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Creating View-Switching Applications with Prism 4

, 6 Mar 2011
How to get a Prism 4 line-of-business application up and running, using WPF and the Unity Dependency Injection (DI) container.
Prism4Demo.zip
Prism4Demo
Prism4Demo.Common
BaseClasses
bin
Events
obj
Debug
TempPE
Prism4Demo.Common.csproj.user
Properties
Prism4Demo.Library
FsTools
FsTaskButton.dll
Prism
Microsoft.Practices.Prism.dll
Microsoft.Practices.Prism.UnityExtensions.dll
Microsoft.Practices.ServiceLocation.dll
Microsoft.Practices.Unity.dll
Ribbon
RibbonControlsLibrary.dll
Prism4Demo.ModuleA
bin
Commands
obj
Debug
TempPE
Views
Prism4Demo.ModuleA.csproj.user
Properties
Settings.settings
Services
ViewModels
Views
Images
LargeIcon.png
module_a.png
SmallIcon.png
Prism4Demo.ModuleB
bin
Commands
obj
Debug
TempPE
Views
Prism4Demo.ModuleB.csproj.user
Properties
Settings.settings
Services
ViewModels
Views
Images
LargeIcon.png
module_b.png
SmallIcon.png
Prism4Demo
bin
obj
x86
Debug
TempPE
Views
Prism4Demo.csproj.user
Properties
Settings.settings
Services
Utility
ViewModels
Views
Images
LargeIcon.png
new.png
open.png
print.png
ribbon.png
save.png
SmallIcon.png
using System.ComponentModel;

namespace Prism4Demo.Common.BaseClasses
{
     public abstract class ViewModelBase : INotifyPropertyChanging, INotifyPropertyChanged
     {
          #region INotifyPropertyChanging Members

          public event PropertyChangingEventHandler PropertyChanging;

          #endregion

          #region INotifyPropertyChanged Members

          public event PropertyChangedEventHandler PropertyChanged;

          #endregion

          #region Administrative Properties

          /// <summary>
          /// Whether the view model should ignore property-change events.
          /// </summary>
          public virtual bool IgnorePropertyChangeEvents { get; set; }

          #endregion

          #region Public Methods

          /// <summary>
          /// Raises the PropertyChanged event.
          /// </summary>
          /// <param name="propertyName">The name of the changed property.</param>
		public virtual void RaisePropertyChangedEvent(string propertyName)
        {
            // Exit if changes ignored
            if (IgnorePropertyChangeEvents) return;

            // Exit if no subscribers
            if (PropertyChanged == null) return;

            // Raise event
            var e = new PropertyChangedEventArgs(propertyName);
            PropertyChanged(this, e);
        }

          /// <summary>
          /// Raises the PropertyChanging event.
          /// </summary>
          /// <param name="propertyName">The name of the changing property.</param>
        public virtual void RaisePropertyChangingEvent(string propertyName)
        {
            // Exit if changes ignored
            if (IgnorePropertyChangeEvents) return;

            // Exit if no subscribers
            if (PropertyChanging == null) return;

            // Raise event
            var e = new PropertyChangingEventArgs(propertyName);
            PropertyChanging(this, e);
        }

          #endregion
     }
}

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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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