Thank you for this question.
This is an interesting case. Currently RadGridView
doesn't support BestFit
for the group header row. We will consider implementing this functionality in one of our future versions.
You have two options to solve this issue:
Set the AutoSizeColumnsMode
property of MasterGridViewTemplate
. In this case, the columns will occupy the whole RadGridView
Change the column width manually by using the Width
I hope this helps. If you have further questions, I will be glad to help.
the Telerik team