[Solved] Best way to track column width changes?

[Jason]

Hi,

I can see this is a little bit of a recurring question in the forums, but what is the latest best way of tracking user column width changes in RadVirtualGrid and RadGridView? We're interested in making the format of decimals displayed in the cells respond to the available width.

We're currently using 2025.1.211 but could upgrade if that helped.

Thanks in advance,

__Jason

[Jason]

I think we are probably most interested in RadVirtualGrid.

[Jason]

I'd also be interested in noticing a double-click in a column header in order to reset the column size to the default.

[Nadya | Tech Support Engineer]

Hello, Jason,

Tracking Column Width Changes in RadVirtualGrid and RadGridView:

• For RadGridView, there are ColumnWidthChanging / ColumnWidthChanged events. This event fires whenever a user resizes a column, allowing you to adjust the decimal formatting based on the new width. Here’s a basicexample: https://www.telerik.com/products/wpf/documentation/controls/radgridview/columns/resizing-columns#resizing-events 

• In RadVirtualGrid, these events are still not available but we have a logged feature request on our feedback portal: VirtualGrid: Introduce events for when the columns are resized I noticed that you have already found the same item in our portal. At this moment I can not another solution that can track column width changes for RadVirtualGrid.

  If you are interested in resizing the columns to available width, you can use the FitColumnWidthToContent method. More information is available here: https://www.telerik.com/products/wpf/documentation/controls/radvirtualgrid/features/column-and-row-resizing#fit-column-width 

Detecting Double-Click in Column Header

• RadVirtualGrid does not have a built-in event specifically for double-clicking a column header. However, you can achieve this by attaching a MouseDoubleClick event handler to the header elements. In the event handler, check if the double-click occurred on a header, then reset the column width to your default value:

this.radVirtualGrid1.MouseDoubleClick += RadVirtualGrid1_MouseDoubleClick;

private void RadVirtualGrid1_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
   // TO DO
}

• You may need to use the grid's visual tree to attach this handler to the header elements during grid initialization.

At this moment, on double click the virtual grid can sort the rows automatically. We have another feature request logged for reset the column width, here you can find the feedback item: VirtualGrid: Allow auto-fit for the column headers on double click on the column resize handle

I hope this information is useful. If you have any other questions, please let me know.

Regards,
Nadya | Tech Support Engineer
Progress Telerik