ASP.NET MVC 1.0 Application Template CAPTCHA C# Code Sample (BotDetect v3.0; deprecated)

The ASP.NET MVC 1.0 application template Captcha sample project shows how to use the BotDetect CAPTCHA MvcCaptcha control in ASP.NET MVC 1.0 web applications.

First Time Here?

Check the BotDetect ASP.NET MVC Captcha Quickstart for key integration steps.

Starting with the default ASP.NET MVC 1.0 Visual Studio 2008 project template, the sample includes all code required to add CAPTCHA validation to the Account controller Register action.

The sample remembers when the CAPTCHA is successfully solved within a single registration, and doesn't display it again if there are errors with other form values (the username, for example).

You can get a new CAPTCHA using the Register action link in the top right corner of the page, and see the explanation in the Account controller code.

→ ASP.NET MVC version:

→ .NET programming language:

Installed Location

By default, the .NET 3.5 C# version of the ASP.NET MVC 1.0 application template Captcha sample project is installed at:
C:\Program Files\Lanapsoft\BotDetect 3 CAPTCHA Component\Asp.Net\v3.5\WebApp\AspNetMVC10CaptchaSample\CSharp

You can also run it from the BotDetect Start Menu:
Programs > Lanapsoft > BotDetect 3 CAPTCHA Component > ASP.NET > DotNET 3.5 Web Applications > Run

Views\Account\Register.aspx

<%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" 
Inherits="System.Web.Mvc.ViewPage" %>

<asp:Content ID="registerTitle" ContentPlaceHolderID="TitleContent" 
runat="server">
    Register
</asp:Content>

<asp:Content ID="BotDetectStylesheets" ContentPlaceHolderID="includes" 
  runat="server">
    <link href="<%= BotDetect.Web.CaptchaUrls.Absolute.LayoutStyleSheetUrl %>" 
    rel="stylesheet" type="text/css" />
</asp:Content>

<asp:Content ID="registerContent" ContentPlaceHolderID="MainContent" 
runat="server">
    <h2>Create a New Account</h2>
    <p>
        Use the form below to create a new account. 
    </p>
    <p>
        Passwords are required to be a minimum of <%=Html.Encode(
        ViewData["PasswordLength"])%> characters in length.
    </p>
    <p>
        <%= Html.ValidationSummary("Account creation was unsuccessful. 
        Please correct the errors and try again.") %>
    </p>
    <% using (Html.BeginForm()) { %>
        <div>
            <fieldset id="RegisterFields">
                <legend>Account Information</legend>
                <p>
                    <label for="username">Username:</label>
                    <%= Html.TextBox("username") %>
                    <%= Html.ValidationMessage("username") %>
                </p>
                <p>
                    <label for="email">Email:</label>
                    <%= Html.TextBox("email") %>
                    <%= Html.ValidationMessage("email") %>
                </p>
                <p>
                    <label for="password">Password:</label>
                    <%= Html.Password("password") %>
                    <%= Html.ValidationMessage("password") %>
                </p>
                <p>
                    <label for="confirmPassword">Confirm password:<
                    /label>
                    <%= Html.Password("confirmPassword") %>
                    <%= Html.ValidationMessage("confirmPassword") %>
                </p>
                
                <%  MvcCaptcha registrationCaptcha = CaptchaHelper.
                  GetRegistrationCaptcha();
                    if (!registrationCaptcha.IsSolved)
                    { %>
                <%= Html.Captcha(registrationCaptcha) %>
                <p>
                    <label for="captchaCode">Please retype the 
                    characters from the picture:</label>
                    <%= Html.TextBox("captchaCode")%>
                    <%= Html.ValidationMessage("captchaCode")%>
                </p>
                <% } %>
                
                <p>
                    <input type="submit" value="Register" />
                </p>
            </fieldset>
        </div>
    <% } %>
</asp:Content>

BotDetect stylesheets are included in the generated page Header using the includes content placeholder defined in the Master page.

