我怎样才能收到“滚动框"?从 DataGridView 输入滚动事件? [英] How can I receive the "scroll box" type scroll events from a DataGridView?

问题描述

我有一个 DataGridView，我正在监听它的 Scroll 事件.这给了我一个 ScrollEventArgs 对象，它的 Type 成员应该告诉我发生的滚动事件的类型.在 MSDN 文档页面 上，它说我应该能够通过侦听 ThumbPosition、ThumbTrack、First、Last 和 EndScroll 类型的事件来检测滚动框的移动.

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.

但是，当我拖动滚动框时，我只能获得 LargeDecrement 和 LargeIncrement 类型的事件.

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

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

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

推荐答案

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..
}

如您所料，如果您想收听水平滚动事件，请将VerticalScrollBar"更改为Horizo​​ntalScrollBar"

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

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