public string API_id = "3333"; //你的ID
public string API_record = null; 
public string API_record_format = null; 
public string API_record_HZ = null;
public string API_key = "geovindu"; //你的KEY
public string API_secret_key = "geovindu"; //你的SECRRET_KEY
public string API_language = null; 
public string API_access_token = null; 
public string strJSON = ""; 
private const string tex = "远去的山河沉寂，恋过的风景如昔."    
"苍何斩落了情迷，生死轻付了别离."    
"捣一脉相思成泥，沐四海悲风无迹."    
"往生海烟波又起，妙华镜风雪共历.";
/// <summary>
/// 
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void Page_Load(object sender, EventArgs e)
{
}
/// <summary>
/// 
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void Button1_Click(object sender, EventArgs e)
{
API_access_token = getStrAccess(API_key, API_secret_key);
Guid cid = new Guid();
Response.Redirect("http://tsn.baidu.com/text2audio?tex="   tex   "&lan=zh&cuid="   cid.ToString()   "&ctp=1&tok="   API_access_token);
}
/// <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)
{
Response.Write(ex.ToString());
}
JObject jo = JObject.Parse(access_html);
access_token = jo["access_token"].ToString();//得到返回的toke             
return access_token;
}