To keep View code simple, we delegate MvcCaptcha instance creation to a helper class, and use it along with Model fields to generate the required markup using straightforward HtmlHelper calls.

Since we want to avoid re-displaying the Captcha challenge to users after they solve it, we only call the markup generation code if the IsSolved property is not set by a previous successful Captcha validation.

[back to the top of the page]

Views\Shared\Site.Master

<%@ Master Language="C#" Inherits="System.Web.Mvc.ViewMasterPage" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title><asp:ContentPlaceHolder ID="TitleContent" runat="server" />
    </title>
    <link href="../../Content/Site.css" rel="stylesheet" 
    type="text/css" />
    <asp:ContentPlaceHolder id="includes" runat="server"></asp:
    ContentPlaceHolder>
</head>

<body>
    <div class="page">

        <div id="header">
            <div id="title">
                <h1>BotDetect CAPTCHA ASP.NET MVC 1.0 Sample</h1>
            </div>
              
            <div id="logindisplay">
                <% Html.RenderPartial("LogOnUserControl"); %>
            </div> 
            
            <div id="menucontainer">
            
                <ul id="menu">              
                    <li><%= Html.ActionLink("Home", "Index", "Home")%>
                    </li>
                    <li><%= Html.ActionLink("About", "About", "Home")%>
                    </li>
                </ul>
            
            </div>
        </div>

        <div id="main">
            <asp:ContentPlaceHolder ID="MainContent" runat="server" />

            <div id="footer">
            </div>
        </div>
    </div>
</body>
</html>

To allow easy inclusion of BotDetect stylesheets into Views which require them, the includes content placeholder should be declared in the Master page header.

[back to the top of the page]

Controllers\AccountController.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Security.Principal;
using System.Web;
using System.Web.Mvc;
using System.Web.Security;
using System.Web.UI;

using BotDetect.Web.UI.Mvc;

namespace AspNetMvc10CaptchaSampleCSharp.Controllers
{

    [HandleError]
    public class AccountController : Controller
    {

        // This constructor is used by the MVC framework to 
        instantiate the controller using
        // the default forms authentication and membership providers.

        public AccountController()
            : this(null, null)
        {
        }

        // This constructor is not used by the MVC framework but is 
        instead provided for ease
        // of unit testing this type. See the comments at the end of 
        this file for more
        // information.
        public AccountController(IFormsAuthentication formsAuth, 
        IMembershipService service)
        {
            FormsAuth = formsAuth ?? new FormsAuthenticationService();
            MembershipService = service ?? new 
            AccountMembershipService();
        }

        public IFormsAuthentication FormsAuth
        {
            get;
            private set;
        }

        public IMembershipService MembershipService
        {
            get;
            private set;
        }

        public ActionResult LogOn()
        {

            return View();
        }

        [AcceptVerbs(HttpVerbs.Post)]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.
        Design", "CA1054:UriParametersShouldNotBeStrings",
            Justification = "Needs to take same parameter type as 
            Controller.Redirect()")]
        public ActionResult LogOn(string userName, string password, 
        bool rememberMe, string returnUrl)
        {

            if (!ValidateLogOn(userName, password))
            {
                return View();
            }

            FormsAuth.SignIn(userName, rememberMe);
            if (!String.IsNullOrEmpty(returnUrl))
            {
                return Redirect(returnUrl);
            }
            else
            {
                return RedirectToAction("Index", "Home");
            }
        }

        public ActionResult LogOff()
        {

            FormsAuth.SignOut();

            return RedirectToAction("Index", "Home");
        }

        public ActionResult Register()
        {

            ViewData["PasswordLength"] = MembershipService.
            MinPasswordLength;

