public class StringToAudio {
string token = "5561738";
string apiKey = "xUdNQCG3rHosEtTH7Ffiw4fI";
string secretKey = "EtHymbgx054QDsAAtXMIrsT1Us1PlbSB";
string cuid = "256641545456156185456489484";//生成guid
string getTokenURL = "";
string serverURL = "http://tsn.baidu.com/text2audio";
public StringToAudio()
{ cuid = Guid.NewGuid().ToString();
getToken();
}

region getToken

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[0] == key) return _indexs[1];
}
return "";
}

endregion

public string stringToAudio(string data, string fileName)
{ serverURL += "?tex=" + data + "&lan=zh&cuid=" + cuid + "&ctp=1&tok=" + token;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(serverURL));
request.Timeout = 30000;
request.Method = "GET";
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
using (Stream stream = response.GetResponseStream())
{ byte[] buffer = new byte[1024];
FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write);
int count = -1;
while (count != 0)
{
count = stream.Read(buffer,0,buffer.Length); fs.Write(buffer, 0, count);
}
fs.Flush();
fs.Close();
}
}
return fileName;
}

}