我怎样才能收到＆QUOT;滚动框＆QUOT;从一个DataGridView型涡旋事件？ [英] How can I receive the "scroll box" type scroll events from a DataGridView?

问题描述

我有一个DataGridView，而我在听它的滚动的事件。这给了我一个ScrollEventArgs对象，其类型成员应该告诉我，已经发生的滚动事件的类型。在 MSDN文档页面它说我应该能够探测运动通过侦听与类型ThumbPosition，ThumbTrack，首先，最后和EndScroll事件滚动框。

然而，当我拖动滚动框，我只得到类型LargeDecrement和LargeIncrement的事件。

如何获得访问ThumbPosition，ThumbTrack，首先，最后和EndScroll事件？

解决方案

 使用的System.Reflection;
使用System.Windows.Forms的;

布尔addScrollListener（DataGridView中DGV）
{
    布尔RET = FALSE;

    类型t = dgv.GetType（）;
    的PropertyInfo PI = t.GetProperty（VerticalScrollBar，BindingFlags.Instance | BindingFlags.NonPublic可）;
    滚动条S = NULL;

    如果（PI！= NULL）
        S = pi.GetValue（DGV，空）的滚动条;

    如果（S！= NULL）
    {
        s.Scroll + =新ScrollEventHandler（s_Scroll）;
        RET = TRUE;
    }

    返回RET;
}

无效s_Scroll（对象发件人，ScrollEventArgs E）
{
    //投手去这里..
}
 

正如你所期望的，如果你想听听水平滚动的事件，你改变VerticalScrollBar到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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