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The MembershipUser Type
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When a call to CreateUser completes successfully, you are returned an instance of the MembershipUser type: MembershipUser newUser = Membership.CreateUser( ); As you would guess, this type represents a single user stored in the membership system. Using this type, you are able to call various user-specific operations, including obtaining the same pieces of data that were submitted at the time of creation using properties such as Email, PasswordQuestion, UserName, and so on. As well, MembershipUser provides additional points of interest, some (but not all) of which are documented in Table 5-7. Table 5-7. Select Members of MembershipUser MembershipUser Member
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CreationTime IsOnLine ChangePassword
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Returns a DateTime representing when this user was added to the membership data store. Returns a Boolean that represents if the current user is in session. Enables you to change the stored password for the current user.
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CHAPTER 5 .NET 2.0 SECURITY
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MembershipUser Member
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ChangePasswordQuestionAndAnswer GetPassword LastActivityDate LastLoginDate LastPasswordChangeDate
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Enables you to change the stored password question/answer for the current user. Retrieves the currently stored password for the current user. Several methods of MembershipUser return DateTime objects that represent various timestamps regarding their activity.
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Updating a User s Properties
Now assume you ve designed a specific segment of your Web UI to allow the user to change his stored credentials (password, password question/answer and so on). The first task is to obtain a MembershipUser object that maps to the currently logged-on user via a call to Membership.GetUser. Next, simply feed in the new data using any of the members of MembershipUser and call Membership.UpdateUser to complete the update: protected void btnChangeUserPasswordQandA_Click(object sender, EventArgs e) { // Get currently logged on user. MembershipUser currUser = Membership.GetUser(); // Change select aspects of MembershipUser object. currUser.ChangePasswordQuestionAndAnswer(txtPassword.Text, txtQuestion.Text, txtAnswer.Text); // Update membership. Membership.UpdateUser(currUser); }
Deleting a User
Removing a user from the underlying membership data store is as simple as creating or updating one. Simply obtain the stored username for the current user and call Membership.DeleteUser: protected void btnDeleteCurrentUser(object sender, EventArgs e) { // Get currently logged on user. MembershipUser currUser = Membership.GetUser(); // Delete based on username. Membership.DeleteUser(currUser.UserName); } At this point you have seen how the Membership and MembershipUser types can be used to automatically maintain the underlying data store used by a specific membership provider.
CHAPTER 5 .NET 2.0 SECURITY
Remember that the core purpose of these types is to encapsulate the required SQL goo on your behalf. As you might agree, this is a large improvement from ASP .NET 1.1; however, at this point the examples still demand that you author the necessary Web UI to add users, update user accounts, validate credentials, and whatnot. Using ASP .NET 2.0, you can rectify this issue as well.
Working with the Security Server Controls
To alleviate the pain of building repeatable and redundant security-related Web UIs, ASP.NET 2.0 provides the server controls we describe in Table 5-8. Table 5-8. The .NET 2.0 Security-centric Server Controls
Security-centric Server Control
Login LoginStatus LoginName PasswordRecovery
Meaning in Life
Provides a standard UI to enable the user to supply credentials. Toggles between two messages based on the login status of the current user. Provides simplified access to the name of the currently logged-on user. Provides a Web-based Wizard that allows the user to obtain her password based on a stored password question and answer. Provides a consistent UI that allows the end user to change her stored password. Provides a Wizard-based model to add new users to your site.
ChangePassword CreateUserWizard
As you read over the next several pages, do be very aware that each of these new securitycentric controls leverages the membership architecture you previously examined. Given this fact, you may find that by using these controls, you are able to provide full and complete authentication services without authoring a single line of code.
Note Like any ASP.NET Web Control, the new security controls define numerous properties, methods, and
events. Given that full details of each member can be found within the .NET Framework 2.0 SDK Documentation, we ll stay focused on the core behavior of each type.
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