使用 BackgroundDownloader 时的 HRESULT 0x80072EE4 [英] HRESULT 0x80072EE4 when using BackgroundDownloader

问题描述

每次当我在 Windows 应用商店应用程序的 C# 代码中对 BackgroundDownloader 调用 CreateDownload 时，我都会收到以下异常:Exception from HRESULT: 0x80072EE4.我已经在我的包文件中声明了所有必要的功能.

Every time when I call CreateDownload on a BackgroundDownloader in my C# code for a Windows Store application, I get the following exception: Exception from HRESULT: 0x80072EE4. I have declared all necessary capabilities in my package file.

示例 调用 CreateDownload() 时，此代码会中断:

Example This code breaks when CreateDownload() is called:

public static async void DownloadFile(string url){
    var uri = new Uri(url, UriKind.Absolute);            
    FileSavePicker openPicker = new FileSavePicker();
    openPicker.SuggestedStartLocation = PickerLocationId.VideosLibrary;            
    openPicker.FileTypeChoices.Add("Video file", new List<string>() { ".mp4" }); 
    StorageFile file = await openPicker.PickSaveFileAsync();
    if (file != null)
    {
        DownloadOperation downloader = new BackgroundDownloader().CreateDownload(uri, file); //BREAKS HERE            
        //... (rest of code)
    }
}

例外这是我得到的确切例外:

Exception This is the exact exception I get:

System.Exception was unhandled by user code
  HResult=-2147012892
  Message=Exception from HRESULT: 0x80072EE4
  Source=Windows.Networking
  StackTrace:
   at Windows.Networking.BackgroundTransfer.BackgroundDownloader.CreateDownload(Uri uri, IStorageFile resultFile)
       at Example.BlankPage1.<DownloadFile>d__1.MoveNext()
  InnerException: 

当我尝试运行 Windows 8.1 后台传输示例时，我用同样的方法得到同样的异常.

When I try to run the Windows 8.1 Background Transfer sample, I get the same exception at the same method.

在0x80072EE4 上搜索时，建议移动 Internet 临时文件可以解决问题.就我而言，它不起作用.

When Googling on 0x80072EE4, it is suggested that moving Temporary Internet Files would solve the issue. In my case, it didn't work.

推荐答案

我知道这是一个老问题，但仍然，我想我只是找到了一些关于它的价值的输入.

I know this is an old question, but still, I guess I just found some input for what it's worth.

在删除 Windows 用户/帐户的所有权限后，我收到了 HRESULT: 0x80072EE4 错误(我猜)我的应用程序在使用后台下载程序(可能还有其他东西)时用于写入临时文件.

I was getting the HRESULT: 0x80072EE4 error after removing all permissions for the windows user/account that (I guess) my app is using for writing temp files when using background-downloader (and probably other stuff).

检查{userAccount}\AppData\Local\Packages{yourAppName}\AC"文件夹的权限，特别是其中的BackgroundTransferApi"文件夹，并确保有一个类似于S-"的帐户1-15-2-.......{veryLongString}" 并设置了所有权限.

Check the permissions on the "{userAccount}\AppData\Local\Packages{yourAppName}\AC" folder, and specifically the "BackgroundTransferApi" folder in there, and make sure that there is an account named something like "S-1-15-2-.......{veryLongString}" and that it has all the permissions set.

希望这对未来的访问者有所帮助:)

Hope this helps some future visitor :)

这篇关于使用 BackgroundDownloader 时的 HRESULT 0x80072EE4的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！