IntelliTrace can be used to collect and analyze the data in production. IntelliTrace speeds debugging by showing history of what happened in your application while you run. This reduces how often you restart the application when you want look at past events. IntelliTrace automatically collects information about events when you start debugging. Some examples of events exceptions, break points and dot net events. You can also use IntelliTrace for calls information.

Configuring IntelliTrace in VS 2012

To turn on IntelliTrace Collection, Open Visual Studio Tools Menu then click options then tick mark the Enable IntelliTrace check box



You can select IntelliTrace Events and choose the events and event categories that you want to collect. You can examine the values for variables , inputs and outputs for functions and procedures. Selecting an event takes you to the code where that event happened.



You can then use the standard debugging windows to review the application state and examine the collected value. You can collect and save this information to a file.



This file contains the information about exceptions, web requests, test steps and other appropriate data. This file helps you to debug your application after crash and identify how to reproduce bugs.

Collecting the information from Applications in Production

You can use stand-alone collector to get IntelliTrace information about applications that are in production. You can use Power-Shell commands to collect the data and delete the collector when you are done. You can download this tool from here



IntelliTrace collects the information with-out interrupting applications operations data. You can now open the file in Visual Studio 2012 , if the application is web then you can select the specific web request and see the details as shown below



After selecting a particular web request then you will get all the associated events to that request , You can select a specific event and choose start debugging



Visual Studio takes you to the code where the event happened , Now you can use standard VS debugging experience with IntelliTrace to examine the collected values. You can definitely save debugging time using IntelliTrace by using applications history and state without restarting. It provides more debugging information and capabilities to find and fix bugs faster.

API reference for extensibility can found here

Introduction

This article describes how to create a permanent user login session in ASP.NET. The sample code includes an ASP.NET MVC4 project to control the user registration and login process. But you can use this technique in any type of ASP.NET project.

Forms Authentication

Before getting into the depth of this article, you must be familiar with forms authentication in ASP.NET. The configuration of form authentication resides in web.config file which has the following configuration-file fragment with the assigned values.

<authentication mode="Forms">
      <forms loginUrl="~/Account/LogOn"
             protection="All"
             timeout="1"
             name=".USERLOGINCONTROLAUTH"
             path="/"
             requireSSL="false"
             slidingExpiration="true"
             defaultUrl="~/Home/Index"
             cookieless="UseDeviceProfile"
             enableCrossAppRedirects="false"/></authentication>

The default values are described below:

- loginUrl points to your application's custom logon page. You should place the logon page in a folder that requires Secure Sockets Layer (SSL). This helps ensure the integrity of the credentials when they are passed from the browser to the Web server.

- protection is set to All to specify privacy and integrity for the forms authentication ticket. This causes the authentication ticket to be encrypted using the algorithm specified on the machineKey element, and to be signed using the hashing algorithm that is also specified on the machineKey element.

- timeout is used to specify a limited lifetime for the forms authentication session. The default value is 30 minutes. If a persistent forms authentication cookie is issued, the timeout attribute is also used to set the lifetime of the persistent cookie.

- name and path are set to the values defined in the application's configuration file.

- requireSSL is set to false. This configuration means that authentication cookies can be transmitted over channels that are not SSL-encrypted. If you are concerned about session hijacking, you should consider setting requireSSL to true.

- slidingExpiration is set to true to enforce a sliding session lifetime. This means that the session timeout is periodically reset as long as a user stays active on the site.

- defaultUrl is set to the Default.aspx page for the application.

- cookieless is set to UseDeviceProfile to specify that the application use cookies for all browsers that support cookies. If a browser that does not support cookies accesses the site, then forms authentication packages the authentication ticket on the URL.

- enableCrossAppRedirects is set to false to indicate that forms authentication does not support automatic processing of tickets that are passed between applications on the query string or as part of a form POST.

FormsAuthentication.SetAuthCookie Method

This method creates an authentication ticket for the supplied user name and adds it to the cookies collection of the response, or to the URL if you are using cookieless authentication. The first overload of this function has two parameters:

- userName: The name of the authenticated user

- createPersisntentCookie: True to create a persistent cookie (one that is saved across browser sessions); otherwise, false.

