C#http完整客户端（webform）实例演⽰1 . 新建http 客户端处理类HttpUitls.cs  该类指定放在webform ⽹站项⽬ App_Code⽂件夹下
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
namespace Http_客户1
{
public class HttpUitls
{
public static string Get(string Url)
ajax实例 文件浏览{
//System.GC.Collect();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
request.Proxy = null;
request.KeepAlive = false;
request.Method = "GET";
//request.ContentType = "application/json; charset=UTF-8";
request.ContentType = "application/x-www-form-urlencoded";//窗体数据被编码为名称/值对形式
request.AutomaticDecompression = DecompressionMethods.GZip;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
string retString = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
if (response != null)
{
response.Close();
}
if (request != null)
return retString;
}
/// <summary>
/// Post请求可⽤
/// </summary>
/// <param name="Url"></param>
/// <param name="Data"></param>
/// <param name="Referer"></param>
/// <returns></returns>
public static string Post(string Url, string Data, string Referer)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
request.Method = "POST";
request.Referer = Referer;
//request.Proxy = new WebProxy("192.168.1.12",80);
byte[] bytes = Encoding.UTF8.GetBytes(Data);
request.ContentType = "application/json; charset=UTF-8"; ;//窗体数据被编码为名称/值对形式
//request.ContentType = "application/json";
request.ContentLength = bytes.Length;
Stream myResponseStream = request.GetRequestStream();
myResponseStream.Write(bytes, 0, bytes.Length);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader myStreamReader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);            string retString = myStreamReader.ReadToEnd();
//Task<string> retString = myStreamReader.ReadToEndAsync();
myStreamReader.Close();
myResponseStream.Close();
if (response != null)
{
response.Close();
}
if (request != null)
return retString.ToString();
}
}
}
2 前端页⾯代码，Index.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Index.aspx.cs" Inherits="Index" %> <!DOCTYPE html>
<html xmlns="/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>测试⽹站</title>
<script src="JS/jquery.min.js"></script>
<script src="JS/jquery-2.1.1.js"></script>
<script type="text/javascript">
$(function () {
$("#btn1").click(function () {
var txtparam1 = $("#txtParam1").val();
var txtparam2 = $("#txtParam2").val();
$.ajax({
url: "Index.aspx/AjaxMethod",//发送到本页⾯后台AjaxMethod⽅法
type: "POST",
dataType: "json",
async: true,//async翻译为异步的，false表⽰同步，会等待执⾏完成，true为异步
contentType: "application/json; charset=utf-8",//不可少
data: "{param1:'" + txtparam1 + "',param2:'" + txtparam2 + "'}",
success: function (data) {
$("#result").html(data.d);
},
error: function () {
alert("请求出错处理");
}
});
});
});
</script>
</head>
<body>
<form id="form1" runat="server">
参数1：<input type="text" id="txtParam1" value="" /><br />
参数2：<input type="text" id="txtParam2" value="" /><br />
<input type="button" id="btn1" value="提交" /><br />
<div id="result"></div>
</form>
</body>
</html>
3 . 页⾯后台代码 Index.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Http_客户1;
using Entities;
using System.Configuration;
public partial class Index : System.Web.UI.Page
{
protected static string _Url = ConfigurationManager.ConnectionStrings["url"]==null ? "127.0.0.1:1500/Service/" : ConfigurationManager.ConnectionStrings["url"].ToString();
protected void Page_Load(object sender, EventArgs e)
{
}
public string GetResult()
{
return "";
}
/// <summary>
/// type⽅式必须是post，⽅法必须是静态的，⽅法声明要加上特性[System.Web.Services.WebMethod()]，传递的参数个数也应该和⽅法的参数相同。
/// </summary>
/// <param name="param1"></param>
/// <param name="param2"></param>
/// <returns></returns>
[System.Web.Services.WebMethod()]
public static  string AjaxMethod(string param1, string param2)
{
List<LoginInfo> loginInfos = new List<LoginInfo>() { new LoginInfo() { LoginName = param1, PassWord = param2 } };
string parames = Newtonsoft.Json.JsonConvert.SerializeObject(loginInfos);
///http请求远程服务器
var result = HttpUitls.Post(_Url, parames, null);
return result;
}
}

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