带Caliburn.Micro的WPF动态上下文菜单

问题描述

我正在尝试在基于Caliburn.Micro的应用程序中创建动态上下文菜单。任何人都可以分享一个有效的方法示例吗？
到目前为止，我对每个上下文菜单项都有一个非常小的模型：

I am trying to create a dynamic context menu in my Caliburn.Micro based application. Can anyone share an example of an effective way to do that?So far, I have a very minimal model for each context menu item:

public class ContextMenuUiModel
{
    public string Name { get; set; }
}

我的视图模型中的一个属性，显示这些菜单项模型的列表：

a property in my view model that presents a list of those menu item models:

      BindableCollection<ContextMenuUiModel> m_ContextMenuItems = new BindableCollection<ContextMenuUiModel>
  {
     new ContextMenuUiModel { Name="Item 1"},
     new ContextMenuUiModel { Name="Item 2"},
     new ContextMenuUiModel { Name="Item 3"}
  };
  public BindableCollection<ContextMenuUiModel> ContextMenuItems
  {
     get {return m_ContextMenuItems;}
  }

以及一个以集合属性命名的菜单项（基于FreePIE中的菜单创建，可通过）

and, a menu item named for the collection property (based on the menu creation in FreePIE, found via this question and answer)

         <TreeView  x:Name="ConfigItemTree" VerticalAlignment="Top" ItemsSource="{Binding ConfigTreeRoot}" >
           <TreeView.ContextMenu>
             <ContextMenu >
                <MenuItem x:Name="ContextMenuItems" DisplayMemberPath="Name" />
             </ContextMenu>
         </TreeView.ContextMenu>

Caliburn.Microloging报告 get_ContextMenuItems没有可操作元素。同样，尽管Caliburn注意没有找到其属性的其他命名元素（例如，未应用绑定约定：Element ConfigItemTree与属性不匹配。），但它并未对ContextMenuItems做出类似声明。因此，看来Caliburn只是没有将ContextMenu视为可以或应该处理的元素。

Caliburn.Micro logging reports "No actionable element for get_ContextMenuItems". Also, although Caliburn is noting other named elements for which no property was found (e.g. "Binding Convention Not Applied: Element ConfigItemTree did not match a property."), it is not making a similar statement for ContextMenuItems. So, it seems Caliburn is just not seeing the ContextMenu as an element it could or should deal with.

也许问题在于Caliburn无法看到上下文菜单，因为它只有在右键单击后才真正存在（类似于）？

Maybe the issue is that Caliburn can't see the context menu because it doesn't actually exist until a right click happens (similar to this issue with collapsed elements)?

最终，我希望上下文菜单的内容基于右键单击的树视图项目，可能包括子菜单和/或禁用的物品。不过，起初，我会满足于可获得的所有物品。

Ultimately, I would like the context menu's contents to be based on the tree view item that was right clicked, possibly including sub menus and/or disabled items. For a start, though, I'll settle for whatever items I can get.

推荐答案

绑定 ContextMenu 的I​​temsSource 属性到 ContextMenuItems 属性的

Bind the ItemsSource property of the ContextMenu to the ContextMenuItems property:

<ContextMenu ItemsSource="{Binding PlacementTarget.DataContext.ContextMenuItems, RelativeSource={RelativeSource Self}}" 
             DisplayMemberPath="Name" />

这篇关于带Caliburn.Micro的WPF动态上下文菜单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！