问Catel与Xamarin.Forms

EN

我不能让Xamarin.Forms和Catel一起工作。

我看到了这个示例，但它似乎已经过时了。

当我通过NuGet下载Catel时，会得到不同版本的不同问题：

• v5.1: 编译时异常： Exception while loading assemblies: System.IO.FileNotFoundException: Could not load assembly 'Obsolete, Version=4.2.4.0, Culture=neutral, PublicKeyToken=1ca091877d12ca03'. Perhaps it doesn't exist in the Mono for Android profile?
• v5.0: 运行时异常(创建new App();时)： Could not load signature of Catel.MVVM.IViewModelFactory:CreateViewModel due to: Could not resolve type with token 01000061 (from typeref, class/assembly System.ComponentModel.IDataErrorInfo, Catel.Core, Version=5.0.0.0, Culture=neutral, PublicKeyToken=null) assembly:Catel.Core, Version=5.0.0.0, Culture=neutral, PublicKeyToken=null type:System.ComponentModel.IDataErrorInfo member:<none>
• v4.5.*

创建应用程序对象时的

- Using `ViewModelBase`:

运行时异常: System.TypeLoadException：无法用令牌 01000097解析类型(来自typeref、类/程序集System.Reflection.BindingFlags、Catel.Core、Version=4.5.4.0、Culture=neutral、PublicKeyToken=null)

-我对IViewModel的实施：

好的，MainPage加载，绑定工作，构造器通过参数获得正确的服务，但是，例如，当我从命令调用'_uiVisualizerService.Show( subPageViewModel )‘时，它会抛出'InvalidCastException’。异常前的Catel中的最后一行：Injecting properties into type 'SubPage' after construction。但是SubPage和SubPageViewModel绝对是空的。

详细信息：

---> System.InvalidCastException: Specified cast is not valid. at Catel.Services.UIVisualizerService+<ShowAsync>d__9.MoveNext () [0x00096] in C:\CI_WS\Ws\97969\Source\Catel\src\Catel.MVVM\Catel.MVVM.Xamarin.Forms\Services\UIVisualizerService.cs:151 at System.Threading.Tasks.Task.ThrowIfExceptional (System.Boolean includeTaskCanceledExceptions) [0x00011] in <183b200ee49746d48fc781625979428e>:0 at System.Threading.Tasks.Task'1[TResult].GetResultCore (System.Boolean waitCompletionNotification) [0x0002b] in <183b200ee49746d48fc781625979428e>:0 at System.Threading.Tasks.Task'1[TResult].get_Result () [0x0000f] in <183b200ee49746d48fc781625979428e>:0 at Catel.Services.UIVisualizerService.Show (Catel.MVVM.IViewModel viewModel, System.EventHandler``1[TEventArgs] completedProc) [0x00000] in C:\CI_WS\Ws\97969\Source\Catel\src\Catel.MVVM\Catel.MVVM.Xamarin.Forms\Services\UIVisualizerService.cs:125 at XamarinFormsCatel.ViewModels.MainPageViewModel.OnGo () [0x00015] in C:\!Work\Test\XamarinFormsCatel\XamarinFormsCatel\XamarinFormsCatel\XamarinFormsCatel\ViewModels\MainPageViewModel.cs:34 at Xamarin.Forms.Command+<>c__DisplayClass3_0.<.ctor>b__0 (System.Object o) [0x00000] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Core\Command.cs:73 at Xamarin.Forms.Command.Execute (System.Object parameter) [0x00000] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Core\Command.cs:107 at Xamarin.Forms.Button.Xamarin.Forms.IButtonController.SendClicked () [0x0000a] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Core\Button.cs:121 at Xamarin.Forms.Platform.Android.AppCompat.ButtonRenderer+ButtonClickListener.OnClick (Android.Views.View v) [0x0000b] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\AppCompat\ButtonRenderer.cs:298 at Android.Views.View+IOnClickListenerInvoker.n_OnClick_Landroid_view_View_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_v) [0x0000f] in <71828dd8fb5f4508815e23d6996c45c2>:0 at (wrapper dynamic-method) System.Object:4c9f6786-8ab0-4bd8-bdb1-4cc7a3d7ddc7 (intptr,intptr,intptr) -> (Inner Exception #0) System.InvalidCastException: Specified cast is not valid. at Catel.Services.UIVisualizerService+<ShowAsync>d__9.MoveNext () [0x00096] in C:\CI_WS\Ws\97969\Source\Catel\src\Catel.MVVM\Catel.MVVM.Xamarin.Forms\Services\UIVisualizerService.cs:151 <---

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我所做的：

• 将android项目中的android引用从MonoAndroid更改为portable-net45+wp8+win8+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10+UAP10。如果不这样做，编译将失败。
• MainPage.xaml <catel:ContentPage ... xmlns:catel="clr-namespace:Catel.Windows.Controls;assembly=Catel.MVVM">
• MainPageViewModel.cs public class MainPageViewModel : ViewModelBase { }
• App.cs public class App : Catel.Xamarin.Forms.Application<Views.MainPage> { }
• MainActivity.cs (安卓) 公共类MainActivity :MainActivity{ TabLayoutResource = Resource.Layout.Tabbar；ToolbarResource = Resource.Layout.Toolbar；base.OnCreate( bundle )；Xamarin.Forms.Forms.Init(此包)；var app =新应用程序( )；LoadApplication( app )；}}

窗户7，64x。Xamarin.Forms: 2.3.4.267

任何帮助都非常感谢。