            // when the View is accessed directly and not posted, we 
            // clear any remembered CAPTCHA solving state. 
            // The users only have to solve the CAPTCHA once within a 
            // single registration, but if they reload the Register  
            // page later, it is shown again. 
            // Otherwise, they could register an unlimited number of 
            // accounts within a single Session after solving the 
            // CAPTCHA only  once.
            MvcCaptcha.ResetCaptcha("RegistrationCaptcha");

            return View();
        }


        [AcceptVerbs(HttpVerbs.Post)]
        [CaptchaValidation("captchaCode", "RegistrationCaptcha", "Your 
          input doesn't match displayed characters.")]
        public ActionResult Register(string userName, string email, 
        string password, string confirmPassword)
        {
            ViewData["PasswordLength"] = MembershipService.
            MinPasswordLength;

            if (ValidateRegistration(userName, email, password, 
            confirmPassword))
            {
                // Attempt to register the user
                MembershipCreateStatus createStatus = 
                MembershipService.CreateUser(userName, password, email)
                ;

                if (createStatus == MembershipCreateStatus.Success)
                {
                    FormsAuth.SignIn(userName, false /* 
                    createPersistentCookie */);
                    return RedirectToAction("Index", "Home");
                }
                else
                {
                    ModelState.AddModelError("_FORM", 
                    ErrorCodeToString(createStatus));
                }
            }

            // If we got this far, something failed, redisplay form
            return View();
        }

        [Authorize]
        public ActionResult ChangePassword()
        {

            ViewData["PasswordLength"] = MembershipService.
            MinPasswordLength;

            return View();
        }

        [Authorize]
        [AcceptVerbs(HttpVerbs.Post)]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.
        Design", "CA1031:DoNotCatchGeneralExceptionTypes",
            Justification = "Exceptions result in password not being 
            changed.")]
        public ActionResult ChangePassword(string currentPassword, 
        string newPassword, string confirmPassword)
        {

            ViewData["PasswordLength"] = MembershipService.
            MinPasswordLength;

            if (!ValidateChangePassword(currentPassword, newPassword, 
            confirmPassword))
            {
                return View();
            }

            try
            {
                if (MembershipService.ChangePassword(User.Identity.
                Name, currentPassword, newPassword))
                {
                    return RedirectToAction("ChangePasswordSuccess");
                }
                else
                {
                    ModelState.AddModelError("_FORM", "The current 
                    password is incorrect or the new password is 
                    invalid.");
                    return View();
                }
            }
            catch
            {
                ModelState.AddModelError("_FORM", "The current 
                password is incorrect or the new password is invalid.")
                ;
                return View();
            }
        }

        public ActionResult ChangePasswordSuccess()
        {

            return View();
        }

        protected override void OnActionExecuting(
        ActionExecutingContext filterContext)
        {
            if (filterContext.HttpContext.User.Identity is 
            WindowsIdentity)
            {
                throw new InvalidOperationException("Windows 
                authentication is not supported.");
            }
        }

        #region Validation Methods

        private bool ValidateChangePassword(string currentPassword, 
        string newPassword, string confirmPassword)
        {
            if (String.IsNullOrEmpty(currentPassword))
            {
                ModelState.AddModelError("currentPassword", "You must 
                specify a current password.");
            }
            if (newPassword == null || newPassword.Length < 
            MembershipService.MinPasswordLength)
            {
                ModelState.AddModelError("newPassword",
                    String.Format(CultureInfo.CurrentCulture,
                         "You must specify a new password of {0} or 
                         more characters.",
                         MembershipService.MinPasswordLength));
            }

            if (!String.Equals(newPassword, confirmPassword, 
            StringComparison.Ordinal))
            {
                ModelState.AddModelError("_FORM", "The new password 
                and confirmation password do not match.");
            }

            return ModelState.IsValid;
        }

        private bool ValidateLogOn(string userName, string password)
        {
            if (String.IsNullOrEmpty(userName))
            {
                ModelState.AddModelError("username", "You must specify 
                a username.");
            }
            if (String.IsNullOrEmpty(password))
            {
                ModelState.AddModelError("password", "You must specify 
                a password.");
            }
            if (!MembershipService.ValidateUser(userName, password))
            {
                ModelState.AddModelError("_FORM", "The username or 
                password provided is incorrect.");
            }

