What is the best way to make throbber in c #?

Question

In particular, I want to make the icons for nodes in my System.Windows.Forms.TreeView control block during a lengthy load operation.

Answer 1

If you load each frame into an ImageList, you can use a refresh loop for each frame. Example:

    bool runThrobber = true;
    private void AnimateThrobber(TreeNode animatedNode)
    {
        BackgroundWorker bg = new BackgroundWorker();
        bg.DoWork += new DoWorkEventHandler(delegate
        {
            while (runThrobber)
            {
                this.Invoke((MethodInvoker)delegate
                {
                    animatedNode.SelectedImageIndex++;
                    if (animatedNode.SelectedImageIndex >= imageList1.Images.Count) > animatedNode.SelectedImageIndex = 0;
                });
                Thread.Sleep(100);
            }
        });
        bg.RunWorkerAsync();
    }

Obviously, there are more than a few ways to implement this, but here is the main idea.