Disabling Expand Button

[Kevin]

Is there a way to disable the expand/collapse button?  I'm trying to get the tree structure and layout but always want the treelist expanded without allowing the user the ability to collapse the children.

Thanks,

[Veli]

Hi Kevin,

There are different approaches for doing that. You can:

1. Hide the expand/collapse buttons in all items:

protected void RadTreeList1_ItemCreated(object sender, TreeListItemCreatedEventArgs e)
{
    if (e.Item is TreeListDataItem)
    {
        Control expandButton = e.Item.FindControl("ExpandCollapseButton");
        if (expandButton != null)
        {
            expandButton.Visible = false;
        }
    }
}

2. Make the expand/collapse buttons disabled:

protected void RadTreeList1_ItemCreated(object sender, TreeListItemCreatedEventArgs e)
{
    if (e.Item is TreeListDataItem)
    {
        Control expandButton = e.Item.FindControl("ExpandCollapseButton");
        if (expandButton != null)
        {
            ((Button)expandButton).Enabled = false;
        }
    }
}

3. Allow the buttons to be clicked, but cancel the ExpandCollapse command on the server:

protected void RadTreeList1_ItemCommand(object sender, TreeListCommandEventArgs e)
{
    if (e.CommandName == RadTreeList.ExpandCollapseCommandName)
    {
        e.Canceled = true;
    }
}

Any of the above 3 approaches should work in your case.

Greetings,
Veli
the Telerik team