inotifypropertychanged

I have found myself recently writing a lot of boilerplate MVVM code and wonder if there is a fancy way to get around writing it all? I already use a ViewModelBase class that implements INotifyPropertyChanged but that doesnt solve the problem of having to write all the accessor code etc. Perhaps by writing a custom attribute that does this, or via a templating system? public MyClass : ViewModelBase { private int someVariable; public int SomeVariable { get { return this.someVariable; } set { this.someVariable = value; this.NotifyPropertyChanged("SomeVariable"); } } } I have a snippet that i use

The MSDN reference page for ObservableCollection<T> notes: "The objects in your collection must satisfy the requirements described in the Binding Sources Overview . In particular, if you are using OneWay or TwoWay (for example, you want your UI to update when the source properties change dynamically), you must implement a suitable property changed notification mechanism such as the INotifyPropertyChanged interface." Since ObservableCollection<T> already implements INotifyPropertyChanged , why do I need to again implement INotifyPropertyChanged on T also? Consider your observable collection as

I recently find out that wpf handles INotifyPropertyChanged in two different ways. I just wanna know what's the reason. Let us take a normal twoway binding with validation true. if you set a property from ui to viewmodel it goes like this. setter call started value set INotifyPropertyChanged started INotifyPropertyChanged done setter done getter called and done IDataErrorInfo called and done but if you set the property in your viewmodel it goes like this setter call started value set INotifyPropertyChanged started getter called and done IDataErrorInfo called and done INotifyPropertyChanged

How would one implement INotifyPropertyChanged for use in an F# type? Thanks! It's basically the same as in any other language: open System.ComponentModel type MyType() = let ev = new Event<_,_>() let mutable str = "" member x.StringProp with get() = str and set(str') = str <- str' ev.Trigger(x, PropertyChangedEventArgs("StringProp")) interface INotifyPropertyChanged with [<CLIEvent>] member x.PropertyChanged = ev.Publish https://github.com/Fody/PropertyChanged https://github.com/Fody/PropertyChanged/issues/280 In practice You can use fody proeprty changed to automatically implement it public

The question is how to implement INotifyPropertyChanged on a static property because the event you implement is not static, and cannot be called by a static property. Also, you cannot bind to a static property in Silverlight. I've seen this question pop up an a few forums with a variety of solutions, none of which were very satisfying. Well, I think I've found an elegant solution, but it's so simple I feel like I must be missing something. The answer is, to write a non-static property that accesses a static variable like so: private static double length; public double Length { get { return

I have a parent object called Page that has a List of objects called Control: public class Page { List<CustomControl> controls {get;set;} } The CustomControl class has the following defintion: public class CustomControl { string Name {get;set;} string Value {get;set;} } Say for instance the Page class has two CustomControls A and B. Is it possible to Notify Custom Control B when the property Value of Custom Control A changes so that it can change some of its properties. I was thinking of implementing the INotifyPropertyChanged event on the CustomControl class now how do I notify an instance of

I have seen the following pattern used for implementing INotifyPropertyChanged private void NotifyPropertyChanged(string propertyName) { PropertyChangedEventHandler handler = PropertyChanged; if (handler != null) { handler(this, new PropertyChangedEventArgs(propertyName)); } } public event PropertyChangedEventHandler PropertyChanged; Can someone explain to me the necessity of the var handler = PropertyChanged assignment prior to checking it for null versus directly checking PropertyChanged == null directly? Thanks Eric Lippert explains this in details in this blog article: Events and races .