            return ModelState.IsValid;
        }

        private bool ValidateRegistration(string userName, string 
        email, string password, string confirmPassword)
        {
            if (String.IsNullOrEmpty(userName))
            {
                ModelState.AddModelError("username", "You must specify 
                a username.");
            }
            if (String.IsNullOrEmpty(email))
            {
                ModelState.AddModelError("email", "You must specify an 
                email address.");
            }
            if (password == null || password.Length < 
            MembershipService.MinPasswordLength)
            {
                ModelState.AddModelError("password",
                    String.Format(CultureInfo.CurrentCulture,
                         "You must specify a password of {0} or more 
                         characters.",
                         MembershipService.MinPasswordLength));
            }
            if (!String.Equals(password, confirmPassword, 
            StringComparison.Ordinal))
            {
                ModelState.AddModelError("_FORM", "The new password 
                and confirmation password do not match.");
            }

            return ModelState.IsValid;
        }

        private static string ErrorCodeToString(MembershipCreateStatus 
        createStatus)
        {
            // See http://msdn.microsoft.com/en-us/library/system.web.
            security.membershipcreatestatus.aspx for
            // a full list of status codes.
            switch (createStatus)
            {
                case MembershipCreateStatus.DuplicateUserName:
                    return "Username already exists. Please enter a 
                    different user name.";

                case MembershipCreateStatus.DuplicateEmail:
                    return "A username for that e-mail address already 
                    exists. Please enter a different e-mail address.";

                case MembershipCreateStatus.InvalidPassword:
                    return "The password provided is invalid. Please 
                    enter a valid password value.";

                case MembershipCreateStatus.InvalidEmail:
                    return "The e-mail address provided is invalid. 
                    Please check the value and try again.";

                case MembershipCreateStatus.InvalidAnswer:
                    return "The password retrieval answer provided is 
                    invalid. Please check the value and try again.";

                case MembershipCreateStatus.InvalidQuestion:
                    return "The password retrieval question provided 
                    is invalid. Please check the value and try again.";

                case MembershipCreateStatus.InvalidUserName:
                    return "The user name provided is invalid. Please 
                    check the value and try again.";

                case MembershipCreateStatus.ProviderError:
                    return "The authentication provider returned an 
                    error. Please verify your entry and try again. If 
                    the problem persists, please contact your system 
                    administrator.";

                case MembershipCreateStatus.UserRejected:
                    return "The user creation request has been 
                    canceled. Please verify your entry and try again. 
                    If the problem persists, please contact your 
                    system administrator.";

                default:
                    return "An unknown error occurred. Please verify 
                    your entry and try again. If the problem persists, 
                    please contact your system administrator.";
            }
        }
        #endregion
    }

    // The FormsAuthentication type is sealed and contains static 
    members, so it is difficult to
    // unit test code that calls its members. The interface and helper 
    class below demonstrate
    // how to create an abstract wrapper around such a type in order 
    to make the AccountController
    // code unit testable.

    public interface IFormsAuthentication
    {
        void SignIn(string userName, bool createPersistentCookie);
        void SignOut();
    }

    public class FormsAuthenticationService : IFormsAuthentication
    {
        public void SignIn(string userName, bool 
        createPersistentCookie)
        {
            FormsAuthentication.SetAuthCookie(userName, 
            createPersistentCookie);
        }
        public void SignOut()
        {
            FormsAuthentication.SignOut();
        }
    }

    public interface IMembershipService
    {
        int MinPasswordLength { get; }

        bool ValidateUser(string userName, string password);
        MembershipCreateStatus CreateUser(string userName, string 
        password, string email);
        bool ChangePassword(string userName, string oldPassword, 
        string newPassword);
    }

    public class AccountMembershipService : IMembershipService
    {
        private MembershipProvider _provider;

        public AccountMembershipService()
            : this(null)
        {
        }

        public AccountMembershipService(MembershipProvider provider)
        {
            _provider = provider ?? Membership.Provider;
        }