This method add a cookie or persistent cookie to the browser with an expire time set in "timeOut" parameter with the name and path set in "name" and "path" parameter. The user will be automatically logged out once the cookie is expired. So the user login session depends on the expire of forms authentication ticket saved in browser cookie. Here, I will create a permanent user login session using this technique.

Cookie Helper

The functionality of this class is to add a form authentication ticket to the browser cookie collection with a life time expiry.

public sealed class CookieHelper
{
    private HttpRequestBase _request;
    private HttpResponseBase _response;

    public CookieHelper(HttpRequestBase request,
      HttpResponseBase response)
      {
            _request = request;
            _response = response;
      }

    //[DebuggerStepThrough()]
    public void SetLoginCookie(string userName,string password,bool isPermanentCookie)
    {
        if (_response != null)
        {
            if (isPermanentCookie)
            {
                FormsAuthenticationTicket userAuthTicket =
                  new FormsAuthenticationTicket(1, userName, DateTime.Now,
                  DateTime.MaxValue, true, password, FormsAuthentication.FormsCookiePath);
                string encUserAuthTicket = FormsAuthentication.Encrypt(userAuthTicket);
                HttpCookie userAuthCookie = new HttpCookie
                  (FormsAuthentication.FormsCookieName, encUserAuthTicket);
                if (userAuthTicket.IsPersistent) userAuthCookie.Expires =
                                    userAuthTicket.Expiration;
                userAuthCookie.Path = FormsAuthentication.FormsCookiePath;
                _response.Cookies.Add(userAuthCookie);
            }
            else
            {
                FormsAuthentication.SetAuthCookie(userName, isPermanentCookie);
            }
        }
    }
}

This function is used in login page or control on the click of login button. In the attached sample project, the following function is written in AccountController class. This function validates the login of the user and then add a permanent form authentication ticket to the browser.

private bool Login(string userName, string password,bool rememberMe)
{
    if (Membership.ValidateUser(userName, password))
    {
        CookieHelper newCookieHelper =
            new CookieHelper(HttpContext.Request,HttpContext.Response);
        newCookieHelper.SetLoginCookie(userName, password, rememberMe);
        return true;
    }
    else
    {
        return false;
    }
}

As a web developer one common request is to make sure that the interfaces we build out for users look the best that they can and also provide users with the best experience both via the keyboard and mouse. As part of this we will often have areas of conflict. This post is going to cover one common scenario that will impact users that might be using DotNetNuke common styles or working to create their own custom button styles. With ASP.NET it is common for people to use "LinkButton" controls to trigger actions rather than your standard "Button" controls as they are easier to style.

There is nothing wrong with this until you try to perform actions against the 'LinkButton' and it doesn't function as you would expect. For this purposes of this post lets say we are building a custom login form that has two textboxes; txtUsername and txtPassword and a single LinkButton btnLogin. We want to ensure that if the user presses enter on either of the textboxes that they are logged in.

Using standard jQuery we would try something like this:

   1:  $("#<%=txtPassword.ClientID %>").keydown(function(event) {
   2:      if (event.keyCode == 13) {
   3:          $("#<%=btnLogin.ClientID %>").click();
   4:      }
   5:  });

This is a pretty standard jQuery method to listen for the enter key and simply "click" the button. However, if you are using a LinkButton this code will not work. The reason for this is that a LinkButton is rendered to the browser as an Anchor tag with a href property that contains a javascript action to trigger the postback. Click does nothing on the button as there is nothing for it to complete.

To get around this you need to actually look into the generated anchor tag, grab the href value and evaluate it. Similar to the following:

   1:  $("#<%=txtPassword.ClientID %>").keydown(function(event) {
   2:      if (event.keyCode == 13) {
   3:          eval($("#<%=btnLogin.ClientID %>").attr('href'));
   4:      }
   5:  });

Using this structure the postback will be triggered and the user will be logged in as you expect them. This works great for any linkbutton, including those styled with the default DotNetNuke 6.x form pattern styles.

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