public class Messenger  {    public Messenger()    {    }    public void Register(string message, Action callback)    {      this.Register(message, callback, null);    }    public void Register<T>(string message, Action<T> callback)    {      this.Register(message, callback, typeof(T));    }    void Register(string message, Delegate callback, Type parameterType)    {      if (String.IsNullOrEmpty(message))        throw new ArgumentException("'message' cannot be null or empty.");      if (callback == null)        throw new ArgumentNullException("callback");      this.VerifyParameterType(message, parameterType);      _messageToActionsMap.AddAction(message, callback.Target, callback.Method, parameterType);    }    [Conditional("DEBUG")]    void VerifyParameterType(string message, Type parameterType)    {      Type previouslyRegisteredParameterType = null;      if (_messageToActionsMap.TryGetParameterType(message, out previouslyRegisteredParameterType))      {        if (previouslyRegisteredParameterType != null && parameterType != null)        {          if (!previouslyRegisteredParameterType.Equals(parameterType))            throw new InvalidOperationException(string.Format(              "The registered action's parameter type is inconsistent with the previously registered actions for message '{0}'./nExpected: {1}/nAdding: {2}",              message,               previouslyRegisteredParameterType.FullName,              parameterType.FullName));        }        else        {          // One, or both, of previouslyRegisteredParameterType or callbackParameterType are null.          if (previouslyRegisteredParameterType != parameterType)  // not both null?          {            throw new TargetParameterCountException(string.Format(              "The registered action has a number of parameters inconsistent with the previously registered actions for message /"{0}/"./nExpected: {1}/nAdding: {2}",              message,              previouslyRegisteredParameterType == null ? 0 : 1,              parameterType == null ? 0 : 1));          }        }      }    }    public void NotifyColleagues(string message, object parameter)    {      if (String.IsNullOrEmpty(message))        throw new ArgumentException("'message' cannot be null or empty.");      Type registeredParameterType;      if (_messageToActionsMap.TryGetParameterType(message, out registeredParameterType))      {        if (registeredParameterType == null)          throw new TargetParameterCountException(string.Format("Cannot pass a parameter with message '{0}'. Registered action(s) expect no parameter.", message));      }      var actions = _messageToActionsMap.GetActions(message);      if (actions != null)        actions.ForEach(action => action.DynamicInvoke(parameter));    }    public void NotifyColleagues(string message)    {      if (String.IsNullOrEmpty(message))        throw new ArgumentException("'message' cannot be null or empty.");      Type registeredParameterType;      if (_messageToActionsMap.TryGetParameterType(message, out registeredParameterType))      {        if (registeredParameterType != null)          throw new TargetParameterCountException(string.Format("Must pass a parameter of type {0} with this message. Registered action(s) expect it.", registeredParameterType.FullName));      }      var actions = _messageToActionsMap.GetActions(message);      if (actions != null)        actions.ForEach(action => action.DynamicInvoke());    }       private class MessageToActionsMap    {      internal MessageToActionsMap()      {      }            internal void AddAction(string message, object target, MethodInfo method, Type actionType)      {        if (message == null)          throw new ArgumentNullException("message");        if (method == null)          throw new ArgumentNullException("method");        lock (_map)        {          if (!_map.ContainsKey(message))            _map[message] = new List<WeakAction>();          _map[message].Add(new WeakAction(target, method, actionType));        }      }      internal List<Delegate> GetActions(string message)      {        if (message == null)          throw new ArgumentNullException("message");        List<Delegate> actions;        lock (_map)        {          if (!