How to use the PrincipalPermission Class to check authorization in ASP.NET in C#
.NET provides alternative way to enforce role and user rules. Instead of approach described in the article How to use IsInRole method to check authorization in ASP.NET in C#, you can use the PrincipalPermission class from the System.Security.Permissions namespace. You should follow the next steps:
1. Create a PrincipalPermission object that represents the …
How to use IsInRole method to check authorization in ASP.NET in C#
You can use IsInRole() method to evaluate whether a user is a member of a group. This method accepts the role name as a string name and returns true if the user is a member of that role.
You can use the next code to check if the current user is a member of the Supplier role:
if …
How to perform the Impersonation as a step of Programmatic Impersonation in C#
Configured impersonation, described in the article How to use Configured Impersonation in ASP.NET, allows you to impersonate a user for the entire duration of a request. By using programmatic impersonation (based on the WindowsIdentity.Impersonate() method) , you have more control, such as the ability to impersonate a user for only part of the page request. This …
How to access IdentityReference and Role information in Windows Authentication in C#
The .NET Framework distributes with a set of IdentityReference classes. An IdentityReference is a reference to a valid Windows identity (which is computer, user accounts or Windows group) that is expressed through a SID. Every time when system administrator creates a user, a group, or he/she set up a new machine with Windows, he/she gets a …
How to use WindowsIdentity class in Windows Authentication in C#
When your project is based on Windows authentication you can access some additional information about the currently authenticated user by casting the general identity object to a WindowsIdentity object. The next table lists additional members provided by WindowsIdentity:
Member
Description
IsAnonymous
Returns true if the user is anonymous (has not been authenticated).
IsGuest
Returns true if the user is using …
How to use WindowsPrincipal class in Windows Authentication in C#
You can use WindowsPrincipal class to access WindowsIdentity object through the Identity property. You need this when your project is based on Windows authentication and you use in your code User property which returns an IPrincipal object as instance of the WindowsPrincipal class. The class implements four overloads of IsInRole() that all check whether the user is …
When your Web project is based on Windows authentication it does not require a login page. When end user requests a Web page that requires authentication, his browser transmits the credential to IIS and your application than retrieves information from the User property of the web page. You can use the next subroutine to display the …
The Membership class provides a method for validating a membership user. If a user has entered his user name and password in a login mask, you can use the ValidateUser() method for programmatically validating the information entered by the user, as follows:
protected void LoginAction_Click(object sender, EventArgs e)
{
if (Membership.ValidateUser(UsernameText.Text, PasswordText.Text))
{
FormsAuthentication.RedirectFromLoginPage(UsernameText.Text, …
How to use ASP.NET Membership class to create and delete users in the store in C#
If you want to create users to your web site, you should follow the next steps:
1. Create a new page which contains the necessary text boxes for entering the required information.
2. Add a button
3. Handle …
How to use ASP.NET Membership class to update users in the store in C#
If you want to update a user in the membership store, you have to:
1. Retrieve the user from the store based on the approach described in the article: How to use ASP.NET Membership class to retrieve users from the store in C#.