.net barcode generator Figure 11-17. First page of a paged text display in VB.NET

Encoding qr barcode in VB.NET Figure 11-17. First page of a paged text display

Partial classes are classes that can be split over multiple definitions. This is usually done to deal with large amounts of code. In Silverlight, however, this is common in UserControls because the XAML portion and the C# (or VB) code-behind files are both partial classes that are merged by the complier at runtime. As a matter of fact, when you create a new Silverlight project, you will see that a default MainPage.xaml with a code-behind page of MainPage.xaml.cs is created for you. These two files are in fact partial classes, as you can see here: namespace SLApplication { public partial class MainPage : UserControl { public MainPage() { // Required to initialize variables InitializeComponent(); } } } InitializeComponent(); is the method that actually instructs the compiler to merge the two partial class classes definitions into one class.

Value assigned 11 - Explicitly set 12 - One more than the previous 13 - One more than the previous 14 - One more than the previous 4 - Explicitly set 5 - One more than the previous 14 - Ace is defined above

This code produces the following output: Inner Catch: Value cannot be null. Outer Catch: Handling an Exception.

In the left nav bar, under the LIBRARY heading, click the type of content (Music, Movies, TV Shows, Podcasts, iTunes U, etc.) you d like to transfer. In the main window, you ll see your library of content. It s usually easiest to select List View from the top of iTunes, as shown in Figure 3 23. This allows you to see all the content in a list and easily select a single item or group of items.

tell it), your applications, or the versions you are running. Relying on checklists alone is also futile; checklists are useful as a general hardening guide but not as a guide for complete security of data. To secure the data completely, you must understand the data; you must understand how the data flows into the database and how the data flows out of the database. You must also understand who has access to the data and where and how. Only with complete information can you form a security policy that will enable you to secure the data. This chapter started with an abnormally naive approach of thinking that the data is simply within a single table; this is wrong. Extending the problem to also include security means that the security is not just the privileges on that single table but it is the privileges of every object that also accesses that table. The problem does not stop there because there are many other ways to get at the same data, and that is why it is important to understand how the data flows into and out of the database. With this knowledge, you will be able to think in a devious manner, in the same manner as someone who wants to steal your data. Learn to think like a hacker. If you can understand the true privilege model and access model to the data within the database, you can secure it. Therefore, you can secure the data and, with it, Oracle. Combine the processes described in this chapter with the knowledge from the preceding chapter around securing users, and then your database will be much harder to break into. If no one who should not be able to access the data can even attempt to enter the database, and you have hardened the privileges on the data to the level of an authorized user, you will be really secure. Good luck!

Use a for loop, a foreach loop or work directly with the IEnumerator<T> interface. Use the static System.Array.Sort method. Use the static System.Array.ForEach method.

Summary

Traditionally, an ASP .NET developer s concern regarding the application architecture ends at the database. Sure, you may need to decide between using stored procedures or queries, or you may need to work with the data administrator to define the data schemas, but the brunt of the design and the implementation is normally passed to those who live and breathe tables, views, stored procedures, triggers, and Transact-SQL (T-SQL). With the introduction of SQL Server 2005, however, come several new features that blur the sharp line between application and database concerns. Most notably, SQL Server 2005 provides a feature called Common Language Runtime (CLR) integration, which allows managed code to execute within the SQL Server 2005 process and interact directly with the data. Other new features of particular interest to application developers include Service Broker and XML as a native type. Although a detailed drill down of each of the features is beyond the scope of this book, this section provides an overview of each with the information you need to correctly position and leverage them in your architecture.

This code produces the following output: finally clause in B() finally clause in A() catch clause in Main() finally clause in Main() After try statement in Main. -- Keep running.

Figure 33-2. The WPF split view WPF uses XML to describe a user interface. The XML dialect is called XAML (which is pronounced zammel). When we drag a control onto the design surface of our Windows Forms project, the designer adds new C# statements to our code file. When you drag a component onto the WPF surface, XML elements are added to our XAML document. Here is the default XAML document that was created as part of our new project: <Window x:Class="SwimCalculator.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"> <Grid> </Grid> </Window> If I drag a Button control onto the design surface, the XAML is updated to reflect the change: <Window x:Class="SwimCalculator.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"