TargetType = "{x: Type GroupItem}" style de flèche dans WPF

Question

Comment changer le style de flèche pour <wpftoolkit:DataGrid.GroupStyle>

Answer 1

S'il vous plaît trouver la solution pour la question ci-dessus

 <ControlTemplate x:Key="newToggleButtonControlTemplate" TargetType="{x:Type ToggleButton}"> 
      <Grid> 
       <Ellipse Fill="{DynamicResource ExpanderArrowFill}" 
         Stroke="DarkGray" 
         HorizontalAlignment="Center" 
         x:Name="circle"      
         VerticalAlignment="Center" 
         Width="20" Height="20"/> 
       <Path 
       x:Name="Up_Arrow" 
       HorizontalAlignment="Center" 
       VerticalAlignment="Center" 
       Fill="White" 
       Data="M 0 0 L 5 5 L 10 0 Z" /> 

       <Path 
       x:Name="Down_Arrow" 
       Visibility="Collapsed" 
       HorizontalAlignment="Center" 
       VerticalAlignment="Center" 
       Fill="White"      
       Data="M 0 5 L 5 0 L 10 5 Z" /> 
      </Grid> 
      <ControlTemplate.Triggers> 
       <Trigger Property="IsMouseOver" Value="true"> 
        <Setter Property="Fill" Value="{DynamicResource MouseOverBrush}" TargetName="circle"/> 
       </Trigger> 
       <Trigger Property="IsPressed" Value="true"> 
        <Setter Property="Fill" Value="{DynamicResource PressedBrush}" TargetName="circle"/> 
       </Trigger> 
       <Trigger Property="IsChecked" Value="true"> 
        <Setter Property="Visibility" Value="Visible" TargetName="Down_Arrow"/> 
        <Setter Property="Visibility" Value="Collapsed" TargetName="Up_Arrow"/> 
       </Trigger> 
      </ControlTemplate.Triggers> 
     </ControlTemplate> 
     <Style x:Key="newExpanderStyle" TargetType="{x:Type Expander}"> 
      <Setter Property="Template"> 
       <Setter.Value> 
        <ControlTemplate TargetType="{x:Type Expander}"> 
         <Grid Background="#720151"> 
          <Grid.RowDefinitions> 
           <RowDefinition Height="Auto"/> 
           <RowDefinition Height="*" x:Name="ContentRow"/> 
          </Grid.RowDefinitions> 
          <Border 
          x:Name="Border" 
          Grid.Row="0" 
          BorderThickness="{TemplateBinding BorderThickness}" 
          CornerRadius="2,2,0,0" > 
           <Grid> 
            <Grid.ColumnDefinitions> 
             <ColumnDefinition Width="20"/> 
             <ColumnDefinition Width="*"/> 
            </Grid.ColumnDefinitions> 

            <ToggleButton            
            Template="{DynamicResource newToggleButtonControlTemplate}"                      
            IsChecked="{Binding Path=IsExpanded, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" OverridesDefaultStyle="True" /> 
            <ContentPresenter Grid.Column="1" Margin="4" RecognizesAccessKey="True" ContentSource="Header" /> 
           </Grid> 
          </Border> 
          <Border 
          x:Name="ExpandSite" 
          Grid.Row="1" 
          Visibility="Collapsed" 
          BorderThickness="1,0,1,1" 
          CornerRadius="0,0,2,2" > 
           <ContentPresenter 
           HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" 
           VerticalAlignment="{TemplateBinding VerticalContentAlignment}"           
           Focusable="false"/> 
          </Border> 
         </Grid> 
         <ControlTemplate.Triggers> 
          <Trigger Property="IsExpanded" Value="True"> 
           <Setter Property="Visibility" Value="Visible" TargetName="ExpandSite"/> 
          </Trigger> 
         </ControlTemplate.Triggers> 
        </ControlTemplate> 
       </Setter.Value> 
      </Setter> 
     </Style> 

Merci à tous