VisualPascalABCNET/FormsDesignerBinding/Dependecies/src/Main/ICSharpCode.SharpDevelop.Widgets/Project/ViewModelBase.cs - master - n-dimens/pascalabcnet

VisualPascalABCNET/FormsDesignerBinding/Dependecies/src/Main/ICSharpCode.SharpDevelop.Widgets/Project/ViewModelBase.cs

74 строки2 KB

Бондарев Иван

initial commit

14 май 2015, 22:35

14 май 2015, 22:35e6e67c1

// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)

using System;
using System.ComponentModel;
using System.Linq.Expressions;
using System.Reflection;

namespace ICSharpCode.SharpDevelop.Widgets
{
	/// <summary>
	/// Description of ViewModelBase.
	/// </summary>
	public class ViewModelBase:INotifyPropertyChanged
	{
		public ViewModelBase()
		{
		}
		
		
		public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;

		protected virtual void OnPropertyChanged(System.ComponentModel.PropertyChangedEventArgs e)
		{
			var handler = this.PropertyChanged;
			if (handler != null)
			{
				handler(this, e);
			}
		}
		
		
		protected void RaisePropertyChanged<T>(Expression<Func<T>> propertyExpresssion)
		{
			var propertyName = ExtractPropertyName(propertyExpresssion);
			this.RaisePropertyChanged(propertyName);
		}

		
		protected void RaisePropertyChanged(String propertyName)
		{
			OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
		}
		
		
		private static String ExtractPropertyName<T>(Expression<Func<T>> propertyExpresssion)
		{
			if (propertyExpresssion == null)
			{
				throw new ArgumentNullException("propertyExpresssion");
			}

			var memberExpression = propertyExpresssion.Body as MemberExpression;
			if (memberExpression == null)
			{
				throw new ArgumentException("The expression is not a member access expression.", "propertyExpresssion");
			}

			var property = memberExpression.Member as PropertyInfo;
			if (property == null)
			{
				throw new ArgumentException("The member access expression does not access a property.", "propertyExpresssion");
			}

			var getMethod = property.GetGetMethod(true);
			if (getMethod.IsStatic)
			{
				throw new ArgumentException("The referenced property is a static property.", "propertyExpresssion");
			}

			return memberExpression.Member.Name;
		}
	}
}