wpf Prism 命令绑定使用参数？

Prism Command Binding using Parameter?

提问by Ches Scehce

I have a working hyperlink as follow:

我有一个工作超链接如下：

XAML:

XAML：

 <TextBlock >
    <Hyperlink Command="{Binding NavHomeViewCommand}" >
       <Run Text="{Binding PersonSelected.PersonKnownName}" />
    </Hyperlink>
</TextBlock>

Constructor:

构造函数：

 navHomeViewCommand = new DelegateCommand(NavHomeView);

Command:

命令：

     private readonly ICommand navHomeViewCommand;
    public ICommand NavHomeViewCommand
    {
        get
        { return navHomeViewCommand; }
    }
    private void NavHomeView()
    {
        int val;
        val = PersonSelected.PersonKnownID);
        var parameters = new NavigationParameters();
        parameters.Add("To", val);
        _regionManager.RequestNavigate("MainRegion", new Uri("HomeView", UriKind.Relative), parameters);
    }

If I want to have multiple hyperlinks such as...

如果我想要多个超链接，例如...

     <Hyperlink Command="{Binding NavHomeViewCommand}" >
       <Run Text="{Binding PersonSelected.PersonKnownName}" />
    </Hyperlink>
    <Hyperlink Command="{Binding NavHomeViewCommand}" >
       <Run Text="{Binding PersonSelected.PersonKnownName2}" />
    </Hyperlink>
    <Hyperlink Command="{Binding NavHomeViewCommand}" >
       <Run Text="{Binding PersonSelected.PersonKnownName3}" />
    </Hyperlink>

Do I have to make a new Command for each or is there a way to pass a different parameter (int) for each hyperlink to the existing NavHomeView command so I can reuse this command?

我是否必须为每个命令创建一个新命令，或者有没有办法将每个超链接的不同参数 (int) 传递给现有的 NavHomeView 命令，以便我可以重用此命令？

采纳答案by Ches Scehce

Here is a complete solution that worked for me:

这是一个对我有用的完整解决方案：

1. Use CommandParameter (as per Dmitry - Spasiba!)

   <TextBlock>
       <Hyperlink CommandParameter="{Binding PersonSelected.PersonKnown2ID}"
                  Command="{Binding NavHomeViewCommand}" >
           <Run Text="{Binding PersonSelected.PersonKnownName2}" />
       </Hyperlink>
   </TextBlock>
   

2. Change DelegateCommand to use object parameter

   navHomeViewCommand = new DelegateCommand<object>(NavHomeView);
   

3. Command Properties remain unchanged but method changed to use parameter:

   private readonly ICommand navHomeViewCommand;
   public ICommand NavHomeViewCommand
   {
       get { return navHomeViewCommand; }
   }
   
   private void NavHomeView(object ID)
   {
       int val = Convert.ToInt32(ID);
       var parameters = new NavigationParameters();
       parameters.Add("To", val);
      _regionManager.RequestNavigate("MainRegion", new Uri("HomeView", UriKind.Relative), parameters);
   }
   

1. 使用 CommandParameter（根据 Dmitry - Spasiba！）

   <TextBlock>
       <Hyperlink CommandParameter="{Binding PersonSelected.PersonKnown2ID}"
                  Command="{Binding NavHomeViewCommand}" >
           <Run Text="{Binding PersonSelected.PersonKnownName2}" />
       </Hyperlink>
   </TextBlock>
   

2. 更改 DelegateCommand 以使用对象参数

   navHomeViewCommand = new DelegateCommand<object>(NavHomeView);
   

3. 命令属性保持不变，但方法更改为使用参数：

   private readonly ICommand navHomeViewCommand;
   public ICommand NavHomeViewCommand
   {
       get { return navHomeViewCommand; }
   }
   
   private void NavHomeView(object ID)
   {
       int val = Convert.ToInt32(ID);
       var parameters = new NavigationParameters();
       parameters.Add("To", val);
      _regionManager.RequestNavigate("MainRegion", new Uri("HomeView", UriKind.Relative), parameters);
   }
   

回答by Dzmitry Martavoi

You can use 'CommandParameter' property of the Hyperlink.

您可以使用超链接的“CommandParameter”属性。

 <Hyperlink Command="{Binding NavHomeViewCommand}" CommandParameter="1" >
       <Run Text="{Binding PersonSelected.PersonKnownName}" />
 </Hyperlink>