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The Unit Test of Silverlight Applications with Asynchronous Service Callbacks

, 18 Feb 2011
This article presents an example on unit testing of Silverlight applications with asynchronous service callbacks.
SilverlightUnitTestExample.zip
SilverlightUnitTestExample
SilverlightApplication
SilverlightApplicationUnitTest
Bin
Debug
Properties
SilverlightApplicationUnitTest.csproj.user
Bin
Debug
Models
Properties
Service References
StudentService
configuration.svcinfo
configuration91.svcinfo
Reference.svcmap
SilverlightApplication.StudentService.Student.datasource
StudentService.disco
StudentService.wsdl
ServiceReferences.ClientConfig
SilverlightApplication.csproj.user
Utilities
ViewModels
SilverlightHostWebApplication
bin
ClientBin
Properties
Scripts
SilverlightHostWebApplication.csproj.user
StudentService.svc
Styles
SilverlightUnitTestExample.suo
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace SilverlightApplication
{
    public partial class App : Application
    {

        public App()
        {
            this.Startup += this.Application_Startup;
            this.Exit += this.Application_Exit;
            this.UnhandledException += this.Application_UnhandledException;

            InitializeComponent();
        }

        private void Application_Startup(object sender, StartupEventArgs e)
        {
            this.RootVisual = new MainPage();
        }

        private void Application_Exit(object sender, EventArgs e)
        {

        }

        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            // If the app is running outside of the debugger then report the exception using
            // the browser's exception mechanism. On IE this will display it a yellow alert 
            // icon in the status bar and Firefox will display a script error.
            if (!System.Diagnostics.Debugger.IsAttached)
            {

                // NOTE: This will allow the application to continue running after an exception has been thrown
                // but not handled. 
                // For production applications this error handling should be replaced with something that will 
                // report the error to the website and stop the application.
                e.Handled = true;
                Deployment.Current.Dispatcher.BeginInvoke(delegate { ReportErrorToDOM(e); });
            }
        }

        private void ReportErrorToDOM(ApplicationUnhandledExceptionEventArgs e)
        {
            try
            {
                string errorMsg = e.ExceptionObject.Message + e.ExceptionObject.StackTrace;
                errorMsg = errorMsg.Replace('"', '\'').Replace("\r\n", @"\n");

                System.Windows.Browser.HtmlPage.Window.Eval("throw new Error(\"Unhandled Error in Silverlight Application " + errorMsg + "\");");
            }
            catch (Exception)
            {
            }
        }
    }
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Dr. Song Li

United States United States
I have been working in the IT industry for some time. It is still exciting and I am still learning. I am a happy and honest person, and I want to be your friend.

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