Treeview.SelectedNode not working properly

Question

I'm trying to create a custom acting TreeView. When you click a node it should toggle as selected/unselected. Currently I can select a node once by clicking it, deselect the node by clicking it again, but I am unable to select the node again via clicking unless I select another node first. Any help would be greatly appreciated.

TreeNode lastNode;

private void treeViewMS1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{
    if (lastNode == e.Node)
    {
        treeViewMS1.SelectedNode = null;
        lastNode = null;
    }
    else
    {
        if (lastNode == null)
        {
            treeViewMS1.SelectedNode = e.Node;
        }
        lastNode = e.Node;
    }
}

LarsTech · Accepted Answer · 2015-05-27 17:00:07Z

1

Try using the BeginInvoke procedure to delay the action until after the mouse click event is done processing. It's probably interfering:

TreeNode lastNode;
private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e) {
  this.BeginInvoke(new Action(() => {
    if (lastNode == e.Node) {
      treeView1.SelectedNode = null;
      lastNode = null;
    } else {
      if (lastNode == null) {
        treeView1.SelectedNode = e.Node;
      }
      lastNode = e.Node;
    }
  }));
}

If the Action method isn't available, you can use the MethodInvoker style:

this.BeginInvoke((MethodInvoker)delegate {

edited May 27, 2015 at 17:00

answered May 27, 2015 at 15:28

LarsTech

81.9k14 gold badges161 silver badges237 bronze badges

Sign up to request clarification or add additional context in comments.

7 Comments

Dan Gifford Over a year ago

Forgive me, how do I do that?

LarsTech Over a year ago

@DanGifford How do you do what? I posted the code.

Dan Gifford Over a year ago

Your code generates the following compilation error: Error 1 Using the generic type 'System.Action<T>' requires 1 type arguments. Thoughts?

LarsTech Over a year ago

@DanGifford What .Net version are you using? Updated the post with the MethodInvoker version.

Dan Gifford Over a year ago

I'm still getting errors with the MethodInvoker technique.

|

Collectives™ on Stack Overflow

Treeview.SelectedNode not working properly

1 Answer 1

7 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

7 Comments

Your Answer

Sign up or log in

Post as a guest

Related