WPF中如何使得DataGrid的Column有鼠标点击相应

The headers are just buttons. Like any button, you can register to the Click event to capture those clicks. Just set a style targeting DataGridColumnHeader and add a Click event handler. Then within the handler, you have access to the header directly via the sender. You could then get the Columnassociated with that header and other information associated with it.

Then in the code:

private void columnHeader_Click(object sender, RoutedEventArgs e)
{
    var columnHeader = sender as DataGridColumnHeader;
    if (columnHeader != null)
    {
        // do stuff
    }
}

Looking further into the DataGrid, I noticed that there's a ColumnHeaderStyle property. I think it would be a better idea to apply the style through this property instead.