ASP.NET TreeView and Selecting the Selected Node

asp.nettreeview

How do I capture the event of the clicking the Selected Node of a TreeView?
It doesn't fire the SelectedNodeChanged since the selection has obviously not changed but then what event can I catch so I know that the Selected Node was clicked?

UPDATE:
When I have some time, I'm going to have to dive into the bowels of the TreeView control and dig out what and where it handles the click events and subclass the TreeView to expose a new event OnSelectedNodeClicked.

I'll probably do this over the Christmas holidays and I'll report back with the results.

UPDATE:
I have come up with a solution below that sub-classes the TreeView control.

Best Answer

Easiest way - if it doesn't interfere with the rest of your code - is to simply set the node as not selected in the SelectedNodeChanged method.

protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e){
  // Do whatever you're doing
  TreeView1.SelectedNode.Selected = false;
}

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jQuery's documentation states:

[jQuery.val] checks, or selects, all the radio buttons, checkboxes, and select options that match the set of values.

This behavior is in jQuery versions 1.2 and above.

You most likely want this:

$("._statusDDL").val('2');

C# – Windows Forms TreeView always selects a node on focus

I agree that using TreeViewAction.Unknown in this case is less than desirable. Consider using the BeforeSelect event, which provides an opportunity to prevent the AfterSelect event.

Create a GotFocus event handler that sets a flag. Then, create a BeforeSelect event handler that, if the flag is set, cancels the event and clears the flag. For example:

private bool treeViewWasNewlyFocused = false;

private void TreeView1_BeforeSelect(object sender, TreeViewCancelEventArgs e)
{
    if(treeViewWasNewlyFocused)
    {
        e.Cancel = true;
        treeViewWasNewlyFocused = false;
    }
}

private void TreeView1_GotFocus(object sender, EventArgs e)
{
    treeViewWasNewlyFocused = true;
}

Best Answer

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C# – Windows Forms TreeView always selects a node on focus

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