C# Windows模板工作室棱镜导航
我正在使用WindowsTemplateStudio(Prism)创建一个测试项目,但是从文档中,我无法理解导航。我现在知道如何使用MVVM Light来实现这一点,但我不得不问,因为文档并没有详细说明。如何在Prism Windows Template Studio中从一页导航到另一页 适用于MVVM灯光:C# Windows模板工作室棱镜导航,c#,uwp,prism,windows-template-studio,C#,Uwp,Prism,Windows Template Studio,我正在使用WindowsTemplateStudio(Prism)创建一个测试项目,但是从文档中,我无法理解导航。我现在知道如何使用MVVM Light来实现这一点,但我不得不问,因为文档并没有详细说明。如何在Prism Windows Template Studio中从一页导航到另一页 适用于MVVM灯光: ViewModelLocator.Current.NavigationService.Navigate(typeof(MyViewModel).FullName,null) 在Templa
ViewModelLocator.Current.NavigationService.Navigate(typeof(MyViewModel).FullName,null)
在Template10上工作:
BootStrapper.Current.NavigationService.Navigate(typeof(MyViewPage),null)
您可以使用Windows Template Studio创建测试应用程序,检查导航页面项目类型,然后检查prism设计模式。您将在ShellViewModel
类中找到\u navigationService
protected override UIElement CreateShell(Frame rootFrame)
{
var shell = Container.Resolve<ShellPage>();
shell.SetRootFrame(rootFrame);
return shell;
}
在Windows模板Studio Prism上工作
_navigationService.Navigate(pageKey, null);
ShellViewModel.cs
public class ShellViewModel : ViewModelBase
{
private static INavigationService _navigationService;
private WinUI.NavigationView _navigationView;
private bool _isBackEnabled;
private WinUI.NavigationViewItem _selected;
public ICommand ItemInvokedCommand { get; }
public bool IsBackEnabled
{
get { return _isBackEnabled; }
set { SetProperty(ref _isBackEnabled, value); }
}
public WinUI.NavigationViewItem Selected
{
get { return _selected; }
set { SetProperty(ref _selected, value); }
}
public ShellViewModel(INavigationService navigationServiceInstance)
{
_navigationService = navigationServiceInstance;
ItemInvokedCommand = new DelegateCommand<WinUI.NavigationViewItemInvokedEventArgs>(OnItemInvoked);
}
public void Initialize(Frame frame, WinUI.NavigationView navigationView)
{
_navigationView = navigationView;
frame.NavigationFailed += (sender, e) =>
{
throw e.Exception;
};
frame.Navigated += Frame_Navigated;
_navigationView.BackRequested += OnBackRequested;
}
private void OnItemInvoked(WinUI.NavigationViewItemInvokedEventArgs args)
{
var item = _navigationView.MenuItems
.OfType<WinUI.NavigationViewItem>()
.First(menuItem => (string)menuItem.Content == (string)args.InvokedItem);
var pageKey = item.GetValue(NavHelper.NavigateToProperty) as string;
_navigationService.Navigate(pageKey, null);
}
private void Frame_Navigated(object sender, NavigationEventArgs e)
{
IsBackEnabled = _navigationService.CanGoBack();
Selected = _navigationView.MenuItems
.OfType<WinUI.NavigationViewItem>()
.FirstOrDefault(menuItem => IsMenuItemForPageType(menuItem, e.SourcePageType));
}
private void OnBackRequested(WinUI.NavigationView sender, WinUI.NavigationViewBackRequestedEventArgs args)
{
_navigationService.GoBack();
}
private bool IsMenuItemForPageType(WinUI.NavigationViewItem menuItem, Type sourcePageType)
{
var sourcePageKey = sourcePageType.Name;
sourcePageKey = sourcePageKey.Substring(0, sourcePageKey.Length - 4);
var pageKey = menuItem.GetValue(NavHelper.NavigateToProperty) as string;
return pageKey == sourcePageKey;
}
}
因此,允许
\u导航服务.Navigate(pageKey,null)代码>可访问性在其他页面上,我需要在ShellViewModel
上将\u navigationService
设置为public
?我只是尝试了一下,确实奏效了,但是有什么原因,为什么我不应该这样做呢?你不需要将_navigationService设置为public,你可以在每个视图模型构造方法中获得navigationServiceInstance。例如,publicblank1viewmodel(INavigationService-navigationServiceInstance){{u-navigationService=navigationServiceInstance;}
App.xaml.cs的情况如何?当导航到页面时,什么是好的做法?您可以参考Tempate 10 Prism。我认为与BootStrapper共享navigationService是一种很好的做法。不客气,我认为您也可以将navigationService
存储在app.xaml.cs中,就像模板10BootStrapper
类一样。如果答案是有用的,请考虑接受它。谢谢。