print barcode labels in vb.net Figure 16-8. Installing a Silverlight application locally in Visual C#

Generation PDF-417 2d barcode in Visual C# Figure 16-8. Installing a Silverlight application locally

Figure 16-8. Installing a Silverlight application locally
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When the user clicks to install the application locally, they are presented with the default Install Application dialog shown in Figure 16-9. The user has the option to create shortcuts on either the Start menu, Desktop, or both.
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Figure 16-9. Default Install Application dialog After the installation is complete, the application re-launches outside the browser. At this point, the user can reopen the application at any time via the shortcuts they chose during the installation.
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Customizing the Install Application Dialog
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As you have just seen, you can easily enable your application for out of browser support by simply checking one check box in your project properties. However, what if you would like to customize the installation experience for your application Luckily, Silverlight has made it very easy for developers to customize the title of their application, the shortcut names, and even the icons used in the installation experience. To customize your application s installation experience, in the project properties you will notice a button to the right of the check box for enabling out of browser support labeled Out-Of-Browser Settings. If you click that button, the Out-Of-Browser Settings dialog appears, as shown in Figure 16-10. In the following case, you have changed the title, the shortcut name, and you have provided a graphic for the 128 128 icon. Note that you have not provided graphics for the smaller icons, and as a result the 128 128 icon will simply be resized. This is fine for the purposes of this book, but in your applications you really should provide the smaller icons to obtain a crisper look.
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Figure 16-10. Out-of-Browser Settings Dialog With these settings changed, when you choose to install our application, you are presented with the updated dialog shown in Figure 16-11.
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Figure 16-11. Customized Install Application dialog
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Out of Browser API
As mentioned, in Silverlight applications running out of browser are running the exact same XAP as the application running in the browser. This is great for developers because you know that the user will have the same experience in both situations. However, what if you wanted to change that experience What if there were some elements to your application that you wanted to change the behavior in the event that users were running the application out of the browser In Silverlight, there are a number of API methods, properties, and events that you can work with to customize your application based on its state. One of these properties is the IsRunningOutOfBrowser property. This property returns true if application is running out of the browser and false if it is running within the browser. You can easily add code that looks at this property and executes accordingly. private void Button_Click(object sender, RoutedEventArgs e) { if (Application.Current.IsRunningOutOfBrowser) { OOBStatus.Text = "Application Running Out of Browser!"; } else { OOBStatus.Text = "Application Running In Browser"; } } By adding this code, you can then run the application within the browser (see Figure 16-12) and out of the browser (see Figure 16-13) to see that our application can behave differently depending on its state.
Figure 16-12. Application running within browser
CHAPTER 16 DEPLOYMENT
Figure 16-13. Application running out of the browser
Removing Installed Applications
You may be wondering how you can uninstall the Silverlight applications that you installed locally. In Silverlight 4 you can now uninstall your applications from Add/Remove programs within windows, as shown in Figure 16-14. That is all there is to it!
Figure 16-14. Removing a Silverlight application from Add/Remove programs
CHAPTER 16 DEPLOYMENT
In addition to using Add/Remove programs, you can also uninstall your application from the application itself. Uninstalling this way involves only one very simple step. Open the application, rightclick on it, and select Remove this Application, as shown in Figure 16-15. That is all there is to it!
Figure 16-15. Removing a Silverlight application from within the application
Elevated Trust Applications
The addition of out of browser support in Silverlight 3 was among the most popular of the new features in Silverlight. However, many developers asked for more access to client desktops, including device support and hard drive access. In Silverlight 4 developers can create applications that request elevated permissions, which will provide the client support developers were seeking. For more information on taking advantage of elevated permissions, see chapter 10, System Integration and Device Support. To enable elevated trust for your application, first enable out of browser for your application, as shown in Figure 16-16.
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