c# 发送Http 请求

新建class 命名 HttpRequest.cs，内容：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.IO;
using System.Net;

namespace yourNameSpace
{
    class HttpRequest
    {
        public static string Http(string url, string method, string data)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = string.IsNullOrEmpty(method) ? "GET" : method;
            request.ContentType = "application/json;charset=utf-8";
            if (!string.IsNullOrEmpty(data))
            {
                Stream RequestStream = request.GetRequestStream();
                byte[] bytes = Encoding.UTF8.GetBytes(data);
                RequestStream.Write(bytes, 0, bytes.Length);
                RequestStream.Close();
            }
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream ResponseStream = response.GetResponseStream();
            StreamReader StreamReader = new StreamReader(ResponseStream, Encoding.GetEncoding("utf-8"));
            string re = StreamReader.ReadToEnd();
            StreamReader.Close();
            ResponseStream.Close();
            return re;
        }
    }
}

在同命名空间下调用:

string res = HttpRequest.Http("接口地址", "GET", "");