Question

我有一个工作超链接如下：

XAML：

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

构造

 navHomeViewCommand = new DelegateCommand(NavHomeView);

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);
    }

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>

我是否必须为每个命令创建一个新命令，或者是否有办法为现有NavHomeView命令的每个超链接传递一个不同的参数（int），以便我可以重用此命令？

Answer 1

这是一个适合我的完整解决方案：

使用CommandParameter（根据Dmitry - Spasiba！）

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

将DelegateCommand更改为使用对象参数

navHomeViewCommand = new DelegateCommand<object>(NavHomeView);

命令属性保持不变，但方法已更改为使用参数：

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);
}

Answer 2

您可以使用超链接的'CommandParameter'属性。

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

使用参数进行Prism命令绑定？

2 个答案: