从应用程序安装文件夹的子文件夹的文件阅读 [英] Read file from subfolder of application installation folder

问题描述

我要读从 .TXT 文件中的文本内容，该文件位于应用程序安装文件夹，子文件夹，按的微软文档，我这样做是这样的：

I have to read the text content from an .txt file, this file is located in app installed folder, in a subfolder, according to Microsoft docs, I am doing it like this:

 private async void readMyFile()
    {
        // Get the app's installation folder.
        StorageFolder appFolder = Windows.ApplicationModel.Package.Current.InstalledLocation;

        // Get a file from a subfolder of the current folder by providing a relative path.
        string txtFileName = @"\myfolder\myfile.txt";

        try
        {
            //here my file exists and I get file path
            StorageFile txtfile = await appFolder.GetFileAsync(txtFileName);
            Debug.WriteLine("ok file found: " + txtfile.Path);

            //here I get the error
            string text = await FileIO.ReadTextAsync(txtfile);
            Debug.WriteLine("Txt is: " + text);
        }
        catch (FileNotFoundException ex)
        {
        }

    }

该错误是：

    Exception thrown: 'System.IO.FileNotFoundException' in mscorlib.ni.dll
exception file not found: System.IO.FileNotFoundException: The filename, directory name, or volume label syntax is incorrect. (Exception from HRESULT: 0x8007007B)
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Smadshop.MainPage.<testExistsFile>d__8.MoveNext()

不得不注意到，如果我用的是文件，而无需子文件夹一切工作正常。

Have to notice that if I use the file without subfolder everything is working fine.

推荐答案

你可以做其他的方式，使用 URI ：

you can do it in other way, using URI :

using Windows.Storage;
StorageFile file = await StorageFile.GetFileFromApplicationUriAsync("ms-appx:///file.txt");

所以你的情况将是：

So in your case it will be:

StorageFile txtfile = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///myfolder/myfile.txt"));

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