查找树型视图从文本菜单绑定项目 [英] Find Bound Item from TreeViewItem from ContextMenu
本文介绍了查找树型视图从文本菜单绑定项目的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有这样的树视图，看起来像这样：
＆LT; TreeView控件
Grid.Column =0
Grid.Row =2
了minHeight =100
了minWidth =100
BorderBrush =白
的DataContext ={结合项目，源= {X：静态SizingApp：Manager.Instance}}＆GT;
＆LT; TreeView.Resources＆GT;
＆LT;风格的TargetType =树型视图＆GT;
＆LT; setter属性=IsExpandedVALUE =真/＆GT;
＆LT; /样式和GT;
＆LT;的DataTemplate X：键=LoadTemplate＆GT;
＆LT; TextBlock的文本={绑定名称}＆GT;
＆LT; TextBlock.ContextMenu＆GT;
＆LT;＆文本菜单GT;
＆LT;菜单项InputGestureText ={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Edit_InputGestureText}\">
＆LT; MenuItem.Header＆GT;
＆LT; TextBlock的文本={绑定路径=名称，
的StringFormat = {RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= load_ContextMenu_Edit_Header}}/＆GT;
＆LT; /MenuItem.Header>
＆LT; /菜单项＆GT;
＆LT;＆菜单项GT;
＆LT; MenuItem.Header＆GT;
＆LT; TextBlock的文本={绑定路径=名称，
的StringFormat = {RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= load_ContextMenu_Save_Header}}/＆GT;
＆LT; /MenuItem.Header>
＆LT; /菜单项＆GT;
＆LT;＆菜单项GT;
＆LT; MenuItem.Header＆GT;
＆LT; TextBlock的文本={绑定路径=名称，
的StringFormat = {RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= load_ContextMenu_Export_Header}}/＆GT;
＆LT; /MenuItem.Header>
＆LT; /菜单项＆GT;
＆LT;菜单项标题={RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= load_ContextMenu_Copy_Header}
InputGestureText ={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Copy_InputGestureText}\"/>
＆LT;菜单项InputGestureText ={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Remove_InputGestureText}\">
＆LT; MenuItem.Header＆GT;
＆LT; TextBlock的文本={绑定路径=名称，
的StringFormat = {RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= load_ContextMenu_Remove_Header}}/＆GT;
＆LT; /MenuItem.Header>
＆LT; /菜单项＆GT;
＆LT; /文本菜单＆GT;
＆LT; /TextBlock.ContextMenu>
＆LT; / TextBlock的＆GT;
＆LT; / DataTemplate中＆GT;
＆LT; HierarchicalDataTemplate X：键=StepTemplate
的ItemsSource ={结合负载}
的ItemTemplate ={StaticResource的LoadTemplate}＆GT;
＆LT; TextBlock的文本={绑定名称}＆GT;
＆LT; TextBlock.ContextMenu＆GT;
＆LT;＆文本菜单GT;
＆LT;菜单项InputGestureText ={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Edit_InputGestureText}\">
＆LT; MenuItem.Header＆GT;
＆LT; TextBlock的文本={绑定路径=名称，
的StringFormat = {RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= step_ContextMenu_Edit_Header}}/＆GT;
＆LT; /MenuItem.Header>
＆LT; /菜单项＆GT;
＆LT;菜单项标题={RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= step_ContextMenu_Copy_Header}
InputGestureText ={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Copy_InputGestureText}\" /＆GT;
＆LT;菜单项标题={RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= step_ContextMenu_Paste_Header}
InputGestureText ={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Paste_InputGestureText}\" /＆GT;
＆LT;菜单项标题={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Import_Load_Header}\" /＆GT;
＆LT;＆菜单项GT;
＆LT; MenuItem.Header＆GT;
＆LT; TextBlock的文本={绑定路径=名称，
的StringFormat = {RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= step_ContextMenu_Export_Header}}/＆GT;
＆LT; /MenuItem.Header>
＆LT; /菜单项＆GT;
＆LT;菜单项InputGestureText ={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Remove_InputGestureText}\">
＆LT; MenuItem.Header＆GT;
＆LT; TextBlock的文本={绑定路径=名称，
的StringFormat = {RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= step_ContextMenu_Remove_Header}}/＆GT;
＆LT; /MenuItem.Header>
＆LT; /菜单项＆GT;
＆LT;菜单项标题={RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= step_ContextMenu_Add_Load_Header}
的ItemsSource ={StaticResource的mnuLoadSubmenuCommon}/＆GT;
＆LT; /文本菜单＆GT;
＆LT; /TextBlock.ContextMenu>
＆LT; / TextBlock的＆GT;
＆LT; / HierarchicalDataTemplate＆GT;
＆LT; HierarchicalDataTemplate X：键=ProjectTemplate
