c# - UWP 发布版本崩溃但不在 Visual Studio 中

Question

当我从 VS 2015 (Windows 10) 部署该应用程序时，该应用程序运行良好但是，当我从“Store > Create App Packages...”创建构建，然后从 powershell 脚本的应用程序安装应用程序时，情况就大不相同了。

我已将问题隔离到为锁定屏幕设置图像的部分。每当我在消息对话框中单击"is"以更改锁定屏幕时，我都会崩溃，我已经附加了调试器，但只收到以下异常:

Exception thrown at 0x00007FFA61091F08 (KernelBase.dll) in 
ApplicationFrameHost.exe: 0x80010012: 
The callee (server [not server application]) is not available 
and disappeared; all connections are invalid. The call did not execute.

重现错误的代码基于以下文章:

https://msdn.microsoft.com/en-us/windows.system.userprofile.userprofilepersonalizationsettings.trysetlockscreenimageasync

    public async Task<bool> ChangeLockScreenBackground()
    {
        bool success = false;
        if (UserProfilePersonalizationSettings.IsSupported())
        {
            var uri = new Uri("ms-appx:///Assets/SplashScreen.scale-400.png");
            StorageFile file = await StorageFile.GetFileFromApplicationUriAsync(uri);
            UserProfilePersonalizationSettings profileSettings = UserProfilePersonalizationSettings.Current;
            success = await profileSettings.TrySetLockScreenImageAsync(file);
        }
        return success;


    }

我不知道发生了什么，我认为这是应用程序的功能。但是我已经启用了用户帐户信息和图片库，但仍然没有成功:(

Answer 1

看起来您正在使用一个已经打开的文件:SplashScreen* 并且来自该文件夹，您可能无法设置墙纸。

注意:“您的应用无法从任何文件夹设置壁纸。将文件复制到 ApplicationData.Current.LocalFolder 并从那里设置壁纸”

所以我对代码做了一点改动，我也把注意力放在了documentation上。 :

Remarks

Caution For the mobile device family, you can only set a lock screen image that is smaller than 2 megabytes (MB). Attempting to set a lock screen image that is larger fails, even though the async operation returns true.
Caution When you set an image more than once, the new image file must have a different name than the previously set image. If you set a new image using a file with the same name as the previous image, it will fail.

在这段代码中，我将一个文件添加到 Visual Studio 项目中名为 img 的文件夹中，并将图像属性设置为“如果更新则复制”。然后我从这样的位置加载图像。

async Task<bool> SetWallpaperAsync(string localAppDataFileName)
{
    bool success = false;
    var uri = new Uri($"ms-appx:///img/{localAppDataFileName}");

    //generate new file name to avoid colitions
    var newFileName = $"{Guid.NewGuid().ToString()}{Path.GetExtension(localAppDataFileName)}";

    if (UserProfilePersonalizationSettings.IsSupported())
    {
        var profileSettings = UserProfilePersonalizationSettings.Current;

        var wfile = await StorageFile.GetFileFromApplicationUriAsync(uri);

        //Copy the file to Current.LocalFolder because TrySetLockScreenImageAsync
        //Will fail if the image isn't located there 
        using (Stream readStream = await wfile.OpenStreamForReadAsync(),
                      writestream = await ApplicationData.Current.LocalFolder.OpenStreamForWriteAsync(newFileName,
                                     CreationCollisionOption.GenerateUniqueName)
              )
        { await readStream.CopyToAsync(writestream); }

        StorageFile file = await ApplicationData.Current.LocalFolder.GetFileAsync(newFileName);
        success = await profileSettings.TrySetLockScreenImageAsync(file);
    }

    Debug.WriteLine(success);
    return success;
}

此代码在 Windows Mobile 10 中完美运行，并且因为这是一个通用应用程序，您应该期望它在 Windows 10 应用程序中以相同的方式运行......是的。

让我知道这对你来说是否足够。