如何删除在窗口c＃中对数据表进行的最后更改 [英] how to delete last change made into datatable in window c#

问题描述

任何人都告诉我如何撤消在窗口c中对数据表进行的最后更改＃







先生我有一个数据表，我在其中执行一些操作（如总和，减去等）我想要一个功能，只恢复我在gridview中做的最后一次更改（例如，如果我从gridview数据中删除@符号我希望它还原）通过单击撤消按钮pls hlep me

anyone tell me how to undo last change made into datatable in window c#



sir i have a datatable in which i perform some operation (like sum,subtract etc) i want a functionality that revert only last change that i have made in gridview( for eg if i delete "@" sign from gridview data i want it revert back )by clicking on undo button pls hlep me

推荐答案

您可以使用 RejectChanges 。它将恢复自上次调用 AcceptChanges 以来的所有更改。

我想诀窍是知道何时调用 AcceptChanges 。

应该在添加下一行之前完成。

如果你有一个向数据表添加新行的功能你可以这样做。

You can can use RejectChanges. It will revert all changes since the last call to AcceptChanges.
I guess the trick is to know when to call AcceptChanges.
It should be done before the next row is added.
If you have a a function for adding a new row to the data table you can do likes this.

private DataTable dt = new DataTable();
private void AddRow()
{
  dt.AcceptChanges();
  dt.Rows.Add(param1, param2, etc);
}

private void OnUndo()
{
   dt.RejectChanges();
}

这是一种非常简单的方法。

This is a very simplistic approach.

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