/// <summary>
/// 读取指定长度或者一直读取到结尾流内容到字节数组;
/// </summary>
/// <param name="fs"></param>
/// <param name="length"></param>
/// <returns></returns>
public static byte[] ReadStream(Stream fs, int length = Int32.MaxValue)
{
MemoryStream ms = new MemoryStream();
StreamUtil.WriteStream(fs, ms, 0, length);
return(ms.GetBuffer());
}
/// <summary>
/// 追加文件内容到给定的流中
/// </summary>
/// <param name="fs">目的文件流</param>
/// <param name="srcFilePath">原文件，该文件内容追加到目的文件流中</param>
public static void AppendFile(FileStream fs, string srcFilePath)
{
FileStream srcfs = File.Open(srcFilePath, FileMode.Open);
StreamUtil.WriteStream(fs, srcfs);
srcfs.Close();
}
/// <summary>
/// 将本片段流中的内容写出到给定的文件流中
/// </summary>
/// <param name="destStream"></param>
/// <returns>返回成功写出的字节数量，因为目的流可能中断，所以必须返回成功写入的数据数量</returns>
public int write(Stream destStream)
{
return(StreamUtil.WriteStream(destStream, stream, start, length));
}