基于c#实现网站的自动登陆

实现校园网的网关自动认证。

从网上找到了两种思路：一种是模拟网站的点击动作，实现自动登录。第二种是自动向登录目标发送登陆字符串。

下面是源码：

第一种：

           //webBrowser1.Url =new Uri("http://);

            ////定义html元素 通过Name获取控件值
            //HtmlElement tbUserid = webBrowser1.Document.All["DDDDD"];
            //HtmlElement tbPasswd = webBrowser1.Document.All["upass"];
            //HtmlElement btnSubmit = webBrowser1.Document.All["0MKKey"];
           
            //////定义html元素 通过ID获取控件值 (用户名 密码 登录按钮)
            ////HtmlElement tbUserid = webBrowser1.Document.GetElementById("DDDDD");
            ////HtmlElement tbPasswd = webBrowser1.Document.GetElementById("upass");
            ////HtmlElement btnSubmit = webBrowser1.Document.GetElementById("0MKKey");

            ////三个元素其一为空返回 加载后才执行赋值 否则会出现为null值的崩溃错误
            //if (tbUserid == null || tbPasswd == null || btnSubmit == null)
            //{
            //    return;
            //}
           
            ////设置元素value属性值 (用户名 密码值)
            //tbUserid.SetAttribute("value","111111");
            //tbPasswd.SetAttribute("value", "111111");
           
            ////执行元素的方法：如click submit
            //btnSubmit.InvokeMember("click");    

 

第二种：

          string username = "11";//用户名
            string password = "1111";//密码
            //新建一个用于保存cookies的容器    
            CookieContainer container = new CookieContainer();
            //拼接post数据DDDDD=11&upass=1111&0MKKey=%C1%AC%BD%D3%CD%F8%C2%E7
            string postData = ("DDDDD=" + username);
            postData += ("&upass=" + password);
            postData += ("&0MKKey=%C1%AC%BD%D3%CD%F8%C2%E7");
           ASCIIEncoding encoding = new ASCIIEncoding();
           byte[] data = encoding.GetBytes(postData);
           HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://");
           request.Method = "Post";
            request.ContentType = "application/x-www-form-urlencoded";
           request.ContentLength = data.Length;
           request.KeepAlive = true;
           request.CookieContainer = container;  //返回的cookie会附加在这个容器里面
            //发送数据
           Stream newStream = request.GetRequestStream();
            newStream.Write(data, 0, data.Length);
            newStream.Close();
           ////以下俩句不可缺少
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            response.Cookies = container.GetCookies(request.RequestUri);

            StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);
            string content = reader.ReadToEnd();
            textBox3.Text = content;