ColumnHeaderTap Command

Handles the Tap gesture over a ColumnHeader. The default implementation of this command will try to add a new Sort Descriptor to the SortDescriptors collection of the grid, thus changing the current sort order of the data. The execution parameter is of type ColumnHeaderTapContext which exposes the following properties:

• Column: Gets or sets the DataGridColumn instance which header has been tapped.
• CanSort: Determines whether the user is allowed to sort the data through the UI (as specified by the RadDataGrid.UserSortMode property).
• IsMultipleSortAllowed: Determines whether any existing sort will be cleared before new sort is applied (if any).

This example creates a class that inherits from the DataGridCommand and then adds it to the RadDataGrid.Commands collection

public class CustomColumnHeaderTapCommand : DataGridCommand
{
    public CustomColumnHeaderTapCommand()
    {
        this.Id = CommandId.ColumnHeaderTap;
    }

    public override bool CanExecute(object parameter)
    {
        var context = parameter as ColumnHeaderTapContext;
        // put your custom logic here
        return true;
    }

    public override void Execute(object parameter)
    {
        var context = parameter as ColumnHeaderTapContext;
        // put your custom logic here               
    }
}

Here is the XAML declaration:

<grid:RadDataGrid>
    <grid:RadDataGrid.Commands>
        <local:CustomColumnHeaderTapCommand/>
    </grid:RadDataGrid.Commands>
</grid:RadDataGrid>