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A Guide to Cleaner XAML with Custom Namespaces and Prefixes (WPF/Silverlight)

, 22 Sep 2010
Clean up and manage your XAML references. This can be done using custom namespaces (scheme URLs) and custom prefixes.
Sandworks.Silverlight.NamespaceExample.zip
Sandworks.Silverlight.NamespaceExample
Sandworks.Silverlight.NamespaceExample
Sandworks.Silverlight.NamespaceExample.ClassLibrary
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Debug
Converters
Properties
Sandworks.Silverlight.NamespaceExample.ClassLibrary.csproj.user
Sandworks.Silverlight.NamespaceExample.suo
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Controls
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Sandworks.Silverlight.NamespaceExample.csproj.user
Sandworks.Silverlight.NoNamespaceExample
Sandworks.Silverlight.NoNamespaceExample.ClassLibrary
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Sandworks.Silverlight.NoNamespaceExample.ClassLibrary.csproj.user
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Sandworks.Silverlight.NoNamespaceExample.csproj.user
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 Sandworks.Silverlight.NamespaceExample
{
    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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About the Author

Sandrino Di Mattia
Technical Lead RealDolmen
Belgium Belgium
I'm a Technical Consultant at RealDolmen, one of the largest players on the Belgian IT market: http://www.realdolmen.com
 
All posts also appear on my blogs: http://blog.sandrinodimattia.net and http://blog.fabriccontroller.net
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