Home/ Questions/Q 43533

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-10T15:30:36+00:00

Having a problem getting a TreeView control to display node images. The code below

  • 0

Having a problem getting a TreeView control to display node images. The code below works sometimes but fails to show any image at other times.

 private TreeNode AddNodeForCore(TreeNode root, Core c) {     string key = GetImageKey(c);     TreeNode t = root.Nodes.Add(c.Name, c.Name, key, key);     t.Tag = c;     return t; }

Note that when it fails, the TreeView fails to show any images for any node. The TreeView does have an ImageList assigned to it, and the image key is definitely in the images collection.

Edit:
My google-fu is weak. Can’t believe I didn’t find that answer myself.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. The helpful bit of the googled posts above is in fact:

    ‘This is a known bug in the Windows XP visual styles implementation. Certain controls, like ImageList, do not get properly initialized when they’ve been created before the app calls Application.EnableVisualStyles(). The normal Main() implementation in a C#’s Program.cs avoids this. Thanks for posting back!’

    So basically, guarantee that Application.EnableVisualStyles() is called before you initialise your imagelist.

    • 0