Prism RequestNavigate 不起作用 [英] Prism RequestNavigate does not work

问题描述

在每个视图中

public partial class View2 : UserControl, IRegionMemberLifetime, INavigationAware
{

  public bool KeepAlive
  {
    get { return false; }
  }

  bool INavigationAware.IsNavigationTarget(NavigationContext navigationContext)
  {
    return true;
  }
  void INavigationAware.OnNavigatedFrom(NavigationContext navigationContext)
  {
    // Intentionally not implemented.
  }
  void INavigationAware.OnNavigatedTo(NavigationContext navigationContext)
  {
    this.navigationJournal = navigationContext.NavigationService.Journal;
  }

}

初始化:

container.RegisterType<object, View1>("View1");
container.RegisterType<object, View2>("View2");

regionManager.RequestNavigate("Window1", new Uri("View1", UriKind.Relative));
regionManager.RequestNavigate("Window2", new Uri("View2", UriKind.Relative));

我遵循开发者指南，如果视图存在，它不会改变视图.

I am following the developer guide, it does not change the view if view exists.

推荐答案

您确定视图由容器填充吗?

Are you sure the view gets populated by the container?

我建议您为 RequestNavigate 方法提供回调，这样您就可以通过 NavigationResult:

I would suggest you to provide a callback for the RequestNavigate method, so you'll be able to track what happens with your view thru the NavigationResult:

regionManager.RequestNavigate
(
    "Window1",
    new Uri("View2", UriKind.Relative),
    (NavigationResult nr) => 
    {
        var error = nr.Error;
        var result = nr.Result;
        // put a breakpoint here and checkout what NavigationResult contains
    }
);

这篇关于Prism RequestNavigate 不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！