如何以编程方式滚动一个winforms datagridview控件？ [英] How do I programmatically scroll a winforms datagridview control?

问题描述

我正在一个从datagridview继承的控件中实现一些拖放功能。基本上我在DGV的某个地方拖了一排，并将其放在别的地方，重新排列行。我遇到了一个问题。如果DGV太大，以至于有一个滚动条，那么当用户在拖动画面的中间时，如何让DGV向上或向下滚动？

我知道如何获取当前的鼠标位置，并获取dgv矩形的位置等。所以，我可以很容易地找出我是否在矩形的顶部或底部的一半...我只需要一种以编程方式滚动dgv的方法。如果我不需要继续更改选定的单元格，我更愿意这样做。

任何建议？

谢谢

Isaac

解决方案

一个datagridview ...对不起，'winforms'在问题...但我可以这样做..向上或向下滚动一行。

向上滚动：

  this.FirstDisplayedScrollingRowIndex = this.FirstDisplayedScrollingRowIndex  -  1 
  

向下滚动：

  this.FirstDisplayedScrollingRowIndex = this.FirstDisplayedScrollingRowIndex + 1; 
  

你必须确保检查数字不会超出界限。 / p>

I'm implementing some drag drop features in one my controls inheriting from a datagridview. Basically I'm dragging a row from somewhere in the DGV and dropping it somewhere else, reordering the rows. I've run into a problem though. If the DGV is too large such that there's a scrollbar, how can I have the DGV scroll up or down while the user is in the middle of a dragdrop?

I know how to get the current mouse position and also get the position of the dgv rectangle and such. So, I can easily find out if i'm in the top or bottom half of the rectangle... I just need a way to programmatically scroll the dgv. I'd prefer if I don't have to keep changing the selected cell to do this.

Any suggestions?

Thanks

Isaac

解决方案

Well, since this is a datagridview... Sorry for the 'winforms' in the question... but I could just do this.. scrolling up or down one row.

Scroll up:

this.FirstDisplayedScrollingRowIndex = this.FirstDisplayedScrollingRowIndex - 1

Scroll Down:

this.FirstDisplayedScrollingRowIndex = this.FirstDisplayedScrollingRowIndex + 1;

You've gotta make sure to check that the numbers don't go out of bounds though.

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