单击另一个DataGrid时如何失去对DataGrid的关注？

Question

I am using MVVM WPF and I need to lose focus, when I click on another DataGrid, so I will have selected only one row in one DataGrid.

Or if it is possible, to lose focus when I click outside of DataGrids? But will it lose focus also when I want to click edit button on selected row from DataGrid?

protected override void OnLostFocus(System.Windows.RoutedEventArgs e)
{
  base.OnLostFocus(e);
  this.SelectedItems.Clear();
  this.SelectedItem = null;
}

This is my OnLostFocus, but I don't know how to catch the click in xaml (I am really new in xaml)

UPDATE: Can I use style trigger somehow to focus from one DataGrid to another?

Answer 1

try :

 datagrid1.UnselectAll();
 datagrid2.Focus();

UPDATE : You can use MouseEnter event instead of override LostFocus like this:

  private void dataGrid1_MouseEnter(object sender, MouseEventArgs e)
    {
        dataGrid2.UnselectAll();
    }

    private void dataGrid2_MouseEnter(object sender, MouseEventArgs e)
    {
        dataGrid1.UnselectAll();
    }

XAML :

   <DataGrid  Focusable="True" Name="dataGrid1" MouseEnter="dataGrid1_MouseEnter" ItemsSource="{Binding}" SelectionUnit="Cell" CanUserDeleteRows="False" CanUserAddRows="False" CanUserReorderColumns="False" CanUserSortColumns="True" Margin="217,0,0,0"  />
    <DataGrid  Focusable="True" Name="dataGrid2" MouseEnter="dataGrid2_MouseEnter" ItemsSource="{Binding}" SelectionUnit="Cell" CanUserDeleteRows="False" CanUserAddRows="False" CanUserReorderColumns="False" CanUserSortColumns="True" Margin="10,-10,343,10"  />

Answer 2

I fixed it in code behind. This works like a charm! (With MouseDown it didn't work well, I don't know why)

 public override void OnApplyTemplate()
{
  base.OnApplyTemplate();

  dataGrid = GetTemplateChild("dataGrid") as DataGrid;
  dataGrid.MouseUp += new MouseButtonEventHandler(dataGrid_MouseUp);
  docGrid = GetTemplateChild("docGrid") as DataGrid;
  docGrid.MouseUp += new MouseButtonEventHandler(docGrid_MouseUp);
}

public void dataGrid_MouseUp(object sender, MouseEventArgs e)
{
  docGrid.UnselectAll();
}

public void docGrid_MouseUp(object sender, MouseEventArgs e)
{
  dataGrid.UnselectAll();
}