的ItemsSource ={结合步骤}
的ItemTemplate ={StaticResource的StepTemplate}＆GT;
＆LT; TextBlock的文本={绑定名称}＆GT;
＆LT; TextBlock.ContextMenu＆GT;
＆LT;＆文本菜单GT;
＆LT;菜单项InputGestureText ={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Edit_InputGestureText}\"
点击=EditProject_Click＆GT;
＆LT; MenuItem.Header＆GT;
＆LT; TextBlock的文本={绑定路径=名称，
的StringFormat = {RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= project_ContextMenu_Edit_Header}}/＆GT;
＆LT; /MenuItem.Header>
＆LT; /菜单项＆GT;
＆LT;＆菜单项GT;
＆LT; MenuItem.Header＆GT;
＆LT; TextBlock的文本={绑定路径=名称，
的StringFormat = {RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= project_ContextMenu_Save_Header}}/＆GT;
＆LT; /MenuItem.Header>
＆LT; /菜单项＆GT;
＆LT;菜单项标题={RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= project_ContextMenu_Copy_Header}
InputGestureText ={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Copy_InputGestureText}\" /＆GT;
＆LT;菜单项标题={RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= project_ContextMenu_Paste_Header}
InputGestureText ={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Paste_InputGestureText}\" /＆GT;
＆LT;菜单项InputGestureText ={RESX ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Remove_InputGestureText}\">
＆LT; MenuItem.Header＆GT;
＆LT; TextBlock的文本={绑定路径=名称，
的StringFormat = {RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= project_ContextMenu_Remove_Header}}/＆GT;
＆LT; /MenuItem.Header>
＆LT; /菜单项＆GT;
＆LT;菜单项标题={RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= projectTree_Project_AddStep_Header}/＆GT;
＆LT;菜单项标题={RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= projectTree_Project_ImportStep_Header}/＆GT;
＆LT; /文本菜单＆GT;
＆LT; /TextBlock.ContextMenu>
＆LT; / TextBlock的＆GT;
＆LT; / HierarchicalDataTemplate＆GT;
＆LT; /TreeView.Resources>
＆LT;树型视图
标题={RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= projectTree_Header}
的ItemsSource ={结合}
IsExpanded =真
的ItemTemplate ={StaticResource的ProjectTemplate}＆GT;
＆LT; TreeViewItem.ContextMenu＆GT;
＆LT;＆文本菜单GT;
＆LT;菜单项标题={RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= projectTree_Paste_Header}
InputGestureText ={RESX ResxName = PSSPECApplication.Controls.ProjectControlResources，重点= projectTree_Paste_InputGestureText}/＆GT;
＆LT; /文本菜单＆GT;
＆LT; /TreeViewItem.ContextMenu>
＆LT; /树型视图＆GT;
＆LT; / TreeView的＆GT;
这是我的单击事件
私人无效EditProject_Click（对象发件人，RoutedEventArgs E）
{
//我怎么找到这个上下文菜单中驻留的节点的绑定项？
}
我试图写的文本菜单菜单项单击事件EditProject_Click事件。当我点击它，我希望能够找到绑定到上下文菜单所在的节点的项目。我该怎么做呢？
答案
私人无效EditProject_Click（对象发件人，RoutedEventArgs E）
{
项目项目=（项目）（（菜单项）发送方）.DataContext; //做的东西与项目在这里
}
另外，如果你想获得你的文本菜单来更新它的DataContext从文本菜单是假设连接到的元素，这里是该语法：
＆LT;文本菜单的DataContext ={结合PlacementTarget.DataContext，的RelativeSource = {自我的RelativeSource}}＆GT;
解决方案
在单击事件处理程序，将（发件人为FrameworkElement的）.DataContext是你在找什么？
编辑：
下面的示例code。
XAML：
＆LT;窗口x：类=WpfApplication3.MainWindow
的xmlns =http://schemas.microsoft.com/winfx/2006/xaml/$p$psentation
的xmlns：X =http://schemas.microsoft.com/winfx/2006/xaml
的xmlns：V =CLR的命名空间：WpfApplication3
标题=主窗口HEIGHT =350WIDTH =525＆GT;
＆LT; Window.Resources＆GT;
＆LT;的DataTemplate X：键=模板＆GT;
＆LT; TextBlock的文本={结合}＆GT;
＆LT; TextBlock.ContextMenu＆GT;
＆LT;＆文本菜单GT;
＆LT;菜单项标题=测试点击=MenuItem_Click/＆GT;
＆LT; /文本菜单＆GT;
＆LT; /TextBlock.ContextMenu>
＆LT; / TextBlock的＆GT;
＆LT; / DataTemplate中＆GT;
＆LT; /Window.Resources>
＆LT;＆DockPanel中GT;
＆LT;按钮DockPanel.Dock =评出的点击=Button_Click＆GT;变化语境下，/按钮＆GT; ＆LT; TreeView的X：名称=TV的ItemTemplate ={StaticResource的模板}/＆GT; ＆LT; / DockPanel中＆GT;＆LT; /窗GT;
code-背后：
公共部分类主窗口：窗口
{
布尔标志= FALSE;
公共主窗口（）
{
的InitializeComponent（）;
列表列表=新名单（）{A，B，C，D};
this.tv.ItemsSource =清单;
}
私人无效MenuItem_Click（对象发件人，RoutedEventArgs E）
{
MessageBox.Show（（发件人为菜单项）.DataContext.ToString（））;
