Updated on Kisan Patel
Problem:
Is there any way to collapse/hide the group tree box that appears on the left hand side of my generated report? I saw a couple of proposed solutions but none seem to work for me.
Solution:
There is a property called ToggleSidePanel on report viewer you can set as follows:
yourViewer.ToggleSidePanel = Constants.SidePanelKind.None;