如何从列表框到上下文菜单中获取选定的项目
[英]How to get selected Item from listbox to context menu
问题描述
So I know there are similar questions out there but I'm still confused and hope someone can help me. 
所以我知道那里也有类似的问题，但我仍然很困惑，希望有人能帮助我。 i had a listbox with the ability to select an item and it would add a property. 我有一个列表框，可以选择一个项目，它将添加一个属性。 I now have a context menu as the layout is exactly what I need but I'm struggling to make my click event work, currently I can't do anything with mine just now, but I have the code for the code behind on the list box to work, can someone help me with having the lsitbox click event work on the context menu please :)? 我现在有了一个上下文菜单，因为布局恰好是我所需要的，但是我正努力使我的click事件正常工作，目前我暂时无法对我做任何事情，但是我的代码清单上有后面的代码框工作，有人可以帮我在上下文菜单上使lsitbox click事件起作用:)？
private void Selector_OnSelectionChanged(object sender, SelectionChangedEventArgs e)
{
var listBox = sender as ListBox;
if (listBox.SelectedItems.Count == 0)
{
return;
}
var item = listBox.SelectedItems[0] as PropertyNode;
viewModel.AddPropertyNode(item);
}
Edit 编辑
Here is my XAML that I have with my context menu just now 这是我刚才在上下文菜单中使用的XAML
<DataTemplate x:Key="AddNodeTemplate">
<Border BorderThickness="1" Background="#F7F7F7">
<Border.BorderBrush>
<DrawingBrush Viewport="8,8,8,8" ViewportUnits="Absolute" TileMode="Tile">
<DrawingBrush.Drawing>
<DrawingGroup>
<GeometryDrawing Brush="#F7F7F7">
<GeometryDrawing.Geometry>
<GeometryGroup>
<RectangleGeometry Rect="0,0,50,50"/>
<RectangleGeometry Rect="50,50,50,50"/>
</GeometryGroup>
</GeometryDrawing.Geometry>
</GeometryDrawing>
</DrawingGroup>
</DrawingBrush.Drawing>
</DrawingBrush>
</Border.BorderBrush>
<StackPanel>
<Button x:Name="ButtonAdd" Click="ButtonAdd_Click" Height="30" Width="130" Tag="{Binding RelativeSource={RelativeSource AncestorType={x:Type syncfusion:Node}}}">
<Button.Style>
<Style TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid Background="#F7F7F7">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="25"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Image Source="Images/icon_plus.bmp" HorizontalAlignment="Left" Margin="5,0,0,0"/>
<TextBlock Text="Add Property" HorizontalAlignment="Center" Grid.Column="1" VerticalAlignment="Center" Foreground="LightGray" FontStyle="Italic" FontSize="12"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="Background" Value="#F7F7F7"/>
</Style>
</Button.Style>
<Button.ContextMenu>
<ContextMenu>
<MenuItem Header="_Copy Existing" Icon="{StaticResource ImageCopy}" ItemsSource="{Binding Path=AvailableProperties}" Click="MenuItem_Click">
<MenuItem.Resources>
<Style TargetType="MenuItem">
<Style.Resources>
<Image x:Key="img" x:Shared="False" Width="12" Height="12" Source="{Binding Icon, Converter={StaticResource ImageToSourceConverter}}"
Margin="3" VerticalAlignment="Center"/>
<Style TargetType="ContentPresenter">
<Style.Triggers>
<Trigger Property="ContentSource" Value="Icon">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Image Source="{Binding}"/>
</DataTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</Style.Resources>
<Setter Property="Icon" Value="{Binding Icon, Converter={StaticResource ImageToSourceConverter}}"/>
<Style.Triggers>
<Trigger Property="Role" Value="SubMenuItem">
<Setter Property="HeaderTemplate">
<Setter.Value>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<ContentPresenter Content="{Binding Name}"/>
</StackPanel>
</DataTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</MenuItem.Resources>
</MenuItem>
<MenuItem Header="Upscale well logs"/>
<MenuItem Header="Upscale well_top attributes"/>
<MenuItem Header="Upscale point attributes" Icon="{StaticResource ImagePointSet}">
</MenuItem>
<MenuItem Header="Calculate"/>
</ContextMenu>
</Button.ContextMenu>
</Button>
</StackPanel>
</Border>
</DataTemplate>
Code behind for context menu, I know it's not much but this is as far as I can get 上下文菜单后面的代码，我知道虽然不多，但是据我所知
private void MenuItem_Click(object sender, RoutedEventArgs e)
{
var menuItem = sender as MenuItem;
}
Current output 电流输出
2 个解决方案
解决方案1
0 2015-10-19 15:21:39
Please verify that you've correctly linked your code in the XAML. 请验证您是否已正确链接XAML中的代码。 Something like: 就像是：
<ListView SelectionChanged="Selector_OnSelectionChanged">