}
私人无效Button_Click（对象发件人，RoutedEventArgs E）
{
如果（标志）
{
列表列表=新名单（）{A，B，C，D};
this.tv.ItemsSource =清单;
}
其他
{
列表列表=新列表（）{1，2，3，4};
this.tv.ItemsSource =清单;
}
标志=标志！;
}} I have this Tree View that looks like this:
<TreeView
Grid.Column="0"
Grid.Row="2"
MinHeight="100"
MinWidth="100"
BorderBrush="White"
DataContext="{Binding Projects, Source={x:Static SizingApp:Manager.Instance}}">
<TreeView.Resources>
<Style TargetType="TreeViewItem">
<Setter Property="IsExpanded" Value="True" />
</Style>
<DataTemplate x:Key="LoadTemplate">
<TextBlock Text="{Binding Name}">
<TextBlock.ContextMenu>
<ContextMenu>
<MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Edit_InputGestureText}">
<MenuItem.Header>
<TextBlock Text="{Binding Path=Name,
StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Edit_Header}}" />
</MenuItem.Header>
</MenuItem>
<MenuItem>
<MenuItem.Header>
<TextBlock Text="{Binding Path=Name,
StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Save_Header}}" />
</MenuItem.Header>
</MenuItem>
<MenuItem>
<MenuItem.Header>
<TextBlock Text="{Binding Path=Name,
StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Export_Header}}" />
</MenuItem.Header>
</MenuItem>
<MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Copy_Header}"
InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Copy_InputGestureText}"/>
<MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Remove_InputGestureText}">
<MenuItem.Header>
<TextBlock Text="{Binding Path=Name,
StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Remove_Header}}" />
</MenuItem.Header>
</MenuItem>
</ContextMenu>
</TextBlock.ContextMenu>
</TextBlock>
</DataTemplate>
<HierarchicalDataTemplate x:Key="StepTemplate"
ItemsSource="{Binding Loads}"
ItemTemplate="{StaticResource LoadTemplate}">
<TextBlock Text="{Binding Name}">
<TextBlock.ContextMenu>
<ContextMenu>
<MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Edit_InputGestureText}">
<MenuItem.Header>
<TextBlock Text="{Binding Path=Name,
StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Edit_Header}}" />
</MenuItem.Header>
</MenuItem>
<MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Copy_Header}"
InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Copy_InputGestureText}" />
<MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Paste_Header}"
InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Paste_InputGestureText}" />
<MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Import_Load_Header}" />
<MenuItem>
<MenuItem.Header>
<TextBlock Text="{Binding Path=Name,
StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Export_Header}}" />
</MenuItem.Header>
</MenuItem>
<MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Remove_InputGestureText}">
<MenuItem.Header>
<TextBlock Text="{Binding Path=Name,
StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Remove_Header}}" />
</MenuItem.Header>
</MenuItem>
<MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Add_Load_Header}"
ItemsSource="{StaticResource mnuLoadSubmenuCommon}"/>
</ContextMenu>
</TextBlock.ContextMenu>
</TextBlock>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate x:Key="ProjectTemplate"
ItemsSource="{Binding Steps}"
ItemTemplate="{StaticResource StepTemplate}">
<TextBlock Text="{Binding Name}">
<TextBlock.ContextMenu>
<ContextMenu>
<MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Edit_InputGestureText}"
Click="EditProject_Click">
<MenuItem.Header>
<TextBlock Text="{Binding Path=Name,
StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Edit_Header}}" />
</MenuItem.Header>
</MenuItem>
<MenuItem>
<MenuItem.Header>
<TextBlock Text="{Binding Path=Name,
StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Save_Header}}" />
