来自当前记录的新记录

Question

有时我的数据库中的新记录与之前几乎相同，我想创建一个按钮“从上次创建”，从上次创建新记录（如果这不是第一个记录）

我想是这样的： object rec = BindingSource1.Current; BindingSource1.Add(cur);

，但我得到这个错误：

A first chance exception of type 'System.ArgumentException' occurred in System.Data.dll

Additional information: Cannot add external objects to this list.

Answer 1

终于让我找到一个答案！

我用我的BindingSource1的.AddingNew事件

private void BindingSource1_AddingNew(object sender, AddingNewEventArgs e) 
     { 
    if(need_insert_from_Current) 
       { 
       BindingSource bs =(BindingSource)sender; 
       DataRowView cur = (DataRowView)bs.Current; 
       DataView dv=(DataView)bs.List; 
       DataRowView drv=dv.AddNew(); 
       // Collect data from current rec (except from the 1st value (Id is Identity !) 
       for (int i = 1; i <= dv.Table.Columns.Count-1; i++) 
       { 
        drv.Row[i] = cur.Row[i]; 
       } 
       bs.Position = bs.Count - 1; 
       e.NewObject = drv; 
       need_insert = true; 
       need_insert_from_Current=false; 
       } 
     }