        public int MinPasswordLength
        {
            get
            {
                return _provider.MinRequiredPasswordLength;
            }
        }

        public bool ValidateUser(string userName, string password)
        {
            return _provider.ValidateUser(userName, password);
        }

        public MembershipCreateStatus CreateUser(string userName, 
        string password, string email)
        {
            MembershipCreateStatus status;
            _provider.CreateUser(userName, password, email, null, null,
            true, null, out status);
            return status;
        }

        public bool ChangePassword(string userName, string oldPassword,
        string newPassword)
        {
            MembershipUser currentUser = _provider.GetUser(userName, 
            true /* userIsOnline */);
            return currentUser.ChangePassword(oldPassword, newPassword)
            ;
        }
    }
}

To add Captcha validation to the Register action Controller code, we perform a single line of setup in the Register action when the user GETs it, and execute the [CaptchaValidation] filter when the user POSTs it.

The filter attribute will automatically add the appropriate ModelState error if the Captcha code input doesn't match the code displayed to the user in the Captcha picture.

[back to the top of the page]

CaptchaHelper.cs

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

using BotDetect;
using BotDetect.Web;
using BotDetect.Web.UI;
using BotDetect.Web.UI.Mvc;

public class CaptchaHelper
{
    public static MvcCaptcha GetRegistrationCaptcha()
    {
        // create the control instance
        MvcCaptcha registrationCaptcha = new MvcCaptcha(
          "RegistrationCaptcha");
        registrationCaptcha.UserInputClientID = "captchaCode";

        // all Captcha properties are set in this event handler
        registrationCaptcha.InitializedCaptchaControl +=
            new EventHandler<InitializedCaptchaControlEventArgs>(
                RegistrationCaptcha_InitializedCaptchaControl);

        return registrationCaptcha;
    }

    // event handler used for Captcha control property randomization
    public static void RegistrationCaptcha_InitializedCaptchaControl(
      object sender, InitializedCaptchaControlEventArgs e)
    {
        if (e.CaptchaId != "RegistrationCaptcha")
        {
            return;
        }

        CaptchaControl registrationCaptcha = sender as CaptchaControl;

        // fixed Captcha settings 
        registrationCaptcha.ImageSize = new System.Drawing.Size(200, 
          50);
        registrationCaptcha.CodeLength = 4;

        // randomized Captcha settings
        registrationCaptcha.ImageStyle = CaptchaRandomization.
          GetRandomImageStyle();
        registrationCaptcha.SoundStyle = CaptchaRandomization.
          GetRandomSoundStyle();
    }
}

Captcha instance creation and property setting is encapsulated in this simple helper class. This separation allows application Views to stay simple regardless of the amount of Captcha customization chosen.

[back to the top of the page]

Global.asax.cs

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

namespace AspNetMvc10CaptchaSampleCSharp
{
    // Note: For instructions on enabling IIS6 or IIS7 classic mode, 
    // visit http://go.microsoft.com/?LinkId=9394801

    public class MvcApplication : System.Web.HttpApplication
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            // BotDetect requests must not be routed
            routes.IgnoreRoute("{*botdetect}", new { botdetect = @"(.*)
              BotDetectCaptcha\.ashx" });


            // Set the Register action as the sample project default, 
            // since it includes the Captcha control and we want to 
            show it
            routes.MapRoute(
               "Default",                                              
               // Route name
               "{controller}/{action}/{id}",                           
               // URL with parameters
               new { controller = "Account", action = "Register", id = 
               "" }  // Parameter defaults
            );
        }

        protected void Application_Start()
        {
            RegisterRoutes(RouteTable.Routes);
        }
    }
}

Since all BotDetect requests are handled by the BotDetect HttpHandler, ASP.NET Url Routing must be configured to ignore BotDetect requests, which can be achieved by a single line of code in Global.asax code-behind.

