c#wpf在单击项目旁边的toggleswitch(treearrow)时获取TreeView项目的名称(或标记)
我有一个树视图,它加载2个子文件夹级别。当我单击一个TreeView项目时,会调用一个方法,从该路径加载2个子文件夹级别。问题是,当单击此项旁边的treearrow/toggleswitch加载子文件夹时,我必须调用相同的方法。因此,我需要在单击treearrow对象时使用该项的标记来生成目录信息对象。我将单击事件应用于toggleswitchc#wpf在单击项目旁边的toggleswitch(treearrow)时获取TreeView项目的名称(或标记),c#,wpf,wpf-controls,C#,Wpf,Wpf Controls,我有一个树视图,它加载2个子文件夹级别。当我单击一个TreeView项目时,会调用一个方法,从该路径加载2个子文件夹级别。问题是,当单击此项旁边的treearrow/toggleswitch加载子文件夹时,我必须调用相同的方法。因此,我需要在单击treearrow对象时使用该项的标记来生成目录信息对象。我将单击事件应用于toggleswitch <Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
<Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
<Setter Property="Focusable" Value="False"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Grid Width="15"
Height="13"
Background="Transparent">
<Path x:Name="ExpandPath"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Margin="1,1,1,1"
Fill="{StaticResource GlyphBrush}"
Data="M 4 0 L 8 4 L 4 8 Z"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked"
Value="True">
<Setter Property="Data"
TargetName="ExpandPath"
Value="M 0 4 L 8 4 L 4 8 Z"/>
</Trigger>
<Trigger Property="IsPressed" Value="true">
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="TreeViewItemFocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Border>
<Rectangle Margin="0,0,0,0"
StrokeThickness="5"
Stroke="Black"
StrokeDashArray="1 2"
Opacity="0"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="{x:Type TreeViewItem}" TargetType="{x:Type TreeViewItem}">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="HorizontalContentAlignment" Value="{Binding Path=HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="VerticalContentAlignment" Value="{Binding Path=VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="Padding" Value="1,0,0,0"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="FocusVisualStyle" Value="{StaticResource TreeViewItemFocusVisual}"/>
<Setter Property="FontSize" Value="15"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TreeViewItem}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="19" Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition/>
</Grid.RowDefinitions>
<ToggleButton x:Name="Expander"
IsChecked="{Binding Path=IsExpanded, RelativeSource={RelativeSource TemplatedParent}}"
ClickMode="Press"
Style="{StaticResource ExpandCollapseToggleStyle}"
Click="onTreeArrowClick"
/>
<Border Name="Bd"
Grid.Column="1"
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.Column="1"
Grid.ColumnSpan="2"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsExpanded" Value="false">
<Setter TargetName="ItemsHost" Property="Visibility" Value="Collapsed"/>
</Trigger>
<Trigger Property="HasItems" Value="false">
<Setter TargetName="Expander" Property="Visibility" Value="Hidden"/>
</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="Bd" Property="Background" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="IsSelectionActive" Value="false"/>
</MultiTrigger.Conditions>
<Setter TargetName="Bd" Property="Background" Value="Transparent"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
</MultiTrigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
假设您可以访问
单击事件中的切换按钮
,则需要找到其类型为树视图项
的父项。我创建了一个扩展方法来为我实现这一点。。。如果愿意,可以将其编辑为普通方法,或者将其放入静态类中(扩展方法需要位于静态类中):
公共静态T GetParentOfType(此DependencyObject元素)
其中T:DependencyObject
{
类型=类型(T);
if(element==null)返回null;
DependencyObject parent=VisualTreeHelper.GetParent(元素);
if(parent==null&((FrameworkElement)元素)。parent是DependencyObject)
父元素=((FrameworkElement)元素);
if(parent==null)返回null;
else if(parent.GetType()==type | | parent.GetType().IsSubclassOf(type))
将父对象返回为T;
返回GetParentOfType(父级);
}
使用此作为扩展方法,您可以这样调用它:
TreeViewItem treeViewItem = toggleButton.GetParentOfType<TreeViewItem>();
TreeViewItem TreeViewItem=toggleButton.GetParentOfType();
TreeViewItem treeViewItem = toggleButton.GetParentOfType<TreeViewItem>();