I have a grid with a nested view template. I removed the expand/collapse column to create a customized one.
In the ItemDataBound method I do the following:
On the front end I have:
The line firstMasterTableViewRow.set_expanded always seems to call an image for my custom expand button and I end up with an error :
GET http://localserver/mypage/undefined 404 (Not Found)
If I comment the line, I do not have that 404 not found error. But i need to expand / collapse my rows.
Any idea why this error is thrown with that line?