Mvvm RadGridView编辑按钮命令在Prism 4.1 Silverlight 5中未绑定

根据我的要求，我在第行和标题行中有一个编辑按钮/超链接，我应该在RadGridView控件中有一个添加新按钮/超链接。这些按钮将加载一个用于添加/编辑数据的子窗口弹出窗口。我的应用程序是在Silverlight5中使用Prism 4.1和MVVM（负责创建视图方法的模型）

我创建了如下按钮：

  <telerik:GridViewColumn  Width="80">
                <telerik:GridViewColumn.Header>
                    <StackPanel Orientation="Horizontal" 
                                VerticalAlignment="Top"
                                HorizontalAlignment="Center">
                        <telerik:RadButton DataContext="{Binding DataContext ,ElementName=LayoutRoot}"
                                           prism:Click.Command="{Binding AddUserEventCommand}"
                                           Content="Add User">
                           <!-- <Image Source="../../Assets/Images/icon_user_add.png" 
                               Cursor="Hand" Stretch="None" Width="32" Height="32"/>-->
                        </telerik:RadButton>
                    </StackPanel>
                </telerik:GridViewColumn.Header>
                <telerik:GridViewColumn.CellTemplate>
                    <DataTemplate>
                        <telerik:RadButton prism:Click.Command="{Binding DataContext.EditUserEventCommand}">
                            <Image Source="../../Assets/Images/icon_user_update.png" 
                               Cursor="Hand" 
                               Stretch="None" Width="32" Height="32" >
                            </Image>
                        </telerik:RadButton>
                    </DataTemplate>
                </telerik:GridViewColumn.CellTemplate>
            </telerik:GridViewColumn>

但仍然没有成功。

EditUserEventCommand和AddUserEventCommand都是DelegateCommand

在我的ViewModel中，代码如下所示：

   <telerik:RadButton Command="{Binding AddUserEventCommand}" Content="Add User" VerticalAlignment="Top"></telerik:RadButton>

  public class UsersTabViewModel : TabViewModelBase , IUsersTabViewModel
{
  /// Constructor
  public UsersTabViewModel(IUsersTabView view):base(view) {
        this.Header = "Users";
        this.Title = "Users";
        this.IsSelected = true;
        ctx = new UserRiaDomainContext();
        fillUser();
        doEventBinding();
    }

  private void doEventBinding() {
        AddUserEventCommand = new DelegateCommand(AddUser, CanAddUser);
        UpdateUserEventCommand = new DelegateCommand(EditUser, CanEditUser);
    }
  ///  Bind with User Add
    private DelegateCommand _addUserEventCommand;
    public DelegateCommand AddUserEventCommand
    {
        get { return _addUserEventCommand; }
        set
        {
            _addUserEventCommand = value;
            OnPropertyChanged("AddUserEventCommand");
        }
    }

    ///  Bind with User Update in Grid Row
    private DelegateCommand _updateUserEventCommand;
    public DelegateCommand UpdateUserEventCommand {
        get { return _updateUserEventCommand; }
        set {
            _updateUserEventCommand = value;
            OnPropertyChanged("UpdateUserEventCommand");
        }
    }        
     ......
   }

---

如何解决

在越来越多地阅读了有关调用堆栈的内容后，我终于让它工作起来了

由于我的ViewModel和视图绑定是构造函数注入的，所以StaticResource不是我的解决方案。我需要找到祖先数据上下文以获得命令绑定。 所以我喜欢这样：

 <telerik:RadButton Command="{Binding DataContext.AddUserEventCommand , RelativeSource={RelativeSource AncestorType=UserControl}}"
                                           Background="Green" Foreground="WhiteSmoke" FontSize="14" Padding="10,5,10,5">
                           <Image Source="../../Assets/Images/icon_user_add.png" 
                               Cursor="Hand" Stretch="None" Width="32" Height="32"/>
                        </telerik:RadButton>

这样按钮根据父DataContext绑定，命令开始工作

 <telerik:RadButton Command="{Binding DataContext.AddUserEventCommand , RelativeSource={RelativeSource AncestorType=UserControl}}"
                                           Background="Green" Foreground="WhiteSmoke" FontSize="14" Padding="10,5,10,5">
                           <Image Source="../../Assets/Images/icon_user_add.png" 
                               Cursor="Hand" Stretch="None" Width="32" Height="32"/>
                        </telerik:RadButton>