RelayCommand在視圖模型不包含在XAML命令

Question

Menu.Pages綁定的ListBox對象充滿了這一點：

 this.Menu = new Menu() 
     { 
      Pages = new List<Page>() 
      { 
       new Page() { 
        Title = "ergre", 
        URI = "rgerg" 
       }, 
       new Page() { 
        Title = "herth", 
        URI = "wefwe" 
       } 
      } 
     }; 

我有以下XAML：

<ListBox Grid.Column="0" 
      Grid.Row="1" 
      x:Name="Pages" 
      ItemsSource="{Binding Menu.Pages}"> 
     <ListBox.ItemTemplate> 
      <DataTemplate> 
       <StackPanel> 
        <Button Command="{Binding ElementName=Pages, Path=DataContext.ButtonCommand_LoadGagPage}"> 
         <TextBlock Text="{Binding Title}"></TextBlock> 
        </Button> 
       </StackPanel> 
      </DataTemplate> 
     </ListBox.ItemTemplate> 
    </ListBox> 

命令綁定按鈕正確觸發以下方法：

...  
ButtonCommand_LoadGagPage = new RelayCommand<Page>((param) => ButtonCommand_ExecuteLoadGagPage(param));  
... 


public RelayCommand<Page> ButtonCommand_LoadGagPage 
{ 
    get; 
    private set; 
} 

public void ButtonCommand_ExecuteLoadGagPage(Page page) 
{ 
    // page is null :(? 
} 

但是，頁面變量e不包含該頁面。我如何正確連接對象...

Answer 1

我忘記了放置CommandParamter屬性。以下解決了這個問題！

<Button Command="{Binding ElementName=Pages, Path=DataContext.ButtonCommand_LoadGagPage}" 
          CommandParameter="{Binding}">