[back to the top of the page]

Web.config

<?xml version="1.0"?>
<configuration>
  <configSections>
    <sectionGroup name="system.web.extensions" type="System.Web.
    Configuration.SystemWebExtensionsSectionGroup, System.Web.
    Extensions, Version=3.5.0.0, Culture=neutral, 
    PublicKeyToken=31BF3856AD364E35">
      <sectionGroup name="scripting" type="System.Web.Configuration.
      ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, 
      Culture=neutral, PublicKeyToken=31BF3856AD364E35">
        <section name="scriptResourceHandler" type="System.Web.
        Configuration.ScriptingScriptResourceHandlerSection, System.
        Web.Extensions, Version=3.5.0.0, Culture=neutral, 
        PublicKeyToken=31BF3856AD364E35" requirePermission="false" 
        allowDefinition="MachineToApplication"/>
        <sectionGroup name="webServices" type="System.Web.
        Configuration.ScriptingWebServicesSectionGroup, System.Web.
        Extensions, Version=3.5.0.0, Culture=neutral, 
        PublicKeyToken=31BF3856AD364E35">
          <section name="jsonSerialization" type="System.Web.
          Configuration.ScriptingJsonSerializationSection, System.Web.
          Extensions, Version=3.5.0.0, Culture=neutral, 
          PublicKeyToken=31BF3856AD364E35" requirePermission="false" 
          allowDefinition="Everywhere"/>
          <section name="profileService" type="System.Web.
          Configuration.ScriptingProfileServiceSection, System.Web.
          Extensions, Version=3.5.0.0, Culture=neutral, 
          PublicKeyToken=31BF3856AD364E35" requirePermission="false" 
          allowDefinition="MachineToApplication"/>
          <section name="authenticationService" type="System.Web.
          Configuration.ScriptingAuthenticationServiceSection, System.
          Web.Extensions, Version=3.5.0.0, Culture=neutral, 
          PublicKeyToken=31BF3856AD364E35" requirePermission="false" 
          allowDefinition="MachineToApplication"/>
          <section name="roleService" type="System.Web.Configuration.
          ScriptingRoleServiceSection, System.Web.Extensions, 
          Version=3.5.0.0, Culture=neutral, 
          PublicKeyToken=31BF3856AD364E35" requirePermission="false" 
          allowDefinition="MachineToApplication"/>
        </sectionGroup>
      </sectionGroup>
    </sectionGroup>
  </configSections>
  <connectionStrings>
    <add name="ApplicationServices" connectionString="data source=.
    \SQLEXPRESS;Integrated Security=SSPI;
    AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true" 
    providerName="System.Data.SqlClient"/>
  </connectionStrings>
  <system.web>
    <compilation debug="true">
      <assemblies>
        <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, 
        PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Web.Extensions, Version=3.5.0.0, 
        Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Web.Abstractions, Version=3.5.0.0, 
        Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Web.Routing, Version=3.5.0.0, 
        Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Web.Mvc, Version=1.0.0.0, 
        Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, 
        Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Xml.Linq, Version=3.5.0.0, 
        Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Data.Linq, Version=3.5.0.0, 
        Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
      </assemblies>
    </compilation>
    <authentication mode="Forms">
      <forms loginUrl="~/Account/LogOn" timeout="2880" />
    </authentication>
    <membership>
      <providers>
        <clear/>
        <add name="AspNetSqlMembershipProvider" type="System.Web.
        Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, 
        Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" 
        connectionStringName="ApplicationServices" 
        enablePasswordRetrieval="false" enablePasswordReset="true" 
        requiresQuestionAndAnswer="false" requiresUniqueEmail="false" 
        passwordFormat="Hashed" maxInvalidPasswordAttempts="5" 
        minRequiredPasswordLength="6" 
        minRequiredNonalphanumericCharacters="0" 
