參考資料

1.微軟官方介紹 saving and finding your files https://developer.microsoft.com/en-us/windows/mixed-reality/saving_and_finding_your_files

2.自定義文件存取方法 http://longqian.me/2017/02/08/hololens-file-transfer/

按照2中的方法，可以將文件保存在 ApplicationData.Current.RoamingFolder文件加下，這樣從網頁連接hololens時就可以拷貝出來了，比較方便。

寫入與讀取的方法可以采用uwp提供的方式，示例如下

寫入

StorageFolder folder;
        folder = ApplicationData.Current.RoamingFolder;
        StorageFile file = await folder.CreateFileAsync("position.txt", CreationCollisionOption.ReplaceExisting);
        using (StorageStreamTransaction transaction = await file.OpenTransactedWriteAsync())
        {
            
 
using (DataWriter dataWriter = new DataWriter(transaction.Stream))
            {
                dataWriter.WriteString(positionstring);
                transaction.Stream.Size = await dataWriter.StoreAsync();
                await transaction.CommitAsync();
            }
        }

讀取

StorageFolder folder;
        folder 
 
= ApplicationData.Current.RoamingFolder;
StorageFile file = await folder.TryGetItemAsync("position.txt") as StorageFile;
if (file != null)
        {
            string positionstring = await FileIO.ReadTextAsync(file);
}

讀取時用的folder.TryGetItemAsync，這個方法如果打開文件失敗的話會返回null，方便後續操作。

Hololens創建、讀取、刪除本地文件