如何将字节数组追加到现有的StorageFile? [英] How to append array of bytes to the existed StorageFile?

问题描述

我需要相应地(在我的Metro应用程序中)按字节块写入文件数据，并且存在一个类FileIO，其中包含方法AppendTextAsync和WriteBytesAsync，但没有需要的AppendBytesAsync，所以我该如何追加StorageFile的字节数组?

I need to write to a file data by chunks of bytes consequentially (in my Metro app) and there is a class FileIO with methods AppendTextAsync and WriteBytesAsync but without needed AppendBytesAsync so how can I append an array of bytes to a StorageFile?

推荐答案

此代码似乎对我有用:

String s = "hello";
Byte[] bytes = Encoding.UTF8.GetBytes(s);

using (Stream f = await ApplicationData.Current.LocalFolder.OpenStreamForWriteAsync
    ("hello.txt", CreationCollisionOption.OpenIfExists))
{
    f.Seek(0, SeekOrigin.End);
    await f.WriteAsync(bytes, 0, bytes.Length);
}

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