MAINTABLE为主表,SONTABLE为子表,请问以下代码有何不对:
 public void Updats(DataSet ds ,string Maintable,string []sontable,string[]sqlstrings)
    {
        ds.EnforceConstraints = true;//指示在执行更新操作时是否遵循约束规则
        if (ds.HasChanges())
        {
            OpenConnection();
            Command = Connection.CreateCommand();
            SqlTransaction mystrans;//定义一个事务对像并执行.
            mystrans = Connection.BeginTransaction();
            Command.Connection = Connection;
            Command.Transaction = mystrans;
            try
            {
                TableFill(ds, sqlstrings[0], Maintable);
                Adapter.Update(ds.Tables[Maintable].Select(null, null, DataViewRowState.Added | DataViewRowState.ModifiedCurrent));
                int i;
                for (i = 1; i <= sontable.Length; i++)
                {
                    TableFill(ds, sqlstrings[i], sontable[i - 1]);
                    Adapter.Update(ds.Tables[sontable[i - 1]]);
                }
                Adapter.Update(ds.Tables[Maintable].Select(null, null, DataViewRowState.Deleted));
                ();
            }
            catch
            {
                try
                {
                    mystrans.Rollback();//回滚事务.
                }
                catch (Exception ex)
                {
                    throw new Exception(ex.Message);
                }
            }
            finally
            {
                ds.Dispose();
                Adapter.Dispose();
                CloseConnection();
            }
        }
      
    }
刚执行到: TableFill(ds, sqlstrings[0], Maintable);就直接跳到下面的CATCH语句了,并报错: 此 SqlTransaction 已完成；它再也无法使用。