How to click on group header bar to collapse expand?

[Stanley]

How to click on group header bar to collapse expand?

Just to make more user friendly, let the user click on group header bar to collapse expand the list rather than click on the small button.

Is possible?
Please refer the picture from attachment.

[Ivan Petrov]

Hello Stanley,

Thank you for writing.

You can achieve this behavior through the CellClick event. You have to check whether the user has clicked on a group row and collapse/expand the row. Here is a code snippet which demonstrates this:

this.radGridView1.CellClick += new GridViewCellEventHandler(radGridView1_CellClick);

void radGridView1_CellClick(object sender, GridViewCellEventArgs e)
{
  if (e.Row is GridViewGroupRowInfo)
  {
    e.Row.IsExpanded = !e.Row.IsExpanded;
  }
}

I hope this will be useful for you. Should you have further questions, I would be glad to help.
 
All the best,
Ivan Petrov
the Telerik team

[Stanley]

Thanks for help.

The small icon cannot work properly, need to add in one more condition
sender.GetType().ToString() == "Telerik.WinControls.UI.GridGroupContentCellElement")

if (e.Row is GridViewGroupRowInfo &&
    sender.GetType().ToString() == "Telerik.WinControls.UI.GridGroupContentCellElement")
{
    e.Row.IsExpanded = !e.Row.IsExpanded;
}