未能加载文件或程序集“System.Net.Http.Primitives, Version=1.5.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a”或它的某一个依赖项。系统找不到指定的文件

Question

demo是这里下载的。http://code.msdn.microsoft.com/windowsapps/Upload-File-to-Windows-c9169190 之前按照网页教程走过一遍，运行通过没问题。可是后来因为做别的应用隔天再打开这个demo时，却报错了。

添加了引用System.Net.Http.Primitives后，F5后抛出异常。被这个问题折腾好久了，不晓得是哪出问题了。

Answer 1

Hi，coolala

您的问题解决了吗。

如果没有您可以将你的解决方案先clean一下，然后再rebuild一下。

如果还出现错误的提示的话，你可以追踪具体的错误，然后针对这个错误进行改进。

如果您还需要帮助的话，请将您的具体问题贴出来，我们再进一步讨论！

Answer 2

今天又看了另一个demo，出现同样的问题。又是扔出TypeInitializationException类型的异常。网上搜到说是静态变量初始化导致的 。 可是之前写的都没出错。不晓得是不是环境出错了还是怎么了。

以下是demo中app.xaml.cs中的代码

namespace MyTrivia
{
    using System;
    using Microsoft.WindowsAzure.MobileServices;
    using MyTrivia.Model;
    using Windows.ApplicationModel;
    using Windows.ApplicationModel.Activation;
    using Windows.UI.Xaml;
    using Windows.UI.Xaml.Controls;

    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    public sealed partial class App : Application
    {
        private static MobileServiceClient mobileService = new MobileServiceClient(
            "{mobile-service-url}",
            "{mobile-service-key}");
                
        /// <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()
        {
            this.InitializeComponent();
            this.Suspending += this.OnSuspending;
        }

        public static MobileServiceClient MobileService
        {
            get { return mobileService; }
        }

        public static TriviaModel Data { get; set; }

        /// <summary>
        /// Invoked when the application is launched normally by the end user.  Other entry points
        /// will be used when the application is launched to open a specific file, to display
        /// search results, and so forth.
        /// </summary>
        /// <param name="args">Details about the launch request and process.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs args)
        {
            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();

                if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    // TODO: Load state from previously suspended application
                }

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

            if (rootFrame.Content == null)
            {
                // When the navigation stack isn't restored navigate to the first page,
                // configuring the new page by passing required information as a navigation
                // parameter
                if (!rootFrame.Navigate(typeof(MainPage), args.Arguments))
                {
                    throw new Exception("Failed to create initial page");
                }
            }

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

        /// <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();
        }
    }
}

Answer 3

Hi,coolala

估计是您的MobileServiceClient 类型的对象初始化时出现了问题，您可以看一下是不是里面的成员的初始化抛出了NullReferenceException异常！

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