pdf417 c# source s COMPLETING THE FRAMEWORK in visual C#.net

Deploy PDF417 in visual C#.net s COMPLETING THE FRAMEWORK

Business objects provide an abstract representation of entities or concepts that are part of the business or problem domain.

One of the major tenets of service orientation is to separate the implementation from the interface, but in version 1.x of the .NET Framework, the only way to create a Web Service is to decorate a class (a piece of implementation code) with attributes. It would be nice to formalize this separation by defining the service contract with an interface, and then having any type come along and implement the interface. This is not only a cleaner model conceptually but it is also cleaner at the code level, since the attributes determining the structure of the contract are on the interface, and are not cluttering up the code for the implementing class. At the physical level, this allows you to literally separate the interface from the implementation, enabling you to move the contract definition (and the metadata of the interface in the compiled assembly) around independently from the implementation (the CIL in the implementing type s assembly). Let s consider the following interface, which you ll use as the starting point for your service contract. (This interface definition can be found in App_Code\IPhoneLib.cs of the Web06 project).

Listing 8-14. The SOAPRouter web.config File, Including Location of Referral Cache File <configuration> <configSections> <section name="microsoft.web.Services3" type="Microsoft.Web.Services3.Configuration.WebServicesConfiguration, Microsoft.Web.Services3, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> </configSections> <system.web> <webServices> <soapExtensionImporterTypes> <add type= "Microsoft.Web.Services3.Description.WseExtensionImporter, Microsoft.Web.Services3, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> </soapExtensionImporterTypes> </webServices> <httpHandlers> <add type="Microsoft.Web.Services3.Messaging.SoapHttpRouter, Microsoft.Web.Services3, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" verb="*" path="StockService.asmx" /> </httpHandlers> </system.web> <microsoft.web.Services3> <referral> <cache name="referralCache.config" /> </referral> </microsoft.web.Services3> </configuration> Note that referral cache files are cached in memory, just as web.config files are. The referral cache file will refresh in the cache whenever it gets updated.

Canvas.Left="370" Canvas.Top="270" Fill="Black"> <Rectangle.RenderTransform> <TransformGroup> <RotateTransform Angle="0"> </RotateTransform> </TransformGroup> </Rectangle.RenderTransform> </Rectangle> </Canvas> </UserControl> Here, as shown in the bolded fonts, the DoubleAnimationUsingKeyFrames class acts as a container for keyframes. LinearDoubleKeyFrame uses linear interpolation while it is active. Each keyframe specifies the value of the target property at the time specified in the KeyTime property. Since the KeyTime is 0:0:0 in the first keyframe, the target property is set to 240 when the animation begins. If a keyframe is not specified with a KeyTime of 0, the target property uses whatever its current value is, which might be the result of a previous animation or the property s local value. In the code-behind, we need to start the storyboard in the Loaded event of the user control, as follows: rectAnimation.Begin();

You can run the garbage collector manually by calling the static System.GC.Collect method. I recommend that you don t do this in your projects, relying instead on the garbage collector to decide when it needs to run. For the examples in this chapter, I want to be able to demonstrate the effect of garbage collection without having to wait for it to occur naturally, so I will be using this method. Listing 18-1 contains a simple demonstration of calling the Collect method. Listing 18-1. Explicitly Running the Garbage Collector using System; class Listing 01 { static void Main(string[] args) { // run the garbage collector GC.Collect(); // wait for input before exiting Console.WriteLine("Press enter to finish"); Console.ReadLine(); } } You might be tempted to run the garbage collector like this yourself. I really recommend that you don t, but if you believe you have no choice, you should take the time to understand how the collector works and what the impact of manual collection will be on your program.

That does it for the Activity Definition class. Just as with our simple activity earlier, a composite activity is made up of multiple classes. We covered all the standard ones back in the simple activity. We re going to touch on some of them again here, but only as deep as we need to in order to build our composite activity. If you re interested in looking at these in further detail, we took care of that earlier in the chapter. The first other class we re going to look at is the ActivityToolboxItem class. The class file is not listed in the Solution Explorer in Visual Studio so we re going to have to add it fresh. Add a new class file named LoggerActivityToolboxItem.cs. The first thing we need to add is some using statements, and then set up our class and a few constructors. Listing 5-22 shows the code for this. There s nothing overly special about any of this except for the serialization elements, but even that is pretty standard .NET stuff.

[Transactional(TransactionalTypes. TransactionScope)]

int divisionResult = calc.CalculateDivision(10, 0);

Console.WriteLine("Second task result: {0}", result); Console.WriteLine("Second task complete"); }); // start the first task firstTask.Start(); // wait for both tasks to complete Task.WaitAll(firstTask, secondTask); // wait for input before exiting Console.WriteLine("Press enter to finish"); Console.ReadLine(); } } The ContinueWith method is called on the first Task that is created in Listing 24-19. The parameter for the ContinueWith method is a lambda expression used in place of an Action. The parameter called antecedent is the original Task (which is called the antecedent), which allows you to check the status of the continuation Task. The result of the ContinueWith method is the newly created Task. You don t have to explicitly start the continuation Task; it will be started automatically when the antecedent has finished. Compiling and running Listing 24-19 produces the following results: First task starting First task result: 2305843005992468481 First task complete Second task starting Second task result: -2305843008139952128 Second task complete Press enter to finish