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Creating a custom identity object that validates the user s credentials against the ASPNET MembershipProvider component follows the same basic process I ve discussed thus far The developer needs to create a custom principal and custom identity class as shown previously However, CSLA NET includes the MembershipIdentity class to simplify the process of validating the username and password against the ASPNET security store So instead of subclassing CslaIdentity, a developer can subclass MembershipIdentity because it already includes the code necessary to do the credential validation This means creating a subclass that looks like this: <Serializable()> _ Public Class CustomIdentity Inherits MembershipIdentity Protected Overrides Sub LoadCustomData() ' load roles and any custom properties here End Sub End Class The MembershipIdentity base class takes care of validating the username and password but doesn t attempt to load any roles for the user.

Throughout the text, the sample code has used the WriteLine method to display values. Each time, it used the simple substitution marker consisting of curly braces surrounding an integer. Many times, however, you will want to present the output of a text string in a format more appropriate than just a plain number. For example, you might want to display a value as currency or as a fixed-point value with a certain number of decimal places. You can do these things by using format strings. For example, the following code consists of two statements that print out the value 500. The first line prints out the number without any additional formatting. In the second line, the format string specifies that the number should be formatted as currency. Console.WriteLine("The value: {0}." , 500); Console.WriteLine("The value: {0:C}.", 500); Format as currency This code produces the following output: The value: 500. The value: $500.00. The difference between the two statements is that the format item includes additional information in the form of a format specifier. The syntax for a format specifier consists of three fields inside the set of curly braces: the index, the alignment specifier, and the format specifier. The syntax is shown in Figure 25-1. // Print out number // Format as currency

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It does call the LoadCustomData() method shown here so the developer can override that method to load the user s roles and any other user-related data By the time LoadCustomData() is invoked, the identity object is already loaded with the username, IsAuthenticated is True, and the identity object is essentially ready for use If the user s credentials are invalid, no exception is thrown Instead, an unauthenticated instance of MembershipIdentity is returned, with an IsAuthenticated value of False In this case, the LoadCustomData() method is not invoked because the identity doesn t represent a valid user You should now have an understanding of the difference between Windows and custom authentication And you should understand how the BusinessPrincipalBase and various identity base classes can be used to create custom principal and identity objects that provide user and role information to NET and CSLA NET for authorization.

hat can it be now When I first heard about scripting support in Java 6, I understood it to mean that the Mozilla Rhino JavaScript interpreter would be embedded in the platform. Using a JEditorPane, you would be able to not only show HTML in the component, but also have it execute the JavaScript on the web pages your users visit, allowing the component to be more like a full-fledged browser than just an HTML viewer for help text. But, that isn t where the scripting support in Mustang went. Instead, while Rhino is present, JSR 223 adds to Mustang a common interface to integrate any scripting language (like PHP or Ruby not just JavaScript), a framework for those scripting languages to access the Java platform, and a command-line scripting shell program, jrunscript. Before looking at the different elements offered by JSR 223, take a look at Table 9-1, which shows the relatively small size of the javax.script package, which provides the public APIs to the new scripting support library.

The web.config file also controls how the application uses the data portal. To have the website interact directly with the database, use the following (with your connection string changed to the connection string for your database): < xml version="1.0" encoding="utf-8" > <configuration> <appSettings> <add key="CslaAuthentication" value="Csla" /> </appSettings> <connectionStrings> <add name="PTracker" connectionString="your connection string" providerName="System.Data.SqlClient" /> <add name="Security" connectionString="your connection string" providerName="System.Data.SqlClient" /> </connectionStrings> Because LocalProxy is the default for the data portal, no actual data portal configuration is required, so the only settings in the configuration file are to control authentication and to provide the database connection strings.

In the rest of the chapter I discuss how CSLA NET supports authorization at the type and property levels..

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