C# 当我选择一个新的treeviewitem时，WPF Items控件重置被选择为false

我扩展了

ItemsControl

以允许

MultiSelection

我将数据

OneWayToSource

绑定到viewmodel

        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>

根据鼠标事件，所有容器的

IsSelected

属性都设置为true

        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>

我看到数据从容器传播到viewmodel，并且

IsSelected

更新。 当我单步执行代码时，在

PropertyChanged

上完成后，它会立即执行 再次运行setter，将属性设置回false。我对正在发生的事感到很困惑。在将属性重置回false之前，它将逐步执行此非用户代码

        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>

单步执行：单步执行非用户代码“System.ComponentModel.PropertyChangedEventArgs.PropertyChangedEventArgs”
单步执行：单步执行非用户代码“MS.Internal.Data.PropertyPathWorker.GetValue”
单步执行：单步执行非用户代码“MS.Internal.Data.PropertyPathWorker.RawValue”
单步执行：单步执行非用户代码“MS.Internal.Data.PropertyPathWorker.RawValue”
单步执行：单步执行非用户代码“MS.Internal.Data.ClrBindingWorker.RawValue”
单步执行：单步执行非用户代码“System.Windows.Data.BindingExpression.TransferValue”

        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>

我发誓我从来都不记得在这篇帖子里说什么。我正在扩展items控件以生成一个多选树视图。事实上，我大部分时间只是使用别人的代码，并对其进行了修改以允许键盘导航

        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>

        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>

5.

        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>

---

无论如何，我最终会弄明白的。我想我记得默认的wpf树视图不允许multiselect，如果您试图在多个树视图项上设置isselected，那么实际上取消选择所有项，所以我想知道itemscontrol是否有这种行为，即使通用itemscontrol干扰选择是没有意义的。不确定发生了什么，但我最终会弄清楚。

项目控件不允许任何设计选择，因此我不知道当
项目控件
选择项目时，
IsSelected
被更改是什么意思。那东西一点也选不上

        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>

此外，如果需要多选行为，可以使用
ListBox
并将
SelectionMode
更改为
多个
或
扩展

        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>

请查看此链接：

        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>

终于找到了。只是一个愚蠢的地方，我又错了一套装订。交互绑定会导致奇怪的行为。最有可能的是一个更新触发了一个循环，再次关闭它

        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>

对不起，我把这么多人的时间浪费在愚蠢的问题上了。但通常我只是想确认事情是按照我认为的方式进行的。当我的代码不起作用时，我对任何东西都没有信心
出于好奇，您是否尝试更改
=零件？我也很好奇；你能发布你的
IsSelected
绑定吗？
        <Rectangle
                   x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                   StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
          <Rectangle.StrokeDashArray>
            <sys:Double>5</sys:Double>
          </Rectangle.StrokeDashArray>
        </Rectangle>
        <Border Name="Bd"
                  Background="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}"
                  Padding="{TemplateBinding Padding}"
                  >
          <ContentPresenter x:Name="PART_Header"
                              ContentSource="Header"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              />
        </Border>
        <ItemsPresenter 
          x:Name="ItemsHost"
          Grid.Row="1"
          />
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsExpanded" Value="false">
          <Setter TargetName="ItemsHost"
                    Property="Visibility"
                    Value="Collapsed"
                    />
        </Trigger>

        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
               Value="false"/>
            <Condition Property="Width"
               Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinWidth"
                    Value="75"
                    />
        </MultiTrigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="HasHeader"
                       Value="false"/>
            <Condition Property="Height"
                       Value="Auto"/>
          </MultiTrigger.Conditions>
          <Setter TargetName="PART_Header"
                    Property="MinHeight"
                    Value="19"/>
        </MultiTrigger>
        <Trigger Property="IsSelected"
                   Value="true">
          <Setter TargetName="ItemMainGrid"
                    Property="Background"
                    Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
        </Trigger>
        <MultiTrigger>
          <MultiTrigger.Conditions>
            <Condition Property="IsOutlined"
                       Value="true" 
                       />
            <Condition Property="IsSelected"
                       Value="false" 
                       />
          </MultiTrigger.Conditions>
         <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
        </MultiTrigger>        
        <Trigger Property="IsOutlined"
                   Value="false">
          <Setter TargetName="Rectangle" Property="StrokeThickness" Value="0" />
        </Trigger>
        <Trigger Property="IsEnabled"
                   Value="false">
          <Setter Property="Foreground"
                    Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>