Winforms ListView MouseUp 事件触发不止一次 [英] Winforms ListView MouseUp event firing more than once

问题描述

在我的 .NET 4,5 Winforms 应用程序中，当我从该事件中打开文件时，ListView 控件的 MouseUp 事件多次触发，如下所示:

In my .NET 4,5 Winforms application, the ListView control's MouseUp event is firing multiple times when I open a file from that event as follows:

private void ListView1_MouseUp(object sender, MouseEventArgs e)
{
   ListViewHitTestInfo hit = ListView1.HitTest(e.Location);

   if (hit.SubItem != null && hit.SubItem == hit.Item.SubItems[1])
   {
      System.Diagnostics.Process.Start(@"C:Folder1Test.pdf");
      MessageBox.Show("A test");
   }
}

注意:当点击 SubItem1 时在列表视图中，文件打开但消息框至少出现两次.但是，当我注释掉打开文件的行时，消息框只出现一次(应该如此).我确实需要打开用户在列表视图中单击其名称的文件.如何在没有多次触发 MoueUp 事件的情况下实现这一目标?另请注意，listview 的 MouseClick 事件并不总是像 所述这里.所以，我必须使用 MouseUp 事件.

Note: When clicking on the SubItem1 of the listview, the file opens but the message box appears at least twice. But, when I comment out the line that opens the file the message box appears only once (as it should). I do need to open the file whose name is clicked by the user in the listview. How can I achieve this without the MoueUp event firing multiple times? Please also note that the MouseClick event for listview does not always work as also stated here. So, I have to use MouseUp event.

我应该提到 ListView 处于详细信息模式.

I should mention the ListView is in Details mode.

推荐答案

避免 HitTest() 并使用 ListView 的原生函数 GetItemAt()代码>.来自 MSDN 的示例如下所示:

Avoid HitTest() and use ListView's native function GetItemAt(). An example from MSDN looks like this:

private void ListView1_MouseDown(object sender, MouseEventArgs e)
{

    ListViewItem selection = ListView1.GetItemAt(e.X, e.Y);

    // If the user selects an item in the ListView, display 
    // the image in the PictureBox. 
    if (selection != null)
    {
        PictureBox1.Image = System.Drawing.Image.FromFile(
            selection.SubItems[1].Text);
    }
}

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