I note that we don't see any of your wpf xaml code. 我注意到，我们看不到您的任何wpf xaml代码。 If this doesn't answer your question then it might help to add a glimpse of your xaml so we can identify why your Selector_OnSelectionChanged isn't being processed. 如果这不能解决您的问题，则可能有助于您了解一下xaml，以便我们确定为什么未处理您的Selector_OnSelectionChanged。
Thanks! 谢谢！
解决方案2
0 已采纳 2015-10-20 10:56:22
After much googling and asking around I found an answer and thought I post it for anyone who might have this problem also, just it's in the form of my problem, which should be easy enough to edit :) 经过大量的查询和询问后，我找到了答案，并认为我会将它发布给也有此问题的任何人，只是它以我的问题的形式出现，应该很容易编辑:)
<DataTemplate x:Key="AddNodeTemplate">
<Border BorderThickness="1" Background="#F7F7F7">
<Border.BorderBrush>
<DrawingBrush Viewport="8,8,8,8" ViewportUnits="Absolute" TileMode="Tile">
<DrawingBrush.Drawing>
<DrawingGroup>
<GeometryDrawing Brush="#F7F7F7">
<GeometryDrawing.Geometry>
<GeometryGroup>
<RectangleGeometry Rect="0,0,50,50"/>
<RectangleGeometry Rect="50,50,50,50"/>
</GeometryGroup>
</GeometryDrawing.Geometry>
</GeometryDrawing>
</DrawingGroup>
</DrawingBrush.Drawing>
</DrawingBrush>
</Border.BorderBrush>
<StackPanel>
<Button x:Name="ButtonAdd" Click="ButtonAdd_Click" Height="30" Width="130" Tag="{Binding RelativeSource={RelativeSource AncestorType={x:Type syncfusion:Node}}}">
<Button.Style>
<Style TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid Background="#F7F7F7">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="25"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Image Source="Images/icon_plus.bmp" HorizontalAlignment="Left" Margin="5,0,0,0"/>
<TextBlock Text="Add Property" HorizontalAlignment="Center" Grid.Column="1" VerticalAlignment="Center" Foreground="LightGray" FontStyle="Italic" FontSize="12"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="Background" Value="#F7F7F7"/>
</Style>
</Button.Style>
<Button.ContextMenu>
<ContextMenu>
<MenuItem Header="Copy Exisiting" ItemsSource="{Binding Path=AvailableProperties}" Click="AddExistingProperty_OnClick" Icon="Images/Copy.bmp" FontFamily="MS Reference Sans Serif">
<MenuItem.Resources>
<Style TargetType="MenuItem">
<Style.Resources>
<Image x:Key="img" x:Shared="False" Width="10" Height="10" Source="{Binding Icon, Converter={StaticResource ImageToSourceConverter}}"
Margin="3" VerticalAlignment="Center"/>
<Style TargetType="ContentPresenter">
<Style.Triggers>
<Trigger Property="ContentSource" Value="Icon">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Image Source="{Binding}"/>
</DataTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</Style.Resources>
<Setter Property="Icon" Value="{Binding Icon, Converter={StaticResource ImageToSourceConverter}}"/>
<Style.Triggers>
<Trigger Property="Role" Value="SubMenuItem">
<Setter Property="HeaderTemplate">
<Setter.Value>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<ContentPresenter Content="{Binding Name}"/>
</StackPanel>
</DataTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</MenuItem.Resources>
</MenuItem>
<MenuItem Header="Upscale well logs" Click="AddProperty_OnClick" Tag="UpscaleWellLogs" Style="{StaticResource MenuItemIcon}" Icon="Images/WellLogs.png" FontFamily="MS Reference Sans Serif"/>
<MenuItem Header="Upscale well top attributes" Click="AddProperty_OnClick" Tag="UpscaleWellTopAttributes" Style="{StaticResource MenuItemIcon}" Icon="Images/WellTop.png" FontFamily="MS Reference Sans Serif"/>
<MenuItem Header="Upscale point attributes" Click="AddProperty_OnClick" Tag="UpscalePointAttributes" Style="{StaticResource MenuItemIcon}" Icon="Images/PointSet.png" FontFamily="MS Reference Sans Serif"/>
<MenuItem Header="Calculate" Click="AddProperty_OnClick" Tag="Calculate" Style="{StaticResource MenuItemIcon}" Icon="Images/calculator.png" FontFamily="MS Reference Sans Serif"/>
</ContextMenu>
</Button.ContextMenu>
</Button>
</StackPanel>
</Border>
</DataTemplate>
private void AddExistingProperty_OnClick(object sender, RoutedEventArgs e)
{
var menuItem = e.OriginalSource as MenuItem;
var item = menuItem.DataContext as PropertyNode;
viewModel.AddPropertyNode(item);
}
private void AddProperty_OnClick(object sender, RoutedEventArgs e)
{
if (MenuItemActivated != null)
{
var menuItem = sender as MenuItem;
var command = menuItem.Tag as CognitiveTreeMenuCommand?;
if (command.HasValue)
{
MenuItemActivated(this, new MenuItemEventHandlerArgs() { Command = command.Value });
}
}
}
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