应用程序资源中的DataTemplate出现XBF错误

Question

使用Visual Studio 2015 (RTM)创建通用的Windows平台应用程序

我有一个数据模板，被应用程序中的多个页面使用，因此我希望只编写一次并从任何需要使用它的地方访问它。为了让其可以被任何页面访问，我将其编写在App.xaml的<Application.Resources>中：

<Application
x:Class="MyApp.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:MyApp"
xmlns:viewmodels="using:MyApp.ViewModels"
RequestedTheme="Light">

<Application.Resources>
    <DataTemplate x:Key="DetailContentTemplate" x:DataType="viewmodels:DataViewModel"> 
    ...
    </DataTemplate>
</Application.Resources>

上面的代码中的DataTemplate部分在单个页面中可以正常工作，但是这意味着我必须多次复制并粘贴它到其他页面，这不是高效的。然而，当我在App.xaml中使用DataTemplate时，会出现以下错误：

XBF generation error code 0x09c4

我已经确定这是由于x:DataType="viewmodels:DataViewModel"引起的（如果没有这个，也就是没有任何绑定，代码就可以正常工作）。查找错误的结果几乎没有。在通用Windows平台/WinRT应用程序中，有没有方便的解决方法/解决方案来重用带有绑定的DataTemplate，最好是在XAML中？ 编辑：根据要求，以下是App.xaml.cs的完整代码：

namespace MyApp
{
/// <summary>
/// Provides application-specific behavior to supplement the default Application class.
/// </summary>
sealed partial class App : Application
{
    /// <summary>
    /// Allows tracking page views, exceptions and other telemetry through the Microsoft Application Insights service.
    /// </summary>
    public static Microsoft.ApplicationInsights.TelemetryClient TelemetryClient;

    /// <summary>
    /// Initializes the singleton application object.  This is the first line of authored code
    /// executed, and as such is the logical equivalent of main() or WinMain().
    /// </summary>
    public App()
    {
        TelemetryClient = new Microsoft.ApplicationInsights.TelemetryClient();

        this.InitializeComponent();
        this.Suspending += OnSuspending;
    }

    /// <summary>
    /// Invoked when the application is launched normally by the end user.  Other entry points
    /// will be used such as when the application is launched to open a specific file.
    /// </summary>
    /// <param name="e">Details about the launch request and process.</param>
    protected override void OnLaunched(LaunchActivatedEventArgs e)
    {
        Frame rootFrame = Window.Current.Content as Frame;

        // Do not repeat app initialization when the Window already has content,
        // just ensure that the window is active
        if (rootFrame == null)
        {
            // Create a Frame to act as the navigation context and navigate to the first page
            rootFrame = new Frame();
            // Set the default language
            rootFrame.Language = Windows.Globalization.ApplicationLanguages.Languages[0];

            rootFrame.NavigationFailed += OnNavigationFailed;

            if (rootFrame.Content == null)
            {
                rootFrame.Navigate(typeof(MasterDetailPage));
            }

            // Place the frame in the current Window
            Window.Current.Content = rootFrame;
        }

        // Ensure the current window is active
        Window.Current.Activate();
    }

    /// <summary>
    /// Invoked when Navigation to a certain page fails
    /// </summary>
    /// <param name="sender">The Frame which failed navigation</param>
    /// <param name="e">Details about the navigation failure</param>
    void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
    {
        throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
    }

    /// <summary>
    /// Invoked when application execution is being suspended.  Application state is saved
    /// without knowing whether the application will be terminated or resumed with the contents
    /// of memory still intact.
    /// </summary>
    /// <param name="sender">The source of the suspend request.</param>
    /// <param name="e">Details about the suspend request.</param>
    private void OnSuspending(object sender, SuspendingEventArgs e)
    {
        var deferral = e.SuspendingOperation.GetDeferral();
        //TODO: Save application state and stop any background activity
        deferral.Complete();
    }
}

}

- Sean Scott

---

请问您能否添加 App.xaml.cs 构造函数的代码？ - Herdo

Answer 1

你可以在最新的构建会话中找到一些解释，时间是20:10。你基本上需要在XAML中创建一个资源字典并将一个类附加到它上面。这个类文件是必需的，以便编译器生成它的代码。

根据你需要做什么以及如何更改你的代码，你仍然可以使用“旧”的{Binding}标记，它将像以前一样工作。

<Application.Resources>
    <DataTemplate x:Key="DetailContentTemplate"> 
        <TextBlock Text={Binding myValue} />
    </DataTemplate>
</Application.Resources>

- Vincent