Silverlight4给DataGrid添加ContextMenu右键菜单

Toolkit Samples中的示例是将ContextMenu添加到ListBox的ItemTemplate中

而DataGrid由于没有ItemTemplate,所以稍有不同

XAML代码

   
     

    
      
    
      <
    
      UserControl 
 
    
      xmlns
    
      ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    
      
 xmlns:x
    
      ="http://schemas.microsoft.com/winfx/2006/xaml"
    
      
 xmlns:d
    
      ="http://schemas.microsoft.com/expression/blend/2008"
    
      
 xmlns:mc
    
      ="http://schemas.openxmlformats.org/markup-compatibility/2006"
    
      
 mc:Ignorable
    
      ="d"
    
      
 d:DesignHeight
    
      ="300"
    
       d:DesignWidth
    
      ="400"
    
      
 x:Class
    
      ="SilverlightApplication8.MainPage"
    
      
 xmlns:data
    
      ="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"
    
      >
    
      

 
    
      <
    
      Grid 
    
      x:Name
    
      ="LayoutRoot"
    
       Background
    
      ="White"
    
      >
    
      
 
    
      <
    
      data:DataGrid 
    
      Name
    
      ="dg"
    
       ItemsSource
    
      ="
    
      {Binding}
    
      "
    
       LoadingRow
    
      ="dg_LoadingRow"
    
      />
    
      
 
    
      </
    
      Grid
    
      >
    
      

    
      </
    
      UserControl
    
      >
    
      

   
     

添加引用System.Windows.Controls和System.Windows.Controls.Input.Toolkit

C#代码

   
     

    
      
    
      using
    
       System;

    
      using
    
       System.Collections.Generic;

    
      using
    
       System.Linq;

    
      using
    
       System.Net;

    
      using
    
       System.Windows;

    
      using
    
       System.Windows.Controls;

    
      using
    
       System.Windows.Documents;

    
      using
    
       System.Windows.Input;

    
      using
    
       System.Windows.Media;

    
      using
    
       System.Windows.Media.Animation;

    
      using
    
       System.Windows.Shapes;


    
      using
    
       System.Windows.Data;

    
      namespace
    
       SilverlightApplication8
{
 
    
      public
    
       
    
      partial
    
       
    
      class
    
       MainPage : UserControl
 {
 PagedCollectionView pcv;

 
    
      public
    
       MainPage()
 {
 InitializeComponent();

 List
    
      <
    
      Person
    
      >
    
       list 
    
      =
    
       
    
      new
    
       List
    
      <
    
      Person
    
      >
    
      ();
 list.Add(
    
      new
    
       Person { ID 
    
      =
    
       
    
      1
    
      , Name 
    
      =
    
       
    
      "
    
      张三
    
      "
    
       });
 list.Add(
    
      new
    
       Person { ID 
    
      =
    
       
    
      2
    
      , Name 
    
      =
    
       
    
      "
    
      李四
    
      "
    
       });
 list.Add(
    
      new
    
       Person { ID 
    
      =
    
       
    
      3
    
      , Name 
    
      =
    
       
    
      "
    
      王五
    
      "
    
       });

 pcv 
    
      =
    
       
    
      new
    
       PagedCollectionView(list);
 dg.ItemsSource 
    
      =
    
       pcv;
 }

 
    
      private
    
       
    
      void
    
       MenuItem_Click(
    
      object
    
       sender, RoutedEventArgs e)
 {
 Person p 
    
      =
    
       ((MenuItem)sender).DataContext 
    
      as
    
       Person;
 
    
      if
    
       (p 
    
      !=
    
       
    
      null
    
      )
 {
 pcv.Remove(p);
 }
 }

 
    
      private
    
       
    
      void
    
       dg_LoadingRow(
    
      object
    
       sender, DataGridRowEventArgs e)
 {
 DataGridRow dgr 
    
      =
    
       e.Row;
 Person p 
    
      =
    
       (Person)dgr.DataContext;

 ContextMenu cm 
    
      =
    
       
    
      new
    
       ContextMenu();
 MenuItem mi 
    
      =
    
       
    
      new
    
       MenuItem();
 mi.Header 
    
      =
    
       
    
      "
    
      删除 
    
      "
    
       
    
      +
    
       p.Name;
 mi.Click 
    
      +=
    
       MenuItem_Click;
 cm.Items.Add(mi);

 ContextMenuService.SetContextMenu(dgr, cm);
 }
 }

 
    
      public
    
       
    
      class
    
       Person
 {
 
    
      public
    
       
    
      int
    
       ID { 
    
      get
    
      ; 
    
      set
    
      ; }
 
    
      public
    
       
    
      string
    
       Name { 
    
      get
    
      ; 
    
      set
    
      ; }
 }
}

   
     

最好不要偷懒将ContextMenu直接作为DataGrid的右键菜单

这样在点击时需要根据DataGrid的SelectedItem获取选中行

就会造成当前选中第一行,鼠标放在第三行上右击"删除",最后却会删除第一行的情况