public string GetAnswer()
        {
            uint resultLen = 0;

            while (recStatus != (int)RecStatus.MSP_REC_STATUS_COMPLETE)
            {
                Thread.Sleep(500);//要等到服务端生成结果,避免重复调用,因此建议异步使用
                IntPtr result = ISEDLL.QISEGetResult(SessionID, ref resultLen, ref _recstatus, ref errorCode);
                if (recStatus == (int)RecStatus.MSP_REC_STATUS_COMPLETE)
                {
                    return(UnmanagedManager.GetStringFromUnmanagedMemory(result));
                }
            }
            return("null");
        }
        public void Login(string appid)
        {
            string lgi_param = "appid = {0}";

            lgi_param = string.Format(lgi_param, appid);
            errorCode = ISEDLL.MSPLogin(null, null, lgi_param);
            if (errorCode == (int)ErrorCode.MSP_SUCCESS)
            {
                string ise_ssb_param = "sub=ise,category=read_sentence,language=en_us,aue=speex-wb;7,auf=audio/L16;rate=16000";
                var    hSessionID    = ISEDLL.QISESessionBegin(ise_ssb_param, null, ref errorCode);
                if (errorCode == (int)ErrorCode.MSP_SUCCESS)
                {
                    SessionID = UnmanagedManager.GetStringFromUnmanagedMemory(hSessionID);
                }
            }
        }