public string API_id = "8888"; //你的ID

        public string API_record = null;

        public string API_record_format = "wav";

        public string API_record_HZ = "16000";

        public string API_key = "geovindu"; //你的KEY

        public string API_secret_key = "55519"; //你的SECRRET_KEY

        public string API_language = "zh";

        public string API_access_token = null;

        public string strJSON = "";

        //录音

        [DllImport("winmm.dll", EntryPoint = "mciSendString", CharSet = CharSet.Auto)]

        public static extern int mciSendString(

         string lpstrCommand,

         string lpstrReturnString,

         int uReturnLength,

         int hwndCallback

        );

        /// <summary>

        ///

        /// </summary>

        public Form1()

        {

            InitializeComponent();

        }

        /// <summary>

        ///

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void Form1_Load(object sender, EventArgs e)

        {

            API_record=Application.StartupPath + "\\上班.wav";

            API_access_token = getStrAccess(API_key, API_secret_key);

        }

        /// <summary>

        ///

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void button1_Click(object sender, EventArgs e)

        {

            this.textBox2.Text = getStrText(API_id, API_access_token, API_language, API_record, API_record_format, API_record_HZ);

        }

        /// <summary>

        ///

        /// </summary>

        /// <param name="para_API_key">你的KEY</param>

        /// <param name="para_API_secret_key">你的SECRRET_KEY</param>

        /// <returns></returns>

        public string getStrAccess(string para_API_key, string para_API_secret_key)

        {

            //方法参数说明:

            //para_API_key:API_key(你的KEY)

            //para_API_secret_key(你的SECRRET_KEY)

            //方法返回值说明:

            //百度认证口令码,access_token

            string access_html = null;

            string access_token = null;

            string getAccessUrl = "https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials" +"&client_id=" + para_API_key + "&client_secret=" + para_API_secret_key;

            try

            {

                HttpWebRequest getAccessRequest = WebRequest.Create(getAccessUrl) as HttpWebRequest;

                //getAccessRequest.Proxy = null;

                getAccessRequest.ContentType = "multipart/form-data";

                getAccessRequest.Accept = "*/*";

                getAccessRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)";

                getAccessRequest.Timeout = 30000;//30秒连接不成功就中断

                getAccessRequest.Method = "post";

                HttpWebResponse response = getAccessRequest.GetResponse() as HttpWebResponse;

                using (StreamReader strHttpComback = new StreamReader(response.GetResponseStream(), Encoding.UTF8))

                {

                    access_html = strHttpComback.ReadToEnd();

                }

            }

            catch (WebException ex)

            {

                MessageBox.Show(ex.ToString());

            }

            JObject jo = JObject.Parse(access_html);

            access_token = jo["access_token"].ToString();//得到返回的toke

            return access_token;

        }

        /// <summary>

        ///

        /// </summary>

        /// <param name="para_API_id"></param>

        /// <param name="para_API_access_token"></param>

        /// <param name="para_API_language"></param>

        /// <param name="para_API_record"></param>

        /// <param name="para_format"></param>

        /// <param name="para_Hz"></param>

        /// <returns></returns>

        public string getStrText(string para_API_id, string para_API_access_token, string para_API_language, string para_API_record, string para_format, string para_Hz)

        {

            //方法参数说明:

            //para_API_id: API_id (你的ID)

            //para_API_access_token (getStrAccess(...)方法得到的access_token口令)

            //para_API_language (你要识别的语言,zh,en,ct)

            //para_API_record(语音文件的路径)

            //para_format(语音文件的格式)

            //para_Hz(语音文件的采样率 16000或者8000) 

            //该方法返回值:

            //该方法执行正确返回值是语音翻译的文本,错误是错误号,可以去看百度语音文档,查看对应错误

            string strText = null;

            string error = null;

            FileInfo fi = new FileInfo(para_API_record);

            FileStream fs = new FileStream(para_API_record, FileMode.Open);

            byte[] voice = new byte[fs.Length];

            fs.Read(voice, 0, voice.Length);

            fs.Close(); 

            string getTextUrl = "http://vop.baidu.com/server_api?lan=" + para_API_language + "&cuid=" + para_API_id + "&token=" + para_API_access_token;

            HttpWebRequest getTextRequst = WebRequest.Create(getTextUrl) as HttpWebRequest; 

           /* getTextRequst.Proxy = null;

            getTextRequst.ServicePoint.Expect100Continue = false;

            getTextRequst.ServicePoint.UseNagleAlgorithm = false;

            getTextRequst.ServicePoint.ConnectionLimit = 65500;

            getTextRequst.AllowWriteStreamBuffering = false;*/ 

            getTextRequst.ContentType = "audio /"+para_format+";rate="+para_Hz;

            getTextRequst.ContentLength = fi.Length;

            getTextRequst.Method = "post";

            getTextRequst.Accept = "*/*";

            getTextRequst.KeepAlive = true;

            getTextRequst.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)";

            getTextRequst.Timeout = 30000;//30秒连接不成功就中断

            using (Stream writeStream = getTextRequst.GetRequestStream())

            {

                writeStream.Write(voice, 0, voice.Length);

            } 

            HttpWebResponse getTextResponse = getTextRequst.GetResponse() as HttpWebResponse;

            using (StreamReader strHttpText = new StreamReader(getTextResponse.GetResponseStream(), Encoding.UTF8))

            {

                strJSON = strHttpText.ReadToEnd();

            } 

            JObject jsons = JObject.Parse(strJSON);//解析JSON  

            if (jsons["err_msg"].Value<string>() == "success.")

            {

                    strText = jsons["result"][0].ToString();

                    return strText;

            }

            else

            {

                    error = jsons["err_no"].Value<string>() + jsons["err_msg"].Value<string>();

                    return error;

            } 

        }