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Posted 24 Apr 2009

MVVM Dynamic Commands

, 24 Apr 2009
Implementing dynamic WPF ICommands in Model-View-ViewModel architecture
ListBoxHyperlinkDemo
Documentation
MVVM Dynamic Commands.docx
ListBoxHyperlinkDemo.suo
ListBoxHyperlinkDemo
bin
Debug
ListBoxHyperlinkDemo.exe
ListBoxHyperlinkDemo.vshost.exe
ListBoxHyperlinkDemo.vshost.exe.manifest
Domain
Properties
View
ViewModel
Commands
ValueConverters
using System.Windows;
using ListBoxHyperlinkDemo.Domain;
using ListBoxHyperlinkDemo.ViewModel;
using ListBoxHyperlinkDemo.View;

namespace ListBoxHyperlinkDemo
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            base.OnStartup(e);

            // Set up view model
            MainWindowViewModel viewModel = new MainWindowViewModel();

            // Add alert that invokes EditTransaction
            Alert newAlert = new Alert("Deposit transaction is pending", "Complete transaction", "CompleteTransaction" );
            viewModel.Alerts.Add(newAlert);

            // Add alert that invokes ReviewAccount
            newAlert = new Alert("Entertainment account has a negative balance", "Review account", "ReviewAccount");
            viewModel.Alerts.Add(newAlert);

            // Add alert that invokes no command
            newAlert = new Alert("Dividend due on S&P 500 fund", null, null);
            viewModel.Alerts.Add(newAlert);

            /* We instantiate our CommandConverter here, so that we can
             * pass the view model to it. Then we add it to the main
             * window resource dictionary, where it is available to XAML. */

            // Create and initialize main window
            Resources.Add("CommandConverter", new CommandConverter(viewModel));
            MainWindow mainWindow = new MainWindow();
            mainWindow.DataContext = viewModel;
            mainWindow.Show();
        }
    }
}

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About the Author

David Veeneman
Software Developer (Senior) Foresight Systems
United States United States
David Veeneman is a financial planner and software developer. He is the author of "The Fortune in Your Future" (McGraw-Hill 1998). His company, Foresight Systems, develops planning and financial software.

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