Question

我正在创建一个UWP应用程序，其中将文件存储在本地文件夹中。一切正常，直到我尝试保存.doc文件。

1）我正在保存带扩展名的文件（例如：filename.mp3，filename.flv，filename.png）。

2）保存此文件时，我没有收到任何异常。

3）但是当我尝试保存.doc或.docx文件时，比如＆＃34; filename.doc＆＃34;我得到了＃34; UnauthorizedAccessException＆＃34;异常。

4）重要的是，如果我尝试在文件名中保存没有扩展名的同一文件＆＃34; filename＆＃34;而不是＆＃34; filename.doc＆＃34;工作正常，没有例外。

5）我只有在使用扩展程序保存时才会出现异常＆＃34; filename.doc＆＃34; ，这也仅适用于＆＃34; .doc＆＃34;和＆＃34; .docx＆＃34;文件类型。

这是代码

StorageFolder fileFolder = await HelperFunctions.GetSubFolder(4);
        fileName = fileName + file.FileType;
        StorageFile storageFile = await fileFolder.CreateFileAsync(fileName);
        IRandomAccessStream fileStream = await file.OpenAsync(FileAccessMode.Read);

        using (IRandomAccessStream tempStream = await storageFile.OpenAsync(FileAccessMode.ReadWrite))
        {
            await RandomAccessStream.CopyAndCloseAsync(fileStream.GetInputStreamAt(0), tempStream.GetOutputStreamAt(0));
        }

这是GetSubFolder方法

     public static async Task<StorageFolder> GetSubFolder(int type)
        {
            StorageFolder mainFolder = ApplicationData.Current.LocalFolder;
            Storage

            Folder subFolder;

        if (type == 0)
        {
            var result = await mainFolder.TryGetItemAsync(Constants.TextNotesFilesFolderName);

            //creating seperate folder for text files if not exist
            if (result == null)
                subFolder = await mainFolder.CreateFolderAsync(Constants.TextNotesFilesFolderName);
            else
                subFolder = await mainFolder.GetFolderAsync(Constants.TextNotesFilesFolderName);

            return subFolder;
        }
        else if (type == 1)
        {
            var result = await mainFolder.TryGetItemAsync(Constants.AudioFilesFolderName);

            //creating seperate folder for audio files if not exist
            if (result == null)
                subFolder = await mainFolder.CreateFolderAsync(Constants.AudioFilesFolderName);
            else
                subFolder = await mainFolder.GetFolderAsync(Constants.AudioFilesFolderName);

            return subFolder;
        }
        else if (type == 2)
        {
            var result = await mainFolder.TryGetItemAsync(Constants.ImageFilesFolderName);

            //creating seperate folder for image files if not exist
            if (result == null)
                subFolder = await mainFolder.CreateFolderAsync(Constants.ImageFilesFolderName);
            else
                subFolder = await mainFolder.GetFolderAsync(Constants.ImageFilesFolderName);

            return subFolder;
        }
        else if (type == 3)
        {
            var result = await mainFolder.TryGetItemAsync(Constants.ChecklistFilesFolderName);

            //creating seperate folder for checklist files if not exist
            if (result == null)
                subFolder = await mainFolder.CreateFolderAsync(Constants.ChecklistFilesFolderName);
            else
                subFolder = await mainFolder.GetFolderAsync(Constants.ChecklistFilesFolderName);

            return subFolder;
        }

        else
        {
            var result = await mainFolder.TryGetItemAsync(Constants.FileCardsFolderName);

            //creating seperate folder for text files if not exist
            if (result == null)
                subFolder = await mainFolder.CreateFolderAsync(Constants.FileCardsFolderName);
            else
                subFolder = await mainFolder.GetFolderAsync(Constants.FileCardsFolderName);

            return subFolder;
        }
    }

任何人都可以帮我解决这个问题。提前致谢， Noorul。

storageFolder.CreateFileAsync抛出UnauthorizedAccessException

0 个答案: