如何仅用鼠标左键选择ListViewItem

Question

如何在单击和双击时防止右键单击在列表视图中选择项目？

Answer 1

您可以使用此代码，我认为它应该完成工作。如果SelectedIndexChanged事件处理程序因右键单击而触发，则需要设置一些bool变量以指示在MouseDown中单击了鼠标右键，然后Clear选择了项目，然后重置MouseUp事件上的指示器。检查代码：

bool rightClicked = false;
private void listView1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Right)
{
rightClicked = true;
}
else
{
rightClicked = false;
}
}
private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
if (rightClicked)
{
listView1.SelectedItems.Clear();
}
}
private void listView1_MouseUp(object sender, MouseEventArgs e)
{
rightClicked = false;
}

编辑：这是我能做的最好的事情，它保留了选择，但会闪烁。该解决方案可以使用项目的一些自定义绘图来实现，但这需要太多时间。我把这个留给你。

bool rightClicked = false;
int [] lviListIndex = null;
private void listView1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Right)
{
rightClicked = true;
lviListIndex = new int[listView1.SelectedItems.Count];
listView1.SelectedIndices.CopyTo(lviListIndex, 0);
}
else
{
rightClicked = false;
}
}
private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
if (rightClicked)
{
listView1.SelectedIndices.Clear();   
}
}
private void listView1_MouseUp(object sender, MouseEventArgs e)
{
if (rightClicked)
{
listView1.SelectedIndexChanged -= new System.EventHandler(listView1_SelectedIndexChanged);
if (lviListIndex != null)
{
foreach (int index in lviListIndex)
{
listView1.SelectedIndices.Add(index);
}
}
lviListIndex = null;
listView1.SelectedIndexChanged += new System.EventHandler(listView1_SelectedIndexChanged);
}
rightClicked = false;
}

Answer 2

将listview子类化并添加此覆盖：

protected override void WndProc(ref Message m)
{
const int WM_RBUTTONUP = 0x0205;
const int WM_RBUTTONDOWN = 0x0204;
if ((m.Msg != WM_RBUTTONDOWN) && (m.Msg != WM_RBUTTONUP))
{
base.WndProc(ref m);
}
}

这是通过忽略鼠标右键发出的消息来实现的。

Answer 3

您可以像这样检查if (e.Button == MouseButtons.Left)