.net+jquery+ashx实现客户端模拟登陆扩展

namespace LoginApp
{
    partial class Form1
    {
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗体设计器生成的代码

        /// <summary>
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.txtPwd = new System.Windows.Forms.TextBox();
            this.txtUserName = new System.Windows.Forms.TextBox();
            this.label2 = new System.Windows.Forms.Label();
            this.label1 = new System.Windows.Forms.Label();
            this.btnClose = new System.Windows.Forms.Button();
            this.btnLogin = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // txtPwd
            // 
            this.txtPwd.Location = new System.Drawing.Point(191, 100);
            this.txtPwd.Margin = new System.Windows.Forms.Padding(4);
            this.txtPwd.Name = "txtPwd";
            this.txtPwd.PasswordChar = ‘*‘;
            this.txtPwd.Size = new System.Drawing.Size(124, 25);
            this.txtPwd.TabIndex = 11;
            this.txtPwd.Text = "admin";
            // 
            // txtUserName
            // 
            this.txtUserName.Location = new System.Drawing.Point(191, 55);
            this.txtUserName.Margin = new System.Windows.Forms.Padding(4);
            this.txtUserName.Name = "txtUserName";
            this.txtUserName.Size = new System.Drawing.Size(124, 25);
            this.txtUserName.TabIndex = 10;
            this.txtUserName.Text = "admin";
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(78, 100);
            this.label2.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(37, 15);
            this.label2.TabIndex = 9;
            this.label2.Text = "密码";
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(78, 55);
            this.label1.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(52, 15);
            this.label1.TabIndex = 8;
            this.label1.Text = "用户名";
            // 
            // btnClose
            // 
            this.btnClose.Location = new System.Drawing.Point(207, 168);
            this.btnClose.Margin = new System.Windows.Forms.Padding(4);
            this.btnClose.Name = "btnClose";
            this.btnClose.Size = new System.Drawing.Size(125, 29);
            this.btnClose.TabIndex = 7;
            this.btnClose.Text = "关闭";
            this.btnClose.UseVisualStyleBackColor = true;
            this.btnClose.Click += new System.EventHandler(this.btnClose_Click);
            // 
            // btnLogin
            // 
            this.btnLogin.Location = new System.Drawing.Point(55, 168);
            this.btnLogin.Margin = new System.Windows.Forms.Padding(4);
            this.btnLogin.Name = "btnLogin";
            this.btnLogin.Size = new System.Drawing.Size(125, 29);
            this.btnLogin.TabIndex = 6;
            this.btnLogin.Text = "登录";
            this.btnLogin.UseVisualStyleBackColor = true;
            this.btnLogin.Click += new System.EventHandler(this.btnLogin_Click);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 15F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(387, 253);
            this.Controls.Add(this.txtPwd);
            this.Controls.Add(this.txtUserName);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.btnClose);
            this.Controls.Add(this.btnLogin);
            this.Name = "Form1";
            this.Text = "登录";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.TextBox txtPwd;
        private System.Windows.Forms.TextBox txtUserName;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Button btnClose;
        private System.Windows.Forms.Button btnLogin;
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace LoginApp
{
    public partial class Form1 : Form
    {
        string strURL = "http://localhost:50229/Ashx/Login.ashx";
        public Form1()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 登录
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnLogin_Click(object sender, EventArgs e)
        {
            string name = this.txtUserName.Text.Trim();
            string pwd = this.txtPwd.Text.Trim();
            // string postData = name;//要提交的数据
            //GetPage(strURL, postData);
            //定义返回json数据 解析json数据并显示信息到窗体控件值上
            // string jsoncontent = GetPage(strURL, postData);

            //List<Custerm> CustermList = JsonConvert.DeserializeObject<List<Custerm>>(jsoncontent);

            //foreach (Custerm custerm in CustermList)
            //{

            //    this.txtName.Text = custerm.CustermName;
            //}  

            StringBuilder sb = new StringBuilder();
            sb.AppendFormat("name={0}&pwd={1}", name, pwd);
            string result = GetPage(strURL, sb.ToString());
            switch (result)
            {
                case "1":
                    MessageBox.Show("登录成功！");
                    break;
                case "2":
                    MessageBox.Show("登录失败！");
                    break;
                default:
                    MessageBox.Show("登录参数错误！");
                    break;
            }
        }