_map.ContainsKey(message))            return null;          List<WeakAction> weakActions = _map[message];          actions = new List<Delegate>(weakActions.Count);          for (int i = weakActions.Count - 1; i > -1; --i)          {            WeakAction weakAction = weakActions[i];            if (weakAction == null)              continue;            Delegate action = weakAction.CreateAction();            if (action != null)            {              actions.Add(action);            }            else            {              // The target object is dead, so get rid of the weak action.              weakActions.Remove(weakAction);            }          }          // Delete the list from the map if it is now empty.          if (weakActions.Count == 0)            _map.Remove(message);        }        // Reverse the list to ensure the callbacks are invoked in the order they were registered.        actions.Reverse();        return actions;      }      internal bool TryGetParameterType(string message, out Type parameterType)      {        if (message == null)          throw new ArgumentNullException("message");        parameterType = null;        List<WeakAction> weakActions;        lock (_map)        {          if (!_map.TryGetValue(message, out weakActions) || weakActions.Count == 0)            return false;        }        parameterType = weakActions[0].ParameterType;        return true;      }      readonly Dictionary<string, List<WeakAction>> _map = new Dictionary<string, List<WeakAction>>();    }       private class WeakAction    {            internal WeakAction(object target, MethodInfo method, Type parameterType)      {        if (target == null)        {          _targetRef = null;        }        else        {          _targetRef = new WeakReference(target);        }        _method = method;        this.ParameterType = parameterType;        if (parameterType == null)        {          _delegateType = typeof(Action);        }        else        {          _delegateType = typeof(Action<>).MakeGenericType(parameterType);        }      }      internal Delegate CreateAction()      {        // Rehydrate into a real Action object, so that the method can be invoked.        if (_targetRef == null)        {          return Delegate.CreateDelegate(_delegateType, _method);        }        else        {          try          {            object target = _targetRef.Target;            if (target != null)              return Delegate.CreateDelegate(_delegateType, target, _method);          }          catch          {          }        }        return null;      }      internal readonly Type ParameterType;      readonly Type _delegateType;      readonly MethodInfo _method;      readonly WeakReference _targetRef;    }    readonly MessageToActionsMap _messageToActionsMap = new MessageToActionsMap();  }

public class Login12306Manager  {    private static readonly Messenger s_messenger = new Messenger();    public static Messenger SMessenger { get { return s_messenger; } }    public const string APPEND_MESSAGE = "append_message";    public static string afterLoginCookie;    private static string beforLoginCookie;    static Login12306Manager()    {      SetCertificatePolicy();    }    /// <summary>    /// 登 錄    /// </summary>    public static string Login(string userName,string password, string randomCode)    {      string resultHtml = string.Empty;      try      {        string loginRand= DoGetLoginRand();        HttpWebRequest request = (HttpWebRequest)WebRequest.Create          (@"https://dynamic.12306.cn/otsweb/loginAction.do?method=login");        request.Accept = @"text/html, application/xhtml+xml, */*";        request.UserAgent = @"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)";        request.Referer = @"https://dynamic.12306.cn/otsweb/loginAction.do?method=init";        request.ContentType = @"application/x-www-form-urlencoded";        request.Headers[HttpRequestHeader.Cookie] = beforLoginCookie;        request.Method = "POST";        byte[] buffer = new byte[0];        string parameter =@"loginRand={0}&refundLogin=N&refundFlag=Y&isClick=&form_tk=null&loginUser.user_name={1}&nameErrorFocus=&user.password={2}&passwordErrorFocus=&randCode={3}&randErrorFocus=&NDU0NzY4NA%3D%3D=Nzg4ZDAxMGNkYTZlMTRjZA%3D%3D&myversion=undefined";        parameter = string.Format(parameter, loginRand, userName, password, randomCode);        buffer = Encoding.UTF8.GetBytes(parameter);        request.ContentLength = buffer.Length;        using (Stream writer = request.GetRequestStream())        {          writer.Write(buffer, 0, buffer.Length);          writer.Flush();        }        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())        {          afterLoginCookie = response.GetResponseHeader("Set-cookie");          using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))          {            resultHtml = reader.ReadToEnd();            resultHtml = ProcessLoginResult(resultHtml);          }        }      }      catch{ }      return resultHtml;    }    /// <summary>    /// 刷新驗證碼    /// </summary>    public static string RefreshCode()    {      string randImageUrl = string.Empty;      try      {        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(string.Format(@"https://dynamic.12306.cn/otsweb/passCodeNewAction.do?module=login&rand=sjrand&{0}",          new Random().Next(10000, 1000000)));        request.Accept = @"image/png, image/svg+xml, image/*;q=0.8, */*;q=0.5";        request.UserAgent = @"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)";        request.Referer = @"https://dynamic.12306.cn/otsweb/loginAction.do?method=init";         request.Method = "GET";        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())        {          beforLoginCookie = response.GetResponseHeader("Set-cookie");          beforLoginCookie = Regex.Replace(beforLoginCookie, "path(?:[^,]+),?", "", RegexOptions.IgnoreCase);           using (Stream reader = response.GetResponseStream())          {            string path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, new Random().Next(10000, 99999) + @"loginRandCode.JPEG");            using (FileStream file = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write))            {              reader.CopyTo(file);            }            randImageUrl = path;          }        }      }      catch { }      return randImageUrl;    }    private static string DoGetLoginRand()    {      string loginRand=string.Empty;      try      {        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(@"https://dynamic.12306.cn/otsweb/loginAction.do?method=loginAysnSuggest");        request.Accept = @"application/json, text/javascript, */*";        request.UserAgent = @"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)";         request.Referer = @"https://dynamic.12306.cn/otsweb/loginAction.do?method=init";        request.Headers[HttpRequestHeader.Cookie] = beforLoginCookie;        request.Method = "POST";        byte[] buffer = new byte[0];        buffer = Encoding.UTF8.GetBytes(string.Empty);        request.ContentLength = buffer.Length;        using (Stream writer = request.GetRequestStream())        {          writer.Write(buffer, 0, buffer.Length);          writer.Flush();        }        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())        {          using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))          {            string result = reader.ReadToEnd();            var loginRandContent = JsonConvert.DeserializeObject<BeforLoginRnad>(result);            loginRand = loginRandContent.loginRand;          }        }      }      catch {}      return loginRand;    }    /// <summary>    /// 處理登錄結果    /// </summary>    /// <param name="html">登錄后返回的html文本</param>    private static string ProcessLoginResult(string html)    {      string m_msgPattern = "message[^/"]+/"(?'message'[^/"]+)/";";      string m_isLoginPatter = "isLogin//s*=//s*(?<val>.+)/n";      string m_loginUserNamePattern = "u_name//s*=//s*['/"](?<name>.+)['/"]";      if (html.Contains("請輸入正確的驗證碼"))      {        return "驗證碼錯誤";      }      else if (html.Contains("當前訪問用戶過多"))      {        return "當前訪問用戶過多,請稍后再試...";      }      else      {        var match0 = Regex.Match(html, m_msgPattern, RegexOptions.Compiled);        if (match0.Success)        {          string text = match0.Groups["message"].Value;          if (text.Contains("密碼") || text.Contains("登錄名不存在"))          {            return "用戶名或者密碼錯誤";          }          else          {           return text;          }        }        var match = Regex.Match(html, m_isLoginPatter, RegexOptions.Compiled);        if (match.Success && (match.Groups["val"].Value.Trim().ToLower() == "true"))        {          match = Regex.Match(html, m_loginUserNamePattern, RegexOptions.Compiled);          if (match.Success)          {            string name = match.Groups["name"].Value;            return "登錄成功:" + name;          }          else          {            return "登錄失敗,未知錯誤";          }        }        else        {          return "登錄失敗!!!";        }      }    }    /// <summary>    /// Sets the cert policy.    /// </summary>    private static void SetCertificatePolicy()    {      ServicePointManager.ServerCertificateValidationCallback            += RemoteCertificateValidate;    }    /// <summary>    /// Remotes the certificate validate.    /// </summary>    private static bool RemoteCertificateValidate(      object sender, X509Certificate cert,      X509Chain chain, SslPolicyErrors error)    {      SMessenger.NotifyColleagues(APPEND_MESSAGE, "信任任何證書...");      return true;    }  }  public class BeforLoginRnad  {    public string loginRand { get; set; }    public string randError { get; set; }  }

<Window x:Class="Test12306AutoLogin.MainWindow"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    Title="MainWindow">  <StackPanel>    <Grid>      <Grid.Resources>        <Style TargetType="TextBlock">          <Setter Property="FontFamily" Value="Microsoft YaHei"/>          <Setter Property="FontSize" Value="20"/>          <Setter Property="VerticalAlignment" Value="Center"/>        </Style>        <Style TargetType="TextBox">          <Setter Property="FontSize" Value="20"/>          <Setter Property="MinWidth" Value="300"/>          <Setter Property="Height" Value="50"/>          <Setter Property="VerticalAlignment" Value="Center"/>        </Style>        <Style TargetType="PasswordBox">          <Setter Property="FontSize" Value="20"/>          <Setter Property="MinWidth" Value="300"/>          <Setter Property="Height" Value="50"/>          <Setter Property="VerticalAlignment" Value="Center"/>        </Style>      </Grid.Resources>      <Grid.RowDefinitions>        <RowDefinition Height="auto"/>        <RowDefinition Height="auto"/>        <RowDefinition Height="auto"/>        <RowDefinition Height="auto"/>      </Grid.RowDefinitions>      <Grid.ColumnDefinitions>        <ColumnDefinition Width="auto"/>        <ColumnDefinition Width="auto"/>      </Grid.ColumnDefinitions>      <TextBlock Grid.Row="0" Grid.Column="0" Text="用戶名："/>      <TextBox Grid.Row="0" Grid.Column="1" x:Name="txtUserName"/>      <TextBlock Grid.Row="1" Grid.Column="0" Text="密 碼："/>      <PasswordBox Grid.Row="1" Grid.Column="1" x:Name="txtPassword"/>      <TextBlock Grid.Row="3" Grid.Column="0" Text="驗證碼"/>      <StackPanel Grid.Row="3" Grid.Column="1" Orientation="Horizontal"            VerticalAlignment="Center">        <TextBox x:Name="txtRandCode" Width="150"/>        <Image x:Name="imageRandCode" Width="70"/>        <Button Content="刷新驗證碼" Height="30" Width="80" Click="ButtonRefreshRandCode_Click" />      </StackPanel>    </Grid>    <Button Content="登 錄" Width="150" Height="50" Click="ButtonLogin_Click" />    <RichTextBox x:Name="rtxResultContent" MinHeight="200"/>  </StackPanel></Window>

public partial class MainWindow : Window  {    public MainWindow()    {      InitializeComponent();      this.Loaded += new RoutedEventHandler(MainWindow_Loaded);    }    void MainWindow_Loaded(object sender, RoutedEventArgs e)    {      DoRefreshRandCode();    }    private void DoRefreshRandCode()    {      string imageRandUrl = Login12306Manager.RefreshCode();      if (File.Exists(imageRandUrl))      {        ImageSource src = (ImageSource)(new ImageSourceConverter().ConvertFromString(imageRandUrl));        this.imageRandCode.Source = src;      }      this.txtRandCode.Text = string.Empty;    }    /// <summary>    /// 登錄    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    private void ButtonLogin_Click(object sender, RoutedEventArgs e)    {      string userName = this.txtUserName.Text;      string password = this.txtPassword.Password;      string randCode = this.txtRandCode.Text;      if (string.IsNullOrEmpty(userName) || string.IsNullOrEmpty(password) || string.IsNullOrEmpty(randCode))      {        MessageBox.Show("請填寫完整信息");        return;      }      string html = Login12306Manager.Login(userName, password, randCode);      System.Windows.Documents.FlowDocument doc = this.rtxResultContent.Document;      doc.Blocks.Clear();      this.rtxResultContent.AppendText(html);     }    /// <summary>    /// 刷新驗證碼    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    private void ButtonRefreshRandCode_Click(object sender, RoutedEventArgs e)    {      DoRefreshRandCode();    }  }