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Presentation Model (MVVM) Good Practices

, 11 May 2010
Showing some good practices that can be applied to the Presentation Model/MVVM pattern.
PresentationModelDemo.zip
App.Configuration
App.Configuration.Wpf
Interceptors
Properties
Wpf
Properties
Wpf
App.Core
Model
PresentationModel
Properties
Services
App.Data
Properties
libs
AttachedCommandBehavior.dll
Castle.Core.dll
Castle.DynamicProxy2.dll
Castle.MicroKernel.dll
Castle.Windsor.dll
PresentationModelBase
Properties
WPFUI
Properties
Settings.settings
View
using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Reflection;

namespace PresentationModelBase
{
    /// <summary>
    /// Base class for all PresentationModels.
    /// </summary>
    public abstract class PresentationModel : IPresentationModel
    {
        static PresentationModel()
        {
            _serviceLocator = AppDomain.CurrentDomain.GetData("servicelocator") as IServiceProvider;
            if (_serviceLocator == null)
                _serviceLocator = CreateProvider();
        }

        private static IServiceProvider CreateProvider()
        {
            ServiceCreator creator = new ServiceCreator();
            return new ServiceContainer(creator);
        }

        #region Fields

        static IServiceProvider _serviceLocator;

        #endregion

        #region Methods

        protected T Get<T>()
        {
            return (T)_serviceLocator.GetService(typeof(T));
        }

        public virtual void InvokeMethod(string methodName, object[] parameters, params Type[] typeParameters)
        {
            MethodInfo currentMethod = this.GetType().GetMethod(methodName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
            if (currentMethod == null)
                throw new ArgumentException("Cannot find this method");

            Type returnType = currentMethod.ReturnType;
            if (returnType != typeof(void))
                throw new ArgumentException("Methods called by this command must return void");

            if (currentMethod.IsGenericMethodDefinition)
                currentMethod = currentMethod.MakeGenericMethod(typeParameters);

            currentMethod.Invoke(this, parameters);
        }

        #endregion

        #region Properties

        private string _displayName;
        public virtual string DisplayName
        {
            get { return _displayName; }
            set { _displayName = value; }
        }

        #endregion

        #region INotifyPropertyChanged Members

        private PropertyChangedEventHandler _handler;
        public event PropertyChangedEventHandler PropertyChanged
        {
            add { _handler += value; }
            remove { _handler -= value; }
        }

        protected virtual void OnPropertyChanged(string propertyName)
        {
            if (_handler != null)
            {
                var e = new PropertyChangedEventArgs(propertyName);
                _handler(this, e);
            }
        }

        #endregion

        #region IDisposable Members

        public void Dispose()
        {
            OnDispose();
        }

        protected virtual void OnDispose() { }

        #endregion
    }
}

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Web03 | 2.8.140721.1 | Last Updated 11 May 2010
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