C#中的事务用法实例分析

SqlTransaction Tran = DBConn.BeginTransaction();
cmdTmp.Transaction = Tran;
try
{ 
  cmdTmp.CommandText = "DELETE FROM xxx";
  cmdTmp.ExecuteNonQuery();
  cmdTmp.CommandText = "INSERT INTO xxx";
  cmdTmp.ExecuteNonQuery();
  Tran.Commit();
}
catch (Exception ex)
{
  Tran.Rollback();
  throw ex;
}
finally
{
  Tran.Dispose();
  cmdTmp.Transaction = null;
}