如何收到“滚动框”从DataGridView类型滚动事件？ [英] How can I receive the "scroll box" type scroll events from a DataGridView?

问题描述

我有一个DataGridView，我正在听它的Scroll事件。这给我一个ScrollEventArgs对象，其类型成员应该告诉我发生的滚动事件的类型。在 MSDN文档页面上，它说我应该通过侦听类型为ThumbPosition，ThumbTrack，First，Last和EndScroll的事件，可以检测滚动框的移动。

但是，当我拖动滚动框时，我仅获取类型为LargeDecrement和LargeIncrement的事件。

如何访问ThumbPosition，ThumbTrack，First，Last和EndScroll事件？

解决方案

  using System.Reflection; 
使用System.Windows.Forms; 
 
 bool addScrollListener（DataGridView dgv）
 {
 bool ret = false; 
 
类型t = dgv.GetType（）; 
 PropertyInfo pi = t.GetProperty（VerticalScrollBar，BindingFlags.Instance | BindingFlags.NonPublic）; 
 ScrollBar s = null; 
 
 if（pi！= null）
 s = pi.GetValue（dgv，null）as ScrollBar; 
 
 if（s！= null）
 {
 s.Scroll + = new ScrollEventHandler（s_Scroll）; 
 ret = true; 
} 
 
 return ret; 
} 
 
 void s_Scroll（object sender，ScrollEventArgs e）
 {
 // Hander去这里.. 
} 
  

正如你所料，如果你想听水平滚动事件，你将VerticalScrollBar更改为Horizo​​ntalScrollBar

I have a DataGridView, and I'm listening to its Scroll event. This gives me a ScrollEventArgs object whose Type member is supposed to tell me the type of scroll event that has occurred. On the MSDN documentation page it says I should be able to detect movement of the scroll box by listening for events with types ThumbPosition, ThumbTrack, First, Last and EndScroll.

However, when I drag the scroll box, I only get events of type LargeDecrement and LargeIncrement.

How do I get access to the ThumbPosition, ThumbTrack, First, Last and EndScroll events?

解决方案

using System.Reflection;
using System.Windows.Forms;

bool addScrollListener(DataGridView dgv)
{
    bool ret = false;

    Type t = dgv.GetType();
    PropertyInfo pi = t.GetProperty("VerticalScrollBar", BindingFlags.Instance | BindingFlags.NonPublic);
    ScrollBar s = null;

    if (pi != null)
        s = pi.GetValue(dgv, null) as ScrollBar;

    if (s != null)
    {
        s.Scroll += new ScrollEventHandler(s_Scroll);
        ret = true;
    }

    return ret;
}

void s_Scroll(object sender, ScrollEventArgs e)
{
    // Hander goes here..
}

As you'd expect, if you want to listen to horizontal scroll events, you change "VerticalScrollBar" to "HorizontalScrollBar"

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