WPF C# TreeView获取所选项目的文本

Question

我有如下的TreeView：

<TreeView x:Name="TreeView" 
                  MouseDoubleClick="TreeView_MouseDoubleClick"
                  Width="350">
            <TreeViewItem IsExpanded="True">
                <TreeViewItem.Header>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="CogOutline" Margin="0 0 5 0"/>
                        <TextBlock Text="Configuration" FontWeight="Bold"/>
                    </StackPanel>
                </TreeViewItem.Header>
                <TreeViewItem IsExpanded="True">
                    <TreeViewItem.Header>
                        <StackPanel Orientation="Horizontal">
                            <materialDesign:PackIcon Kind="TruckDeliveryOutline" Margin="0 0 5 0"/>
                            <TextBlock Text="Items"/>
                        </StackPanel>
                    </TreeViewItem.Header>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="ArrowUpBoldBoxOutline" Margin="0 0 5 0"/>
                        <TextBlock Text="Configuration"/>
                    </StackPanel>
                </TreeViewItem>
                <TreeViewItem IsExpanded="True">
                    <TreeViewItem.Header>
                        <StackPanel Orientation="Horizontal">
                            <materialDesign:PackIcon Kind="FileDocumentOutline" Margin="0 0 5 0"/>
                            <TextBlock Text="List"/>
                        </StackPanel>
                    </TreeViewItem.Header>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="ClipboardMultipleOutline" Margin="0 0 5 0"/>
                        <TextBlock Text="Management"/>
                    </StackPanel>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="ClipboardListOutline" Margin="0 0 5 0"/>
                        <TextBlock Text="Management"/>
                    </StackPanel>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="ClipboardPlusOutline" Margin="0 0 5 0"/>
                        <TextBlock Text="Sundry Items"/>
                    </StackPanel>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="RelationOneToMany" Margin="0 0 5 0"/>
                        <TextBlock Text="Sundry Addition"/>
                    </StackPanel>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="ClipboardPlusOutline" Margin="0 0 5 0"/>
                        <TextBlock Text="Sundry Addition"/>
                    </StackPanel>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="RelationOneToMany" Margin="0 0 5 0"/>
                        <TextBlock Text="Addition Relations"/>
                    </StackPanel>
                </TreeViewItem>
            </TreeViewItem>
            <TreeViewItem IsExpanded="True">
                <TreeViewItem.Header>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="FormatListBulleted" Margin="0 0 5 0"/>
                        <TextBlock Text="Tasks" FontWeight="Bold"/>
                    </StackPanel>
                </TreeViewItem.Header>
                <TreeViewItem IsExpanded="True">
                    <TreeViewItem.Header>
                        <StackPanel Orientation="Horizontal">
                            <materialDesign:PackIcon Kind="TruckDeliveryOutline" Margin="0 0 5 0"/>
                            <TextBlock Text="Items"/>
                        </StackPanel>
                    </TreeViewItem.Header>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="ChartFinance" Margin="0 0 5 0"/>
                        <TextBlock Text="(Converted)"/>
                    </StackPanel>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="ChartFinance" Margin="0 0 5 0"/>
                        <TextBlock Text="(Each)"/>
                    </StackPanel>
                </TreeViewItem>
                <TreeViewItem>
                    <TreeViewItem.Header>
                        <StackPanel Orientation="Horizontal">
                            <materialDesign:PackIcon Kind="CurrencyGbp" Margin="0 0 5 0"/>
                            <TextBlock Text="Material"/>
                        </StackPanel>
                    </TreeViewItem.Header>
                </TreeViewItem>
                <TreeViewItem IsExpanded="True">
                    <TreeViewItem.Header>
                        <StackPanel Orientation="Horizontal">
                            <materialDesign:PackIcon Kind="CurrencyGbp" Margin="0 0 5 0"/>
                            <TextBlock Text="Product"/>
                        </StackPanel>
                    </TreeViewItem.Header>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="Check" Margin="0 0 5 0"/>
                        <TextBlock Text="Validation"/>
                    </StackPanel>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="Update" Margin="0 0 5 0"/>
                        <TextBlock Text="Update All"/>
                    </StackPanel>
                </TreeViewItem>
                <TreeViewItem>
                    <TreeViewItem.Header>
                        <StackPanel Orientation="Horizontal">
                            <materialDesign:PackIcon Kind="Salesforce" Margin="0 0 5 0"/>
                            <TextBlock Text="Bundle"/>
                        </StackPanel>
                    </TreeViewItem.Header>
                </TreeViewItem>
                <TreeViewItem>
                    <TreeViewItem.Header>
                        <StackPanel Orientation="Horizontal">
                            <materialDesign:PackIcon Kind="Calculator" Margin="0 0 5 0"/>
                            <TextBlock Text="Calculator"/>
                        </StackPanel>
                    </TreeViewItem.Header>
                </TreeViewItem>
            </TreeViewItem>
                <TreeViewItem IsExpanded="True">
                    <TreeViewItem.Header>
                        <StackPanel Orientation="Horizontal">
                            <materialDesign:PackIcon Kind="HelpCircleOutline" Margin="0 0 5 0"/>
                            <TextBlock Text="Help" FontWeight="Bold"/>
                        </StackPanel>
                    </TreeViewItem.Header>
                    <StackPanel Orientation="Horizontal">
                        <materialDesign:PackIcon Kind="BookOpenOutline" Margin="0 0 5 0"/>
                        <TextBlock Text="Guide"/>
                    </StackPanel>
                </TreeViewItem>
                <TreeViewItem>
                    <TreeViewItem.Header>
                        <StackPanel Orientation="Horizontal">
                            <materialDesign:PackIcon Kind="Link" Margin="0 0 5 0"/>
                            <TextBlock Text="Link"/>
                        </StackPanel>
                    </TreeViewItem.Header>
                </TreeViewItem>
            
        </TreeView>

它将用作菜单表单中的导航，但我正在努力创建一个事件，该事件将在单击某些内容时触发，然后返回树视图中项目上显示的文本值。

我尝试了以下文章：

Getting the value of the Selected Child Nodes on click Event in WPF TreeView

How to add WPF treeView Node Click event to get the node value

使用这两种方法的解决方案对我都不起作用，因为在其中一种情况下，我无法访问item.header，而在其他情况下，它似乎无法正确地创建TreeViewItem item = sender as TreeViewItem。

我是否将硬编码的TreeView过于复杂，以至于无法创建这样的事件来返回单击项目的文本值？

Answer 1

您可以为每个TreeViewItem指定Tag属性。在MouseClick事件处理程序->中，您可以将发送方转换为TreeViewItem。然后你就可以获取它的标签属性了

<TreeViewItem Tag="Link" MouseLeftButtonDown="ClickItem_Handler">
 ...
</TreeViewItem>

在窗体后面的代码中

protected void ClickItem_Handler(object sender, MouseEventArgs args)
{
    if (sender is TreeViewItem item){
        var header = item.Tag as string;
    }
}