Last Updated: 03 Oct 2019 11:49 by ADMIN
Release R3 2019 SP1 (LIB 2019.3.1007)
Created on: 29 Jul 2019 15:17
Category: VirtualGrid
Type: Bug Report
RadVirtualGrid: Problem expansion last row


I have a problem with the expansion of the last row.

After Row Expanding and Row Collapsing the last or second last row, the last row is not visible because it seems that there I some kind of lock on the scrollbar : it doesn’t scroll down neither with the mouse wheel nor with the button so it is not possible to move on the last row.

If instead you scroll up and then down the row became visible again.

In the attached example project.






1 comment
Dess | Tech Support Engineer, Sr.
Posted on: 30 Jul 2019 08:35
Hello, Lorenzo,   

The provided sample project and gif file are greatly appreciated. I was able to replicate the undesired behavior. I have logged it in our feedback portal by making this thread public. You can track its progress, subscribe for status changes and add your comments on the following link - feedback item.

I have also updated your Telerik points.

Currently, the possible solution that I can suggest is to force scrolling in order to update the vertical scrollbar's range when a row is collapsed:

private void radVirtualGrid1_RowCollapsed(object sender, Telerik.WinControls.UI.VirtualGridRowExpandedEventArgs e)
    var value = this.radVirtualGrid1.TableElement.VScrollBar.Value;
    this.radVirtualGrid1.TableElement.VScrollBar.Value = 0;
    this.radVirtualGrid1.TableElement.VScrollBar.Value = value;

I hope this information helps. If you need any further assistance please don't hesitate to contact me. 

Dess | Tech Support Engineer, Sr.
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