C# 将双击改为两次单击

Question

I have been working on an addin with a treeview. But a bug in the treeview control messes up double clicks because the next click get ignored. What I want to achieve is a double click that is read as two single clicks. I have found a solution to this where a double click is always read as a single click. Code Below:

class MyTreeView : TreeView
{
    protected override void WndProc(ref System.Windows.Forms.Message m)
    {
        if (m.Msg == 0x0203)
        {
            m.Result = IntPtr.Zero;
        }
        else
        {
            base.WndProc(ref m);
        }
    }
}

This WndProc method is not my wheelhouse and will probably not be for a long time. But for this addin I need a quick solution. Can somebody provide an answer on how to achieve a double click to two single clicks?

Answer 1

After some more searching I have found a solution. See code below:

protected override void WndProc(ref System.Windows.Forms.Message m)
{
    if (m.Msg == 0x203) m.Msg = 0x201;
    base.WndProc(ref m);
}

Answer 2

The Treeview in windows forms has two events: Click and DoubleClick. You can make Doubleclick execute the Click event twice like this:

public Form1()
    {
        InitializeComponent();
        treeView1.Click += TreeView1_Click;
        treeView1.DoubleClick += TreeView1_DoubleClick;
    }

    private void TreeView1_DoubleClick(object sender, EventArgs e)
    {
        TreeView1_Click(sender, e);
        TreeView1_Click(sender, e);
    }

    private void TreeView1_Click(object sender, EventArgs e)
    {
        System.Diagnostics.Debug.Print("Click");
    }