Here we enter the valid Username and Password which we assigned in our web. If we enter any invalid user then it will throw an exception. NET Forms Authentication. Next Recommended Reading. Windows 10 Vs Windows Visual Studio Vs Visual Studio Understanding Matplotlib With Examples. Understanding Numpy With Examples. Forms authentication cookie is nothing but the container for forms authentication ticket.
The ticket is passed as the value of the forms authentication cookie with each request and is used by forms authentication, on the server, to identify an authenticated user. However, if we choose to use cookieless forms authentication, the ticket will be passed in the URL in an encrypted format. Cookieless forms authentication is used because sometimes the client browsers block cookies.
This feature is introduced in the Microsoft. NET Framework 2. The forms authentication ticket is used to tell the ASP. NET application who you are. Thus, ticket is building block of Forms Authentication's security. NET 2. The decryption attribute lets you specify the encryption algorithm to use.
NET 1. Tampering with the ticket value is determined by a failure to decrypt the ticket on the server. As a result, the user will be redirected to the logon page. You must do this because you cannot guarantee which server will handle successive requests. NET for use in Forms Authentication. In case of non-persistent cookie, if the ticket is expired, cookie will also expire, and the user will be redirected to the logon page.
On the other side, if the ticket is marked as persistent, where the cookie is stored on the client box, browsers can use the same authentication cookie to log on to the Web site any time. However, we can use the FormsAuthentication. SignOut method to delete persistent or non-persistent cookies explicitly. For more information about the FormsAuthentication. Sliding expiration works exactly the same way! NET2 has removed all the mundane tasks that you used to perform to authenticate a user through form.
It provides a number of Login controls that can reduce your effort to great extent. This article discusses the forms authentication using ASP. Net 2. Introduction: Although the forms authentication process in ASP. NET2 can be done as a standalone authentication or with the Membership and Roles Providers which have their own database schema.
In a highly simplified scenario, you need not even use a database and validate users against the set of credentials that can be stored in the Forms element itself, as shown in the code given below: The form authentication system generates an authentication ticket when the users logs in.
The system then uses the authentication ticket to track the users throughout their login session as they browse through the website. The Form authentication system uses the user store that contains user accounts and password to allow visitors to log into the site. The form authentication in ASP. The Windows token is issued on the basis of IIS metabase settings configured on the hosting server.
Figure 5 : Add a New Default. Instead, you need to add an item of type "Web Content Form. The new Default. Our master page includes a section for a menu or some other navigation interface. We will create such an interface in a future tutorial. With the ASP. NET website created, our next task is to enable forms authentication.
This attribute can have one of the following four values:. By default, ASP. NET applications use Windows authentication. If your project does not yet contain a Web. After this change, your Web.
Since Web. Make sure that you set the mode attribute to Forms, with a capital "F". If you use a different casing, such as "forms", you'll receive a configuration error when visiting the site through a browser. For now, let's just use the default forms authentication settings. In order to support forms authentication our website needs a login page. As discussed in the "Understanding the Forms Authentication Workflow" section, the FormsAuthenticationModule will automatically redirect the user to the login page if they attempt to access a page that they are not authorized to view.
There are also ASP. NET Web controls that will display a link to the login page to anonymous users. This begs the question, "What is the URL of the login page? By default, the forms authentication system expects the login page to be named Login. If you want to use a different login page URL, you can do so by specifying it in Web.
We will see how to do this in the subsequent tutorial. Let's get started with the first task. Add a new ASP. NET page to the site's root directory named Login. The typical login page interface consists of two textboxes — one for the user's name, one for their password — and a button to submit the form.
Websites oftentimes include a "Remember me" checkbox that, if checked, persists the resulting authentication ticket across browser restarts. Add two TextBoxes to Login. Also set Password's TextMode property to Password. Please try again. At this point your screen should look similar to the screen shot in Figure 9, and your page's declarative syntax should like the following:. Finally, create an event handler for the LoginButton's Click event.
From the Designer, simply double-click the Button control to create this event handler. We now need to implement task 2 in the Button's Click event handler — determining whether the supplied credentials are valid. In order to do this there needs to be a user store that holds all of the users' credentials so that we can determine if the supplied credentials match up with any known credentials. Prior to ASP. Most developers would implement the user store in a database, creating a table named Users with columns like UserName, Password, Email, LastLoginDate, and so forth.
This table, then, would have one record per user account. Verifying a user's supplied credentials would involve querying the database for a matching username and then ensuring that the password in the database corresponded to the supplied password. With ASP. When using the SqlMembershipProvider we need to implement a specific database schema that includes the tables, views, and stored procedures expected by the provider. With the Membership provider in place, validating the user's credentials is as simple as calling the Membership class 's ValidateUser username , password method , which returns a Boolean value indicating whether the validity of the username and password combination.
Seeing as we have not yet implemented the SqlMembershipProvider's user store, we cannot use the Membership class's ValidateUser method at this time. Rather than take the time to build our own custom Users database table which would be obsolete once we implemented the SqlMembershipProvider , let's instead hard-code the valid credentials within the login page itself.
In the LoginButton's Click event handler, add the following code:. As you can see, there are three valid user accounts — Scott, Jisun, and Sam — and all three have the same password "password". The code loops through the users and passwords arrays looking for a valid username and password match. If both the username and password are valid, we need to login the user and then redirect them to the appropriate page.
If the credentials are invalid, then we display the InvalidCredentialsMessage Label. When a user enters valid credentials, I mentioned that they are then redirected to the "appropriate page. Recall that when a user visits a page they are not authorized to view, the FormsAuthenticationModule automatically redirects them to the login page.
That is, if a user attempted to visit ProtectedPage. Upon successfully logging in, the user should be redirected back to ProtectedPage. Alternatively, users may visit the login page on their own volition. In that case, after logging in the user they should be sent to the root folder's Default. Assuming that the supplied credentials are valid, we need to create a forms authentication ticket, thereby logging in the user to the site. The FormsAuthentication class in the System. Security namespace provides assorted methods for logging in and logging out users via the forms authentication system.
While there are several methods in the FormsAuthentication class, the three we are interested in at this juncture are:. GetAuthCookie is handy when you need to modify the authentication ticket before writing the cookie out to the Cookies collection. SetAuthCookie is useful if you want to create the forms authentication ticket and add it to the Cookies collection, but do not want to redirect the user to the appropriate page.
Perhaps you want to keep them on the login page or send them to some alternate page. Since we want to log in the user and redirect them to the appropriate page, let's use RedirectFromLoginPage. When creating the forms authentication ticket we use the UserName TextBox's Text property for the forms authentication ticket username parameter, and the checked state of the RememberMe CheckBox for the persistCookie parameter.
To test the login page, visit it in a browser. Start by entering invalid credentials, such as a username of "Nope" and a password of "wrong".
Upon clicking the Login button a postback will occur and the InvalidCredentialsMessage Label will be displayed. Next, enter valid credentials and click the Login button.
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