c# stream

最新推荐文章于 2024-05-07 17:22:24 发布

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最新推荐文章于 2024-05-07 17:22:24 发布

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        /// <summary>
        /// 从流获取指定长度的字节数组
        /// </summary>
        public static IEnumerable<byte[]> GetBytes(this Stream stream, long length, int size = 1024)
        {
            byte[] buffer = new byte[size];
            int len, read;

            long sum = 0;
            do
            {
                long unread = length - sum;
                read = unread >= size ? size : (int)unread;

                len = stream.Read(buffer, 0, read);
                sum += len;

                if (buffer.Length == len)
                {
                    yield return buffer;
                }
                else
                {
                    yield return buffer.Take(len).ToArray();
                }
            } while (sum < length && len > 0);
        }