Shulou(Shulou.com)06/02 Report--

This article mainly introduces how to run the Silverlight application outside the browser, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, let the editor take you to know about it.

A remarkable feature of Silverlight3 is that its application can be run outside the browser. This means that an application running in a browser can be detached and start execution with a desktop and start menu bar icon, without the need for a network connection. This makes people feel like a normal desktop application rather than a browser application.

In order to achieve detached, users must have a clear choice for such applications: "the application cannot detached itself without user notification. Here is an example" Hello World ":

There is also some code:

Public partial class MainPage: UserControl {public MainPage () {InitializeComponent (); OnExecutionStateChanged (null, null); App.Current.ExecutionStateChanged + = OnExecutionStateChanged;} void OnExecutionStateChanged (object sender, EventArgs e) {txtStatus.Text = App.Current.ExecutionState.ToString ();} void OnClicked (object sender, RoutedEventArgs args) {App.Current.Detach ();}}

Then we run it in the browser and see a new right-click menu:

It allows the application to be isolated and installed locally. And you will notice that the menu item is gray. Similarly, we can add some code to the button event and try to separate the application. Void OnClicked (object sender, RoutedEventArgs args) {App.Current.Detach ();} but it doesn't start because the right-click menu is still grayed out. The reason is that there is no corresponding metadata support for this application. To provide metadata, we need to edit the appmanifest.xml file:

Mikes Application Blurbicons/16x16.pngicons/32x32.pngicons/48x48.pngicons/128x128.png

Note: the above icon files must be embedded in the XAP file with the content "Content" in VS. But I'm not sure you need all the files here, especially this "128x128".

In this way, the menu item will become "valid" when you right-click:

Next, the button we created earlier will trigger a dialog box that gives us two options: "install this application to run outside the browser to the desktop or start menu."

Note: that is a standard dialog box, and the dialog set by using my own avatar looks like this

But I'm not going to do that. I think it would be better to display a standard dialog box.

If you click on the dialog box, the application will try to detach itself. For me, what it does is make sure that the local XAP files are valid. Instead of trying to get other resources associated with it locally.

Note: the second copy of the application is now running in the form, and it is somewhat different from the browser form.

Now I have an icon for the app on my desktop:

It is also available in the start menu:

If I run this application from these two places, I will see a "non-browser" application:

When I run this original (version) application in my browser, it shows the same "Detached" status:

OK, now I'll modify the original application and set the background to "red":

Then run and publish the new XAP to the WEB server again. At first, it shows "Detached", then it switches to "DetachedUpdatesAvailable". This means that you can tell users that the application has been updated and prompt them to restart the application:

After that, when they run the application again, they will get the new version (the one I updated to the server):

If you want to delete the application, you can right-click the menu in your local "detached" copy or browser:

If I click on the menu above, the start menu and desktop icon will be removed so that the status of the application in the browser changes from "Detached" to "RunningOnline".

Although the App.Current.ExecutionState property returns "Detached", this has nothing to do with running the application in the browser or locally. This requires another flag to determine whether the application is launched from the browser or locally.

There is a flag in Application called "RunningOffline", which looks like it will return the true/false status. True means that the current application is launched independently locally, while False is launched in a browser.

As far as the actual running code of the current application is concerned, when it is offline (offline), there is a process (file located at: Program Files\ Microsoft Silverlight\ VERSION\ sllauncher.exe). It seems that it runs the corresponding program through the application name. Use Reflector to browse and find that the process seems to be running unmanaged, so I don't think I can get any internal information from it. But it is worth saying that one of the roles of the launcher is to keep the context of the application safe. That is, if the application is obtained from the domain foo.com, then the application must be run locally. Although it is launched from the foo.com (launched).

It is also important to note that this detached seems to be functionally dependent on Isolated Storage (isolated) storage. Because I found that when I apply "detached", I have to open Isolated Storage, which is really the case.

Thank you for reading this article carefully. I hope the article "how to run Silverlight applications outside the browser" shared by the editor will be helpful to you. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.