Last Updated: 05 Oct 2016 13:27 by ADMIN
Created on: 28 Sep 2016 06:18
Category: UI Framework
Type: Bug Report
FIX. TPF - tooltips are not thread safe
When a child form is opened in a new thread, and tooltips are used in the child form, cross thread exception is thrown, due to the fact that RadToolTip internally uses a static control instance.

 public class ManagedThread
        private Thread _thread;
        public ManagedThread()
            _thread = new Thread(new ThreadStart(OpenNew));

        private void OpenNew()
            Child form = new Child();
            form.Text = "my text";

The second time the child form is opened, when you try to show tooltips of a control e.g. RadDropDownList with ToolTipTextNeeded, the exception is thrown.

Workaround: use screentips instead of tooltips:
(Total attached files size should be smaller than 20mb. Allowed extensions: .zip, .rar, .jpg, .png, .gif)
Posted on: 04 Oct 2016 08:16
It it with all controls, and the fix will apply to them all.
Eduardo Almeida
Posted on: 28 Sep 2016 14:42
Is this the problem with your dropdown list or all telerik controls having tooltip functionality? Just confirming because we might have this problem with other controls too