System.IO.FileNotFoundException: '系统找不到指定的文件（使用 SetWallpaperAsync）

Question

I am using the following method to set the background image of my uwp app:

    async Task<bool> SetWallpaperAsync(string localAppDataFileName)
    {
        bool success = false;
        if (UserProfilePersonalizationSettings.IsSupported())
        {
            var uri = new Uri("ms-appx:///Local/" + localAppDataFileName);
            StorageFile file = await StorageFile.GetFileFromApplicationUriAsync(uri);
            UserProfilePersonalizationSettings profileSettings = UserProfilePersonalizationSettings.Current;
            success = await profileSettings.TrySetLockScreenImageAsync(file);
        }
        return success;
    }

When I call await SetWallpaperAsync("StoreLogo.png"); I get the error "System.IO.FileNotFoundException: 'The system cannot find the file specified". I'm guessing the problem is that I have the file stored in the wrong place but I have no idea where to put it.

Answer 1

When I call await SetWallpaperAsync("StoreLogo.png"); I get the error "System.IO.FileNotFoundException,but I have no idea where to put it.

The problem is that you get file with wrong path. You can access files in the local app data store using the ms-appdata:///local/ uri scheme. For example:

ms-appdata:///local/myBinaryFile

And you could also use ApplicationData.Current.LocalFolder API the get file

Use the ms-appx URI scheme to refer to a file that comes from your app's package . and you could also use InstalledLocation API.

For more detail, you could refer URI schemes