for a pending local transaction
myCommand.Transaction = myTrans
myCommand.Connection = myConnection
Try
myCommand.CommandText = "INSERT INTO Test.Dept(DeptNo, DName) Values(50, 'DEVELOPMENT')"
myCommand.ExecuteNonQuery()
myCommand.CommandText = "INSERT INTO Test.Dept(DeptNo, DName) Values(60, '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
myConnection.Close()
End Try
End Sub
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