C# Post Json数据

public string Post(string Url, string jsonParas)

{

string strURL = Url;

//创建一个HTTP请求

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

//Post请求方式

request.Method = "POST";

//内容类型

request.ContentType = "application/x-www-form-urlencoded";

//设置参数，并进行URL编码

string paraUrlCoded = jsonParas;//System.Web.HttpUtility.UrlEncode(jsonParas);

byte[] payload;

//将Json字符串转化为字节

payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);

//设置请求的ContentLength

request.ContentLength = payload.Length;

//发送请求，获得请求流

Stream writer;

try

{

writer = request.GetRequestStream();//获取用于写入请求数据的Stream对象

}

catch (Exception)

{

writer = null;

Console.Write("连接服务器失败!");

}

//将请求参数写入流

writer.Write(payload, 0, payload.Length);

writer.Close();//关闭请求流

String strValue = "";//strValue为http响应所返回的字符流

HttpWebResponse response;

try

{

//获得响应流

response = (HttpWebResponse)request.GetResponse();

}

catch (WebException ex)

{

response = ex.Response as HttpWebResponse;

}

Stream s = response.GetResponseStream();

Stream postData = Request.InputStream;

StreamReader sRead = new StreamReader(s);

string postContent = sRead.ReadToEnd();

sRead.Close();

return postContent;//返回Json数据

}

//接收

//获取post过来的json数据结构

Stream postData = Request.InputStream;

StreamReader sRead = new StreamReader(postData);

string postContent = sRead.ReadToEnd();

sRead.Close();