        /// <summary>  
        /// Post数据到web服务端  
        /// </summary>  
        /// <param name="strURL">网址</param>  
        /// <param name="postData">参数</param>  
        /// <returns></returns>  
        public string GetPage(string strURL, string postData)
        {
            Stream outstream = null;
            Stream instream = null;
            StreamReader sr = null;
            HttpWebResponse response = null;
            HttpWebRequest request = null;
            Encoding encoding = System.Text.Encoding.GetEncoding("UTF-8");
            
            byte[] data = encoding.GetBytes(postData);
            // 准备请求...  
            try
            {
                // 设置参数  
                request = WebRequest.Create(strURL) as HttpWebRequest;
                CookieContainer cookieContainer = new CookieContainer();
                request.CookieContainer = cookieContainer;
                request.AllowAutoRedirect = true;
                //Post请求方式
                request.Method = "POST";
                //是否保持常连接
                request.KeepAlive = false;
                request.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E)";
                //内容类型
                request.ContentType = "application/x-www-form-urlencoded";
                //表示请求消息正文的长度
                request.ContentLength = data.Length;
                outstream = request.GetRequestStream();
                //send the data//将传输的数据，请求正文写入请求流
                outstream.Write(data, 0, data.Length);
                outstream.Close();
                //发送请求并获取相应回应数据  
                response = request.GetResponse() as HttpWebResponse;
                //直到request.GetResponse()程序才开始向目标网页发送Post请求  
                instream = response.GetResponseStream();//获得请求流
                sr = new StreamReader(instream, encoding);
                //返回结果网页（html）代码  
                string content = sr.ReadToEnd();
                Console.WriteLine(content);
                string err = string.Empty;
                return content;

            }
            catch (Exception ex)
            {
                string err = ex.Message;
                return string.Empty;
            }
        }       
        /// <summary>
        /// 关闭
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnClose_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>系统登录</title>
    <script type="text/javascript" src="Scripts/jquery-1.11.0.js"></script>
    <script type="text/javascript">
        $(function () {
            $("#btnLogin").click(function () {
                var name = $("#txtUserName").val();
                var pwd = $("#txtPwd").val();
                $.ajax({
                    url: "Ashx/Login.ashx",
                    data: "name=" + name + "&pwd=" + pwd,
                    type: "Post",
                    dataType: "text",
                    success: function (msg) {
                        if (msg == "1") {
                            $("#divMsg").html("登录成功！");
                        } else {
                            $("#divMsg").html("登录失败！");
                        }
                    }


                });
            });
        });
    </script>
</head>
<body>
    <div style="text-align:center;">
        <table>
            <tr>
                <td>用户名：</td>
                <td><input type="text" id="txtUserName" name="name" value="admin" /></td>
            </tr>
            <tr>
                <td>密码：</td>
                <td><input type="password" id="txtPwd" name="name" value="admin" /></td>
            </tr>
            <tr>
                <td colspan="2"><input type="button" id="btnLogin" name="name" value="登录" /></td>
            </tr>
        </table>
        <div id="divMsg"></div>
    </div>
</body>
</html>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace LoginWebApp.Ashx
{
    /// <summary>
    /// Login 的摘要说明
    /// </summary>
    public class Login : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            //接收客户端传送过来的用户名和密码
            string name = context.Request["name"];
            string pwd = context.Request["pwd"];
            Userinfo info = new Userinfo();
            if (string.IsNullOrEmpty(name) || string.IsNullOrEmpty(pwd))
            {
                context.Response.Write("2");
                //登录失败
            }
            else
            { 
                if (name == "admin" && pwd == "admin")
                {
                    //登录成功记入cookie
                    context.Response.Cookies["n"].Value = name;
                    context.Response.Cookies["n"].Expires = DateTime.Now.AddDays(7);
                    context.Response.Cookies["p"].Value = pwd;
                    context.Response.Cookies["p"].Expires = DateTime.Now.AddDays(7);
                    context.Response.Write("1");
                    //登陆成功
                }
                else
                {
                    context.Response.Write("2");
                }
            }
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}