The documentation for WPF Telerik is really really bad. I can’t stress this enough! The whole documentation should be redone.
I did not find out the solution for the above problem, but I found something better. Instead of using the above GridViewToggleRowDetailsColumn I use the RadGridView.HierarchyChildTemplate and RadGridView.ChildTableDefinitions which behaves exactly as I want to [Basic Hierarchies]
answered on 04 Apr 2019, 01:53 PM
I'm sorry to hear that you're dissatisfied with the quality of our documentation. I can assure you that we're constantly trying to improve its content and any feedback on the articles you have will be greatly appreciated. You can open new issues and/or pull requests in our GitHub repository or use the feedback form which can be found at the bottom of each page to share your constructive comments.
Back to your original reply, please let me clarify that when using row details, you should not use the GridViewToggleRowDetailsColumn together with the RowDetailsVisibilityMode as described in this article.
I do hope, however, that by using the HierarchyChildTemplate instead, you've now achieved the desired result. Please let me know if I can further assist you in any way.
Get quickly onboarded and successful with your Telerik and/or Kendo UI products with the Virtual Classroom free technical training, available to all active customers.Learn More.