        passwordAttemptWindow="10" 
        passwordStrengthRegularExpression="" applicationName="/" />
      </providers>
    </membership>
    <profile>
      <providers>
        <clear/>
        <add name="AspNetSqlProfileProvider" type="System.Web.Profile.
        SqlProfileProvider, System.Web, Version=2.0.0.0, 
        Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" 
        connectionStringName="ApplicationServices" applicationName="/" 
        />
      </providers>
    </profile>
    <roleManager enabled="false">
      <providers>
        <clear/>
        <add connectionStringName="ApplicationServices" 
        applicationName="/" name="AspNetSqlRoleProvider" type="System.
        Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, 
        Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
        <add applicationName="/" name="AspNetWindowsTokenRoleProvider" 
        type="System.Web.Security.WindowsTokenRoleProvider, System.Web,
        Version=2.0.0.0, Culture=neutral, 
        PublicKeyToken=b03f5f7f11d50a3a" />
      </providers>
    </roleManager>
    <!-- make sure Session State is enabled -->
    <pages enableSessionState="true">
      <controls>
        <add tagPrefix="asp" namespace="System.Web.UI" 
        assembly="System.Web.Extensions, Version=3.5.0.0, 
        Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add tagPrefix="asp" namespace="System.Web.UI.WebControls" 
        assembly="System.Web.Extensions, Version=3.5.0.0, 
        Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
      </controls>
      <namespaces>
        <add namespace="System.Web.Mvc"/>
        <add namespace="System.Web.Mvc.Ajax"/>
        <add namespace="System.Web.Mvc.Html"/>
        <add namespace="System.Web.Routing"/>
        <add namespace="System.Linq"/>
        <add namespace="System.Collections.Generic"/>
        <!-- add BotDetect namespaces for coding convenience -->
        <add namespace="BotDetect"/>
        <add namespace="BotDetect.Web"/>
        <add namespace="BotDetect.Web.UI"/>
        <add namespace="BotDetect.Web.UI.Mvc"/>
      </namespaces>
    </pages>
    <!-- configure Session State for BotDetect use -->
    <sessionState mode="InProc" cookieless="AutoDetect" timeout="20" 
      sessionIDManagerType="BotDetect.Web.CustomSessionIdManager, 
        BotDetect"/>
    <httpHandlers>
      <remove verb="*" path="*.asmx"/>
      <add verb="*" path="*.asmx" validate="false" type="System.Web.
      Script.Services.ScriptHandlerFactory, System.Web.Extensions, 
      Version=3.5.0.0, Culture=neutral, 
      PublicKeyToken=31BF3856AD364E35"/>
      <add verb="*" path="*_AppService.axd" validate="false" 
      type="System.Web.Script.Services.ScriptHandlerFactory, System.
      Web.Extensions, Version=3.5.0.0, Culture=neutral, 
      PublicKeyToken=31BF3856AD364E35"/>
      <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.
      Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.
      5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" 
      validate="false"/>
      <add verb="*" path="*.mvc" validate="false" type="System.Web.Mvc.
      MvcHttpHandler, System.Web.Mvc, Version=1.0.0.0, Culture=neutral,
      PublicKeyToken=31BF3856AD364E35"/>
      <!-- register HttpHandler used for BotDetect Captcha requests -->
      <add verb="GET" path="BotDetectCaptcha.ashx" 
	  type="BotDetect.Web.CaptchaHandler, BotDetect"/>
    </httpHandlers>
    <httpModules>
      <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, 
      System.Web.Extensions, Version=3.5.0.0, Culture=neutral, 
      PublicKeyToken=31BF3856AD364E35"/>
      <add name="UrlRoutingModule" type="System.Web.Routing.
      UrlRoutingModule, System.Web.Routing, Version=3.5.0.0, 
      Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
    </httpModules>
  </system.web>
  <system.codedom>
    <compilers>
      <compiler language="c#;cs;csharp" extension=".cs" 
      warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, 
      System, Version=2.0.0.0, Culture=neutral, 
      PublicKeyToken=b77a5c561934e089">
