Rollback Method (UniConnection)

In This Topic

Rolls back a transaction from a pending state.

Syntax

Visual Basic
C#

'Declaration
 
Public Sub Rollback()

public void Rollback()

Example

The following example demonstrates how to use Commit and Rollback methods.

csharp

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();
  }
}

Visual Basic

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

Reference

UniConnection Class
UniConnection Members
Commit Method
BeginTransaction Method

Send Feedback