C# 二进制字节流查找函数IndexOf

        /// <summary>

        /// 报告指定的 System.Byte[] 在此实例中的第一个匹配项的索引。

        /// </summary>

        /// <param name="srcBytes">被运行查找的 System.Byte[]。</param>

        /// <param name="searchBytes">要查找的 System.Byte[]。</param>

        /// <returns>假设找到该字节数组。则为 searchBytes 的索引位置。假设未找到该字节数组。则为 -1。假设 searchBytes 为 null 或者长度为0。则返回值为 -1。</returns>

        internal int IndexOf(byte[] srcBytes, byte[] searchBytes)

        {

            if (srcBytes == null) { return -1; }

            if (searchBytes == null) { return -1; }

            if (srcBytes.Length == 0) { return -1; }

            if (searchBytes.Length == 0) { return -1; }

            if (srcBytes.Length < searchBytes.Length) { return -1; }

            for (int i = 0; i < srcBytes.Length - searchBytes.Length; i++)

            {

                if (srcBytes[i] == searchBytes[0])

                {

                    if (searchBytes.Length == 1) { return i; }

                    bool flag = true;

                    for (int j = 1; j < searchBytes.Length; j++)

                    {

                        if (srcBytes[i + j] != searchBytes[j])

                        {

                            flag = false;

                            break;

                        }

                    }

                    if (flag) { return i; }

                }

            }

            return -1;

        }

使用演示样例：

receiveData = new byte[1024];

int receiveLen = socket.ReceiveFrom(receiveData, ref ep);

receiveData = this.SubByte(receiveData, 0, receiveLen);

 if (this.IndexOf(receiveData, System.Text.Encoding.Unicode.GetBytes("Exec_Exit")) != -1)

{

    this.runing = false;

    break;

 }