Advanced Search

Return to Snippet

Revision: 42512
at March 5, 2011 22:31 by nimast
Initial Code 
public class PresenterBase : INotifyPropertyChanged
    {
        private string _myProperty;
        public string MyProperty
        {
            get
            {
                return _myProperty;
            }
            set
            {
                _myProperty = value;
                OnPropertyChanged(() => MyProperty);
            }
        }

        protected virtual void OnPropertyChanged<T>(Expression<Func<T>> propertyEvaluator)
        {
            var lambda = propertyEvaluator as LambdaExpression;
            var member = lambda.Body as MemberExpression;
            var handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(member.Member.Name));
            }
        }

        #region INotifyPropertyChanged Members

        public event PropertyChangedEventHandler PropertyChanged;

        #endregion
    }
Initial URL 

                                

                                                            

                                    

                                        

                                        Initial Description
                                        

                                    

                                    
The only way i know to create a normal "fire property changed" method that is still efficient yet strongly typed. The other common pattern uses run time checking and uses the TyepDescriptor for the current type to check for property existence - a much less elegant solution imho.

                                

                                                            

                                    

                                        

                                        Initial Title
                                        

                                    

                                    
NotifyPropertyChanged

                                

                                                            

                                    

                                        

                                        Initial Tags
                                        

                                    

                                    
c#

                                

                                                            

                                    

                                        

                                        Initial Language
                                        

                                    

                                    
C#