c# - MVVM 光 "Type Not Found in cache"

Question

我正在尝试将我的 Windows Phone 8 Silverlight 应用程序转换为 8.1 Phone 应用程序作为通用应用程序的一部分。我不知道这是否相关，因为这是我第一次尝试正确实现 View 模型。我想在 Windows 和 Windows Phone 的 View 之间共享数据。无论如何，这就是我遇到的错误。

Error   3   Type not found in cache: ScoreAlerts.ViewModel.FixturesViewModel.   C:\Users\Dave\Documents\Visual Studio 2012\Projects\Score Alerts\ScoreAlerts\ScoreAlerts.WindowsPhone\Pages\Fixtures.xaml   9   5   ScoreAlerts.WindowsPhone
Error   4   Type not found in cache: ScoreAlerts.ViewModel.HomePageViewModel.   C:\Users\Dave\Documents\Visual Studio 2012\Projects\Score Alerts\ScoreAlerts\ScoreAlerts.Shared\Pages\HomePage.xaml 34  9   ScoreAlerts.WindowsPhone

这是我的 View 模型定位器的样子

public class ViewModelLocator
{
    /// <summary>
    /// Initializes a new instance of the ViewModelLocator class.
    /// </summary>
    public ViewModelLocator()
    {
        if (!ViewModelBase.IsInDesignModeStatic)
        {
            ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default);

            if (ViewModelBase.IsInDesignModeStatic)
            {
                // Create design time view services and models
                //SimpleIoc.Default.Register<IDataService, DesignDataService>();
            }
            else
            {
                // Create run time view services and models
                //SimpleIoc.Default.Register<IDataService, DataService>();
            }

            SimpleIoc.Default.Register<HomePageViewModel>();
            SimpleIoc.Default.Register<FixturesViewModel>();
        }
    }

    [SuppressMessage("Microsoft.Performance",
        "CA1822:MarkMembersAsStatic",
        Justification = "This non-static member is needed for data binding purposes.")]
    public HomePageViewModel Main
    {
        get
        {
            //return ServiceLocator.Current.GetInstance<HomePageViewModel>();
            return SimpleIoc.Default.GetInstance<HomePageViewModel>("default");
        }
    }

    [SuppressMessage("Microsoft.Performance",
        "CA1822:MarkMembersAsStatic",
        Justification = "This non-static member is needed for data binding purposes.")]
    public FixturesViewModel Fixtures
    {
        get
        {
            //return ServiceLocator.Current.GetInstance<FixturesViewModel>();
            return SimpleIoc.Default.GetInstance<FixturesViewModel>("default");
        }
    }

    public static void Cleanup()
    {
        // TODO Clear the ViewModels
    }
}

我认为 XAML 有这个

DataContext="{Binding Fixtures, Source={StaticResource Locator}}"

我的应用有这个

<viewModel:ViewModelLocator x:Key="Locator"
                         d:IsDataSource="True"/>

知道我做错了什么吗？

Answer 1

答案是一个相当简单的错误。该位未在设计模式下执行

SimpleIoc.Default.Register<HomePageViewModel>();

My code for SimpleIoc.Default.Register(); was inside an if statement that was never executed in design mode.