Select GridView row on Row Indicator Click

Environment

Product Version	2022.2.621
Product	RadGridView for WPF

Description

How to select RadGridView row when you click on the cell on the left side of the row (the row indicator).

Solution

Get the Border element that represents the row indicator and subscribe to its MouseLeftButtonDown event. Then, in the event handler, select the row manually. To get the Border you can use the RowLoaded event of RadGridView in combination with the ChildrenOfType extension method. The RowUnloaded event can be used to unsubscribe from the mouse event, thus preventing memory leaks.

private void RadGridView_RowLoaded(object sender, Telerik.Windows.Controls.GridView.RowLoadedEventArgs e) 
{ 
    var indicator = e.Row.ChildrenOfType<Border>().FirstOrDefault(x => x.Name == "PART_IndicatorPresenter"); 
    if (indicator != null) 
    { 
        indicator.MouseLeftButtonDown += Indicator_MouseLeftButtonDown; 
    } 
} 
 
private void RadGridView_RowUnloaded(object sender, Telerik.Windows.Controls.GridView.RowUnloadedEventArgs e) 
{ 
    var indicator = e.Row.ChildrenOfType<Border>().FirstOrDefault(x => x.Name == "PART_IndicatorPresenter"); 
    if (indicator != null) 
    { 
        indicator.MouseLeftButtonDown -= Indicator_MouseLeftButtonDown; 
    } 
} 
 
private void Indicator_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e) 
{ 
    var indicator = (Border)sender; 
    var dataItem = indicator.DataContext; 
    this.gridView.SelectedItems.Add(dataItem); 
}