UWP App FileLoadException WindowsRuntime仅在移动设备上发生

Question

I've been having trouble with my app after deploying the store generated bundles onto my Windows 10 Mobile device. I also uploaded this to the app store review team but they are constantly seeing a crash. So I created a blank project to try and find out what the issue was.

The blank app just contains a function to try and find a folder using the StorageFolder API. If it doesn't exists then it just displays a message saying it wasn't found. I also surround this function with a try/catch because I believe this area of the code is the culprit of my problems.

Here is the blank project on Github: https://github.com/cmakthat/MobileCrashTesting

Here are the generated bundles from Visual Studio: https://1drv.ms/f/s!Anec4-FVkNsbhdtfR82xskiDviPW6g

More specifically, here is the code too:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.ApplicationModel;
using Windows.ApplicationModel.Activation;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Storage;
using Windows.UI.Popups;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

namespace MobileTestingCrash
{
    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    sealed partial class App : Application
    {
        /// <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 += OnSuspending;

            try
            {

                deleteTempClips();
            }
            catch(Exception ex)
            {
                MessageDialog dia = new MessageDialog("App init exception: " + ex.ToString());
                dia.ShowAsync();
            }
        }

        public static async void deleteTempClips()
        {
            StorageFolder storageFolder = ApplicationData.Current.LocalFolder;

            IStorageItem storageItem = await storageFolder.TryGetItemAsync("Temp");

            if ( storageItem == null )
            {
                MessageDialog dia = new MessageDialog("Item never found");
                dia.ShowAsync();
            }
            return;
        }

        /// <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();

                rootFrame.NavigationFailed += OnNavigationFailed;

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

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

            if (e.PrelaunchActivated == false)
            {
                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
                    rootFrame.Navigate(typeof(MainPage));
                }
                // 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();
        }
    }
}

Here's the rundown when deploying to my Windows 10 Mobile device:

• Deploy in debug mode on Visual Studio: Works
• Deploy in release mode on Visual Studio: Works
• Deploy the "_Test" bundle: Works
• Deploy the "appxupload" bundle within it: FileLoadException

The FileLoadException I am getting is shown in this image:

So now I'm at a lost on what to do. I can't get my app approved by the store because of this blocker. My original project was working a few weeks ago, but now suddenly I'm starting to get these crashes and I haven't changed anything major. Any ideas?

Answer 1

Deploy the "appxupload" bundle within it: FileLoadException

You can't deploy the appxupload into mobile directly. Because the appxupload file is not complete. You could verify this via modify the appxupload file suffix name to zip and explore it. It contain two files, appxbundle file and appxsym file.

And the appxsym will be used when appxupload file upload to store. It will make complete appxbundle file after store cloud compilation. And the complete file is equal to _Test bundle that described in your case.

So, It is not a good practice that Deploy the "appxupload" bundle .