RadWindow.Alert behind another RadWindow

[Kelley Wong]

I have a Radwindow
when i check the error ,i use RadWindow.Alert to show me the error

First i use a RadWindow(parent) which contains a GridView to show datasource
Then select some records and click the delete button named  toolbarDeleteThemeObj, the click event as follows

private void toolbarDeleteThemeObj_Click(object sender, RoutedEventArgs e)
        {
            RadWindow.Confirm(CommonResource.ConfirmDeleteNotRecoveredPrompt, new EventHandler<WindowClosedEventArgs>(OnObjectiveThemeWindowClosed));
        }

private void OnObjectiveThemeWindowClosed(object sender, WindowClosedEventArgs e)
        {
            if (e.DialogResult == true)
            {
                if(SelectedItem.Count<=0)
                {
                    RadWindow.Alert("No Record Selected");
                    return;
                }

                //sth other
            }
        }

RadWindow.Confirm shows correctly,but

the bug is RadWindow.Alert  show behind the parent RadWindow ,so i must close the parent RadWindow to see the error RadWindow.

[hwsoderlund]

I have struggled a lot with issues like this in the past. It seems that they are inevitable in certain situations with multi-window applications. Especially when opening windows from the WindowClosed event handler of another window, like you do here. The workaround that I always use is to dispatch the opening of the window. Change this:
RadWindow.Alert("No Record Selected");

To this:
Dispatcher.BeginInvoke(() => RadWindow.Alert("No Record Selected"));

And see if it helps.

[Afsal]

Please take a look at the following link:

http://www.telerik.com/community/forums/silverlight/window/modal-dialog-appearing-behind-parent-radwindow.aspx