163邮箱自动登录

在winform窗体上，放一个WebBrowser控件，就行了。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            HtmlDocument doc = webBrowser1.Document;
            HtmlElement btn = null;
            foreach (HtmlElement em in doc.All)
            {
                string str = em.Name;

                if (str.Length < 1)
                    {
                        str = em.Id;
                    }
                if ((str == "username") || (str == "password") || (str == "登录邮箱"))
                {
                    switch (str)
                    {
                        case "username": em.SetAttribute("value", "liukuo.lk"); break;
                        case "password": em.SetAttribute("value", "123456"); break;
                        case "登录邮箱": btn = em; break;
                        default: break;
                    }
                }
            }
            btn.InvokeMember("click");
            doc.Forms["login163"].InvokeMember("登录邮箱");
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            webBrowser1.Navigate("http://mail.163.com/");
        }
    }
}

用户名和密码要写成你自己的邮箱用户名和密码，这样才能登陆邮箱。

完成程序下载

webBrowser1执行js:
  HtmlDocument doc = webBrowser1.Document;

  doc.InvokeScript("submitForm", new object[] { });

webBrowser1增加post数据：

 HtmlElement add = doc.CreateElement("<input name='bssCredentials.operatorId' value='" + value + "' />");
 doc.Forms["loginForm"].AppendChild(add);

查看Post数据

引用system32下SHDocVw.dll

Form_Load()里面：

 SHDocVw.WebBrowser wb = (SHDocVw.WebBrowser)webBrowser1.ActiveXInstance;
            wb.BeforeNavigate2 += new DWebBrowserEvents2_BeforeNavigate2EventHandler(WebBrowser_BeforeNavigate2);

       private void WebBrowser_BeforeNavigate2(object pDisp, ref object URL, ref object Flags, ref object TargetFrameName, ref object PostData, ref object Headers, ref bool Cancel)
        {
            string postDataText = System.Text.Encoding.ASCII.GetString(PostData as byte[]);
        }