using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Data;

 using System.Drawing;

 using System.Text;

 using System.Windows.Forms;

 using System.Net;

 using System.IO;

 using System.Threading;

 namespace TestBaiDuAudio2Txt

 {

     public partial class Form1 : Form

     {

         string token = "";

         string filename = Application.StartupPath + "\\3.wav";

         string apiKey = "";//对应百度云界面基本信息的API Key

         string secretKey = "";//对应百度云界面基本信息的Secret Key

         string cuid = "";//这个随便写  不过尽量写唯一的，比如自己创建个guid，或者你手机号码什么的都可以

         string getTokenURL = "";

         string serverURL = "http://vop.baidu.com/server_api";

         public Form1()

         {

             InitializeComponent();

             cuid = Guid.NewGuid().ToString();

            //   getToken();

          //   Post();

         }

         //这个方法得到一个密钥，这个密钥可以使用1个月，1个月之后要重新请求一次获得一个

         private void getToken()

         {

             getTokenURL = "https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials" +

             "&client_id=" + apiKey + "&client_secret=" + secretKey;

             token = GetValue("access_token");

         }

         private string GetValue(string key)

         {

             HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(getTokenURL);

             HttpWebResponse response = (HttpWebResponse)request.GetResponse();

             StreamReader reader1 = new StreamReader(response.GetResponseStream(), Encoding.UTF8);

             string ssss = reader1.ReadToEnd().Replace("\"", "").Replace("{", "").Replace("}", "").Replace("\n", "");

             string[] indexs = ssss.Split(',');

             foreach (string index in indexs)

             {

                 string[] _indexs = index.Split(':');

                 if (_indexs[] == key)

                     return _indexs[];

             }

             return "";

         }

         private void Post()

         {

             serverURL += "?lan=en&cuid=kwwwvagaa&token=" + token;

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

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

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

             fs.Close();

             fs.Dispose();

             HttpWebRequest request = null;

             Uri uri = new Uri(serverURL);

             request = (HttpWebRequest)WebRequest.Create(uri);

             request.Timeout = ;

             request.Method = "POST";

             request.ContentType = "audio/wav; rate=8000";

             request.ContentLength = voice.Length;

             try

             {

                 using (Stream writeStream = request.GetRequestStream())

                 {

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

                     writeStream.Close();

                     writeStream.Dispose();

                 }

             }

             catch

             {

                 return;

             }

             string result = string.Empty;

             using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())

             {

                 using (Stream responseStream = response.GetResponseStream())

                 {

                     using (StreamReader readStream = new StreamReader(responseStream, Encoding.UTF8))

                     {

                         string line = string.Empty;

                         StringBuilder sb = new StringBuilder();

                         while (!readStream.EndOfStream)

                         {

                             line = readStream.ReadLine();

                             sb.Append(line);

                             sb.Append("\r");

                         }

                         // result = readStream.ReadToEnd();

                         result = sb.ToString();

                         //message = result.Substring(result.IndexOf("utterance") + 12);

                         //message = message.Substring(0, message.IndexOf("\""));

                         readStream.Close();

                         readStream.Dispose();

                         MessageBox.Show(result);

                     }

                     responseStream.Close();

                     responseStream.Dispose();

                 }

                 response.Close();

             }

             this.textBox1.BeginInvoke(new MethodInvoker(delegate()

             {

                 this.textBox1.Text = result;

             }));

         }

         private void button1_Click(object sender, EventArgs e)

         {

             Thread th = new Thread(Post);

             th.IsBackground = true;

             th.Start();

         }       

     }

 }