Question

I have a custom ComboBox with a TreeView inside of it (modified from code here), and am having issues with getting the DropDownHeight to correctly show everything. Not only can I not get the initial DropDownHeight right (tried setting to treeview.height), but I would also like it to resize when a tree is opened to show everything without a scrollbar. Is this possible? Let me know if you need any more information!

Answer 1

This bit of code in the link you provided should work:

private void ShowDropDown() 
{
   if (dropDown != null)
   {
      treeViewHost.Width = DropDownWidth;
      treeViewHost.Height = DropDownHeight;
      dropDown.Show(this, 0, this.Height);
   }
}

ComboBox automatically resizes itself based on the content it is rendering.