dotConnect Universal Documentation
Devart.Data.Universal Namespace / UniConnection Class / Rollback Method
Example

In This Topic
    Rollback Method (UniConnection)
    In This Topic
    Rolls back a transaction from a pending state.
    Syntax
    'Declaration
     
    Public Sub Rollback() 
    public void Rollback()
    Example
    The following example demonstrates how to use Commit and Rollback methods.
    public void RunUniTransaction(string myConnString)
    {
      UniConnection myConnection = new UniConnection(myConnString);
      myConnection.Open();
    
      UniCommand myCommand = new UniCommand();
      myConnection.BeginTransaction();
      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();
        myConnection.Commit();
        Console.WriteLine("Both records are written to database.");
      }
      catch(Exception e)
      {
        myConnection.Rollback();
        Console.WriteLine(e.ToString());
        Console.WriteLine("Neither record was written to database.");
      }
      finally
      {
        myConnection.Close();
      }
    }
    Public Sub RunUniTransaction(myConnString As String)
      Dim myConnection As New UniConnection(myConnString)
      myConnection.Open()
    
      Dim myCommand As New UniCommand()
      myConnection.BeginTransaction()
      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()
        myConnection.Commit()
        Console.WriteLine("Both records are written to database.")
      Catch e As Exception
        myConnection.Rollback()
        Console.WriteLine(e.ToString())
        Console.WriteLine("Neither record was written to database.")
      Finally
        myConnection.Close()
      End Try
    End Sub
    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

    See Also