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Then, as an added bonus, the Mobile Internationalization API includes a formatter utility that automatically formats currencies and dates according to the current locale The currency formatting is only a last step for beautification: no currency conversion is performed based on exchange rates, so your game needs to compute the correct value for the current currency before calling the format function; otherwise, there s a risk that you might mean to be selling a new feature for three euros, but on the user s handset it shows up as costing three Canadian dollars or something The API also offers methods that allow the MIDlet to choose the locale for the requested resources or formatting task in the case where you want to use a particular locale other than the platform s current locale..

Add a button to the form with an ID of m_CacheProvider and a Text property of Authorize with Cache Provider. Place the code shown in Listing 11-4 in the click event of the new button. Listing 11-4. Retrieving an Identity from the Cache protected void m_CacheProvider_Click(object sender, EventArgs e) { // Get a caching provider based on configuration ISecurityCacheProvider provider = SecurityCacheFactory.GetSecurityCacheProvider("Caching Store Provider"); // Get a token from session IToken securityToken = (IToken)Session["token"]; if (securityToken != null) { // Retrieve the identity for the supplied token IIdentity identity = provider.GetIdentity(securityToken); m_ResultLabel.Text = "Identity : " + identity.Name; } else { m_ResultLabel.Text = "Token was not available in session"; } } Run the application and click the Save an Identity to Cache button, then the Authorize with Cache Provider button. The first event will save the token to cache so that it can be retrieved on the click of the second button. The final result will be that the user s login will be displayed in the label at the top of the page.

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CHAPTER 8 JOHNNXT IS ALIVE!

Your application may require that authorization rules reside in a database table or have complex logic. In this case, the best approach is to create a custom authorization provider.

Now that you ve loaded the resources, the next step is to use them to create a beautiful user interface. This example covers the fundamental components of a professional finish: the opening sequence, the softkeys, and the menu of options.

parts move, so you won t have to worry about the low-level mechanical hassles. Whatever you write, keep in mind that you don t need to modify the slave program. Your work can be focused on the master program by following some directions. First of all, you must have the files shown in Table 8-1 in the same folder; you must include them in the master program s code using the #include directive. You can compile and run some subfiles as stand-alone, because they contain a main task that is compiled only when the file is not included in the JohnNXT master program. Table 8-1. The Subfiles That Must Always Be Included in the Master NXT Program

For a custom authorization provider, you must implement the Authorize method. This method takes two parameters: An IPrincipal-derived object that gives the user s information. A string that gives context for the user being authorized. This context is generally a role name.

For this example, we will use an XML file to store a cross-reference of user IDs and roles. This will also serve as a good example of using attributes within a custom provider, as the XML store file will be designated in the configuration. Listing 11-5 shows the format of the file. Listing 11-5. XML File of User IDs and Roles < xml version="1.0" encoding="utf-8" > <Users> <User Name="EntLib\jsmith" Role="Manager"/> <User Name="EntLib\jsmith" Role="Admin"/> <User Name="EntLib\mjones" Role="Sales"/> </Users> Perform the following steps to create a sample custom authorization provider: 1. Add a new class library to the SecurityDemo solution and name it SecurityDemoLibrary. Add the following references: Microsoft.Practices.EnterpriseLibrary.Security.dll Microsoft.Practices.EnterpriseLibrary.Security.Cache.CachingStore.dll Microsoft.Practices.EnterpriseLibrary.Common.dll Microsoft.Practices.EnterpriseLibrary.Caching.dll System.Configuration.dll 2. Add a new class to the SecurityDemoLibrary project and name it DemoAuthorizationProvider. 3. Add the following using statements: using using using using using using Microsoft.Practices.EnterpriseLibrary.Security; Microsoft.Practices.EnterpriseLibrary.Common.Configuration; Microsoft.Practices.EnterpriseLibrary.Security.Configuration; System.Xml; System.Collections.Specialized; System.Configuration;

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