</MenuItem.Header>
</MenuItem>
<MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Copy_Header}"
InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Copy_InputGestureText}" />
<MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Paste_Header}"
InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Paste_InputGestureText}" />
<MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Remove_InputGestureText}">
<MenuItem.Header>
<TextBlock Text="{Binding Path=Name,
StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Remove_Header}}" />
</MenuItem.Header>
</MenuItem>
<MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources, Key=projectTree_Project_AddStep_Header}" />
<MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources, Key=projectTree_Project_ImportStep_Header}" />
</ContextMenu>
</TextBlock.ContextMenu>
</TextBlock>
</HierarchicalDataTemplate>
</TreeView.Resources>
<TreeViewItem
Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources, Key=projectTree_Header}"
ItemsSource="{Binding}"
IsExpanded="True"
ItemTemplate="{StaticResource ProjectTemplate}">
<TreeViewItem.ContextMenu>
<ContextMenu>
<MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources, Key=projectTree_Paste_Header}"
InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources, Key=projectTree_Paste_InputGestureText}" />
</ContextMenu>
</TreeViewItem.ContextMenu>
</TreeViewItem>
</TreeView>
And here is my click event
private void EditProject_Click(object sender, RoutedEventArgs e)
{
//how do I find the bound item of the node this context menu resides on?
}
I am trying to write the EditProject_Click event for the ContextMenu MenuItem click event. When I click it, I want to be able to find the item Bound to the node that the context menu resides. How do I do that?
The answer
private void EditProject_Click(object sender, RoutedEventArgs e)
{
Project project = (Project)((MenuItem)sender).DataContext;
//Do stuff with the project here
}
Also, if you want to get your ContextMenu to update it's DataContext from the element the ContextMenu is suppose to be attached to, here is the syntax for that:
<ContextMenu DataContext="{Binding PlacementTarget.DataContext, RelativeSource={RelativeSource Self}}">
解决方案
In the click event handler, would "(sender as FrameworkElement).DataContext" be what you're looking for?
EDIT:
Sample code below.
XAML:
<Window x:Class="WpfApplication3.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:v="clr-namespace:WpfApplication3"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<DataTemplate x:Key="template">
<TextBlock Text="{Binding}">
<TextBlock.ContextMenu>
<ContextMenu>
<MenuItem Header="Test" Click="MenuItem_Click"/>
</ContextMenu>
</TextBlock.ContextMenu>
</TextBlock>
</DataTemplate>
</Window.Resources>
<DockPanel>
<Button DockPanel.Dock="Top" Click="Button_Click">Change Context</Button>
<TreeView x:Name="tv" ItemTemplate="{StaticResource template}"/>
</DockPanel>
</Window>
Code-behind:
public partial class MainWindow : Window
{
bool flag = false;
public MainWindow()
{
InitializeComponent();
List list = new List() { "A", "B", "C", "D" };
this.tv.ItemsSource = list;
}
private void MenuItem_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show((sender as MenuItem).DataContext.ToString());
}
private void Button_Click(object sender, RoutedEventArgs e)
{
if (flag)
{
List list = new List() { "A", "B", "C", "D" };
this.tv.ItemsSource = list;
}
else
{
List list = new List() { 1, 2, 3, 4 };
this.tv.ItemsSource = list;
}
flag = !flag;
}
}
这篇关于查找树型视图从文本菜单绑定项目的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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