C#二進位位元組流尋找函數IndexOf的範例程式碼詳解

C# 二進位位元組流尋找函數IndexOf

        /// <summary>        /// 報告指定的 System.Byte[] 在此執行個體中的第一個匹配項的索引。        /// </summary>        /// <param name="srcBytes">被執行尋找的 System.Byte[]。</param>        /// <param name="searchBytes">要尋找的 System.Byte[]。</param>        /// <returns>如果找到該位元組數組，則為 searchBytes 的索引位置；如果未找到該位元組數組，則為 -1。如果 searchBytes 為 null 或者長度為0，則傳回值為 -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;        }

使用樣本：

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; }