C# 获取当前电脑登录的QQ账号（最新可用）

【实例简介】

QQ账号获取器，获取在线登陆的QQ，

【实例截图】

原理：通过获取快速登录qq页面实现，如下图

【核心代码】

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

namespace QQ账号获取器
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        /// <summary>
        /// 一个全局Web控件对象
        /// </summary>
        private WebBrowser M_web;

        /// <summary>
        /// Web控件对应的Navigating事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void M_web_Navigating(object sender, WebBrowserNavigatingEventArgs e)
        {
            string url = e.Url.ToString();
        }

        /// <summary>
        /// 获取信息按钮事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Btn_HackQQ_Click(object sender, EventArgs e)
        {
            if (M_web == null)
            {
                //初始化一下Web控件（肉眼看不到的哦）
                M_web = new System.Windows.Forms.WebBrowser();
                M_web.ScriptErrorsSuppressed = true;
                M_web.Navigating  = new WebBrowserNavigatingEventHandler(M_web_Navigating);
            }

            //Web控件载入页面（这个页面就是我们用来获取QQ号的页面）
            M_web.Navigate("http://ui.ptlogin2.qq.com/cgi-bin/login?hide_title_bar=0&low_login=0&qlogin_auto_login=1&no_verifyimg=1&link_target=blank&appid=636014201&target=self&s_url=http%3A//www.qq.com/qq2012/loginSuccess.htm");
            M_web.ScriptErrorsSuppressed = true;

            while (M_web.ReadyState != WebBrowserReadyState.Complete)
            {
                Application.DoEvents();
            }
            if (M_web.ReadyState == WebBrowserReadyState.Complete)
            {
                HtmlElement target = M_web.Document.GetElementById("qlogin_list");

                if (target != null)
                {
                    target.AttachEventHandler("onpropertychange", handler);
                }
            }


           
        }

        private void handler(Object sender, EventArgs e)
        {
            HtmlElement div = M_web.Document.GetElementById("qlogin_list");
            if (div == null) return;
            String contentLoaded = div.InnerHtml; // get the content loaded via ajax

            List<string> QQNumberList = new List<string>();
            HtmlElementCollection htmlElementCollection = div.All;
            foreach (HtmlElement currentElement in htmlElementCollection)//在集合中遍历所有元素来寻找
            {
                string curstr = currentElement.OuterHtml;
                if (curstr != null)
                {
                    string idstr = currentElement.GetAttribute("id");
                    if (idstr.Contains("img_"))
                    {
                        if (curstr.ToLower().Contains("<img"))
                        {
                            //取QQ号码
                            QQNumberList.Add(Match_Str("uin=\"", "\"", curstr));
                        }
                    }
                }
            }

            Tex_OutQQNumber.Clear();

            foreach (string item in QQNumberList)
            {
                Tex_OutQQNumber.AppendText(item   "\r\n\r\n");
            }

        }



        #region 获取字符串指定头和尾之间的内容

        /// <summary>
        /// 获取字符串指定头和尾之间的内容
        /// </summary>
        /// <param name="startChar">起始字符串</param>
        /// <param name="endChar">结束字符串</param>
        /// <param name="str">主串</param>
        /// <returns></returns>
        private string Match_Str(string startChar, string endChar, string str)
        {
            try
            {
                Regex reg = new Regex("(?<="   startChar   ").*?(?="   endChar   ")", RegexOptions.IgnoreCase);
                Match m = reg.Match(str);
                if (m.Success)
                {
                    return m.ToString();
                }
            }
            catch (System.Exception ex)
            {

            }
            return "";
        }

        #endregion
    }
}