在WPF网格行中显示多个上下文菜单

Question

I wish to have two context menu in grid view in my WPf based desktop application . Currently i am able to display one context menu, but I want to show context menu 1 on one condition and context menu 2 on another condition . How to do that?

I am usign following XAML code to show grid and context menu

<dg:UCGrid x:Name="grdLetVariables" Grid.Row="2" GridTypeSource="LetGrid"
                                                 DataContext="{Binding}" >
                                <dg:UCGrid.Resources>
                                    <x:Array Type="{x:Type sys:Object}" x:Key="GridExtensions">
                                        <MenuItem Header="Delete" Click="ContextMenuDelete">
                                            <MenuItem.Icon>
                                                <Image Height="10" Source="../images/Delete.png"/>
                                            </MenuItem.Icon>
                                        </MenuItem>
                                        <Separator />
                                        <MenuItem Header="Move Up" Click="MoveUpLetGrdRow">
                                            <MenuItem.Icon>
                                                <Image Height="14" Source="../images/UpMove.png"/>
                                            </MenuItem.Icon>
                                        </MenuItem>
                                        <MenuItem Header="Move Down" Click="MoveDownLetGrdRow">
                                            <MenuItem.Icon>
                                                <Image Height="14" Source="../images/DownMove.png"/>
                                            </MenuItem.Icon>
                                        </MenuItem>
                                        <Separator />
                                        <MenuItem Header="Cancel" Click="CancelLetGrdRowEdit"/>
                                    </x:Array>
                                </dg:UCGrid.Resources>
                                <dg:UCGrid.ContextMenu>
                                    <ContextMenu>
                                        <ContextMenu.ItemsSource>
                                            <CompositeCollection>
                                                <CollectionContainer Collection="{StaticResource GridExtensions}" />
                                            </CompositeCollection>
                                        </ContextMenu.ItemsSource>
                                    </ContextMenu>
                                </dg:UCGrid.ContextMenu>
                            </dg:UCGrid>
                        </Grid>

Answer 1

Triggers on DataGrid can help you here. Code below is just for illustration ...

<UserContorl.Resources>
    <ContextMenu x:Key="Condition1ContextMenu" ../>
    <ContextMenu x:Key="Condition2ContextMenu" ../>
</UserControl.Resources>
...
<Style TargetType="{x:Type dg:UCGrid}">
   <Style.Triggers>
      <DataTrigger Binding="{Binding Condition1}" Value="Value1">
          <Setter Property="ContextMenu" Value="{StaticResource Condition1ContextMenu}"/>
      </DataTrigger>
      <DataTrigger Binding="{Binding Condition2}" Value="Value2">
          <Setter Property="ContextMenu" Value="{StaticResource Condition2ContextMenu}"/>
      </DataTrigger>
   </Style.Triggers>
</Style>

Ofcourse condition1 and condition2 must be exclusive of each other. If both of them are applicable on the data grid then due to order Condition2ContextMenu will take the precedence.

Let me know if this helps...