        <providerOption name="CompilerVersion" value="v3.5"/>
        <providerOption name="WarnAsError" value="false"/>
      </compiler>
      <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" 
      warningLevel="4" type="Microsoft.VisualBasic.VBCodeProvider, 
      System, Version=2.0.0.0, Culture=neutral, 
      PublicKeyToken=b77a5c561934e089">
        <providerOption name="CompilerVersion" value="v3.5"/>
        <providerOption name="OptionInfer" value="true"/>
        <providerOption name="WarnAsError" value="false"/>
      </compiler>
    </compilers>
  </system.codedom>
  <system.web.extensions/>
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false"/>
    <modules runAllManagedModulesForAllRequests="true">
      <remove name="ScriptModule"/>
      <remove name="UrlRoutingModule"/>
      <add name="ScriptModule" preCondition="managedHandler" 
      type="System.Web.Handlers.ScriptModule, System.Web.Extensions, 
      Version=3.5.0.0, Culture=neutral, 
      PublicKeyToken=31BF3856AD364E35"/>
      <add name="UrlRoutingModule" type="System.Web.Routing.
      UrlRoutingModule, System.Web.Routing, Version=3.5.0.0, 
      Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
    </modules>
    <handlers>
      <remove name="WebServiceHandlerFactory-Integrated"/>
      <remove name="ScriptHandlerFactory"/>
      <remove name="ScriptHandlerFactoryAppServices"/>
      <remove name="ScriptResource"/>
      <remove name="MvcHttpHandler"/>
      <remove name="UrlRoutingHandler"/>
      <add name="ScriptHandlerFactory" verb="*" path="*.asmx" 
      preCondition="integratedMode" type="System.Web.Script.Services.
      ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, 
      Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
      <add name="ScriptHandlerFactoryAppServices" verb="*" 
      path="*_AppService.axd" preCondition="integratedMode" 
      type="System.Web.Script.Services.ScriptHandlerFactory, System.
      Web.Extensions, Version=3.5.0.0, Culture=neutral, 
      PublicKeyToken=31BF3856AD364E35"/>
      <add name="ScriptResource" preCondition="integratedMode" 
      verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.
      Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.
      5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
      <add name="MvcHttpHandler" preCondition="integratedMode" 
      verb="*" path="*.mvc" type="System.Web.Mvc.MvcHttpHandler, 
      System.Web.Mvc, Version=1.0.0.0, Culture=neutral, 
      PublicKeyToken=31BF3856AD364E35"/>
      <add name="UrlRoutingHandler" preCondition="integratedMode" 
      verb="*" path="UrlRouting.axd" type="System.Web.
      HttpForbiddenHandler, System.Web, Version=2.0.0.0, 
      Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
      <!-- register HttpHandler used for BotDetect Captcha requests -->
      <remove name="BotDetectCaptchaHandler"/>
      <add name="BotDetectCaptchaHandler" 
        preCondition="integratedMode" verb="GET" 
		path="BotDetectCaptcha.ashx" 
		type="BotDetect.Web.CaptchaHandler, BotDetect"/>
    </handlers>
  </system.webServer>
</configuration>

The application's web.config file includes the standard BotDetect HttpHandler and Session state configuration elements.

[back to the top of the page]


Please Note

The information on this page is out of date and applies to a deprecated version of BotDetect™ CAPTCHA (v3.0).

An up-to-date equivalent page for the latest BotDetect Captcha release (v4) is BotDetect v4 Captcha documentation index.

General information about the major improvements in the current BotDetect release can be found at the What's New in BotDetect v4.0 page.

© Captcha, Inc. 2004-2023. All rights reserved.

BotDetect, BotDetect CAPTCHA, Lanap, Lanap CAPTCHA, Lanap BotDetect, Lanap BotDetect CAPTCHA, Lanapsoft, Lanapsoft CAPTCHA, Lanapsoft BotDetect, Lanapsoft BotDetect CAPTCHA, and Lanap Software are trademarks of Captcha, Inc. All other product, brand, and company names are mentioned for identification purposes only and are trademarks or registered trademarks of their respective owners.

Captcha, Inc. -- formerly: Lanapsoft, Inc. / Lanap, Inc.