c# datamatrix barcode Specifying a Membership Provider for your Website in Visual C#

Paint DataMatrix in Visual C# Specifying a Membership Provider for your Website

Specifying a Membership Provider for your Website
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ASP.NET membership is enabled for all new ASP .NET applications automatically. The default membership provider is the local instance of Microsoft SQL Server. This out-of-the-box behavior is catalogued within the <membership> element in the machine.config file. If you were to locate and open this file (located by default under C:\WINDOWS\Microsoft.NET\ Framework\v2.0.50215\CONFIG), you would find the following: <membership> <providers> <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="LocalSqlServer" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="true" applicationName="/" requiresUniqueEmail="false" passwordFormat="Hashed" maxInvalidPasswordAttempts="5" passwordAttemptWindow="10" passwordStrengthRegularExpression="" /> </providers> </membership>
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Notice that the <provider> element documents the known providers using the <add> subelement, each of which are qualified by numerous attributes. Given the intended purpose of XML, many of these attributes are thankfully self-describing. However, do note that the requiresQuestionAndAnswer attribute has been set to true. Keeping these default settings in your mind will demystify the process of adding new users. Once your web application has specified which membership provider it wishes to make use of (including the act of doing nothing and accepting the default settings), you are able to interact with the System.Web.Security.Membership type programmatically. In fact, there is one interesting behavior that might surprise you. If you author code that interacts with the Membership type and then run the web application, the ASP .NET runtime automatically creates a new mdf data file under the App_Data folder of your project if one does not currently exist (see Figure 5-11).
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Figure 5-11. The generated mdf file used by the Membership type If you examine the Solution Explorer perspective in Visual Studio 2005, you will also find that a data connection has been added to your project. Here you can view the database objects that are being manipulated in the background by the Membership type (see Figure 5-12).
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Figure 5-12. The generated data connection
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Adding New Members
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The first aspect of the Membership type we ll examine is the ability to add members to the data store maintained by the membership provider via Membership.CreateUser. This method has been overloaded a number of times; however, do note that each version returns an instance of the MembershipUser class type, which of course, represents the currently created user. (If the call to CreateUser fails, the return value is null.) public static class Membership { public static MembershipUser CreateUser (string username, string password); public static MembershipUser CreateUser (string username, string password, string email); public static MembershipUser CreateUser (string username, string password, string email, string passwordQuestion, string passwordAnswer, bool isApproved, out MembershipCreateStatus status); public static MembershipUser CreateUser (string username, string password, string email, string passwordQuestion, string passwordAnswer, bool isApproved, object providerUserKey, out MembershipCreateStatus status); } To illustrate the process of adding new users via code, assume you have authored a page named NewUser.aspx, which provides a series of TextBox widgets to account for the following points of data: Username Password E-mail Password retrieval question Answer to password retrieval question Why so many input fields you ask Recall that the machine.config file sets the requiresQuestionAndAnswer attribute to true. Furthermore, to provide this information, you must use of an overloaded version of CreateUser, which requires a string parameter representing the user s e-mail. This being said, ponder the following Button Click event handler:
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protected void btnSubmit_Click(object sender, EventArgs e) { // Initialize variable MembershipCreateStatus status = MembershipCreateStatus.UserRejected; try { Membership.CreateUser(txtUserName.Text, txtPassword.Text, txtEmail.Text, txtPassword.Text, txtAnswer.Text, true, out status); } catch (Exception ex) { lblValidationStatus.Text = ex.Message; } lblValidationStatus.Text = status.ToString(); } Once you scrape out the required data from the TextBox input fields, the call to CreateUser automatically updates the aspnet_Membership table within your project s mdf file. Again notice that you have authored no ADO.NET logic to do so. Also note that you pass in an output parameter of type MembershipCreateStatus. This enumeration describes the possible error conditions that may occur. Assuming all is well, this argument is set to MembershipCreateStatus.Success.
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