Hi,

The Problem is obvious, which is;

While I can set the visibility of Buttons to Visible by the same code, why can't I do that to stack buttons.

WebFishEyeButton.Visibility=Visibility.Collapsed works

but

WebFishEyeStackButton.Visibility=Visibility.Collapsed doesn't work

Based on my discussion with the developer, StackButton visibility property will not work because it is only the control model, in order for the visibility property to work you will need to set it to the control element.

My test show modifying visibility will work during WebFishEyeButton click event handler. However, there will be an empty space where the stackbutton resides. Here is the snippet if you would like to try it yourself:

private void FishEye1_ButtonClick(object sender, ISNet.Silverlight.WebAqua.WebFishEyeButtonEventArgs e)
{
    if (e.Button.ItemName == "btnSearch")
    {
        Storyboard toolbarDelay = new Storyboard() { BeginTime = TimeSpan.FromSeconds(0.1) };
        toolbarDelay.Completed += (s, evt) => {
            ((WebFishEyeButton)e.Button).StackButtons[0].GetButtonElement().Visibility = System.Windows.Visibility.Collapsed;
        };
        toolbarDelay.Begin();
    }
}

For such scenario we suggest removing the stackbutton in order to display the stackbutton correctly.

If you are interested, we will release WebUI Studio 2010 R1 RC that will inlcude new version of our Silverlight product soon. Please check http://www.intersoftpt.com regularly for further details regarding our RC.