c# - UWP : byte[] to file

Question

我有一个byte[]，我想将它存储到一个文件中。这是我的代码:

using System.Runtime.InteropServices.WindowsRuntime;

StorageFolder folder = await GetStorageFolderFromFilePath(filePath);
StorageFile file = await folder.CreateFileAsync(Path.GetFileName(filePath), CreationCollisionOption.ReplaceExisting);

using (Stream stream = await file.OpenStreamForWriteAsync())
{
    IBuffer buffer = byteArray.AsBuffer();
    await FileIO.WriteBufferAsync(file, buffer);
}

文件已创建，但文件为空。我做错了什么？

Answer 1

为什么不使用 FileIO.WriteBytesAsync 方法？

public static IAsyncAction WriteBytesAsync(IStorageFile file, System.Byte[] buffer);

你可以在一行代码中完成:

await FileIO.WriteBytesAsync(storageFile, byteArray);