c# itextsharp create barcode ChAPTER 12 Working with Data Source Controls and Data-Bound Controls in C#

Assign Quick Response Code in C# ChAPTER 12 Working with Data Source Controls and Data-Bound Controls

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The Shared attribute is new to ASP.NET 2.0. If it is set to true, the cached output of user controls across different ASP.NET pages is shared among all pages, thus conserving processing power and memory. In ASP.NET 1.x (and, by default, in ASP.NET 2.0) each page using a given user control maintains a distinct copy of the user control.

Nokia.use('template-default', init);

public static void Main() { String name = null; // Since name is null, the delegate runs and initializes name LazyInitializer.EnsureInitialized(ref name, () => "Jeffrey"); Console.WriteLine(name); // Displays "Jeffrey" // Since name is not null, the delegate does not run; name doesn t change LazyInitializer.EnsureInitialized(ref name, () => "Richter"); Console.WriteLine(name); // Also displays "Jeffrey" }

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To non-C++ programmers, this code is particularly hard to read. The complicated expression in the while condition is an example of a coding practice you should avoid unless you have a good reason to use it. This routine takes about 350 percent longer than the longer version above, executing in 2.4 seconds rather than 0.66 seconds. But it s faster than the first approach, and adapts easily to 32-bit, 64-bit, and other environments. This example highlights the value of not stopping after one successful optimization. The first optimization earned a respectable 30-40 percent savings but had nowhere near the impact of the second optimization or third optimizations.

In the New Project dialog box, select Visual C# as the project type, and in the list under that type, choose Silverlight. Select Silverlight Application as the template and name the project Ch2_HelloWorld, as shown in Figure 2-18. Then click OK.