将文件从应用程序安装文件夹复制到本地存储 [英] Copy file from app installation folder to Local storage

问题描述

我正在尝试将文件从我的 Windows 8 应用程序的安装位置复制到它的本地存储.我一直在研究并试图这样做无济于事.到目前为止，这是我想出的，但我不确定我哪里出错了.

I'm attempting to copy a file from the installed location of my Windows 8 app to it's local storage. I've been researching around and trying to do this to no avail. This is what I have come up with so far but I'm not sure where I'm going wrong.

    private async void TransferToStorage()
    {


        try
        {
            // Get file from appx install folder
            Windows.ApplicationModel.Package package = Windows.ApplicationModel.Package.Current;
            Windows.Storage.StorageFolder installedLocation = package.InstalledLocation;
            StorageFile temp1 = await installedLocation.GetFileAsync("track.xml");
            // Read the file
            var lines = await FileIO.ReadLinesAsync(temp1);

            //Create the file in local storage
            StorageFile myStorageFile = await localFolder.CreateFileAsync("track_iso.xml", CreationCollisionOption.ReplaceExisting);
            // Write to it
            await FileIO.WriteLinesAsync(myStorageFile, lines);

        }
        catch (Exception)
        {

        }

    }

有什么想法吗?

推荐答案

自己解决了.这是其他遇到此问题/问题的人的方法:

Solved it myself. Here is the method for anyone else that encounters this question / problem:

   private async void TransferToStorage()
    {
        // Has the file been copied already?
        try
        {
            await ApplicationData.Current.LocalFolder.GetFileAsync("localfile.xml");
            // No exception means it exists
            return;
        }
        catch (System.IO.FileNotFoundException)
        {
            // The file obviously doesn't exist

        }
        // Cant await inside catch, but this works anyway
        StorageFile stopfile = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///installfile.xml"));
        await stopfile.CopyAsync(ApplicationData.Current.LocalFolder);
    }

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