Tips: Save some typing when binding values to UI in WPF/Silverlight

Asweallknow,InWPForSilverlightapplication,ifwewanttoupdatethevalueintheUIwhentheunderlyingdatahaschanged,theclassneedtoimplementthe"INotifyPropertyChanged”interface,whichcontainsonedelegate"PropertyChangedEventHandler”.

Socreateanewmethod,andtaketheincomingparameterandpassittotheeventargument,makesurecallthemethodeverytimewhenthepropertyhaschanged.justlikethestandardtextbooksaid.

Howaboutcreatethatmethodthisway:

ImportSystem.Runtime.CompilerServicesnamespace.

publiceventPropertyChangedEventHandlerPropertyChanged;

privatevoidOnPropertyChanged([CallerMemberName]stringcaller="")

{

if(PropertyChanged!=null)

{

PropertyChanged(this,newPropertyChangedEventArgs(caller));

}

}

With[CallerMemberName]attribute,youdon’thavetoexplicitpassinthepropertynameanymore,justcallitinthesetpart,Frameworkwilltakecareoftherest.likethis:

privatestring_foo;

publicstringFoo

{

get

{

return_foo

}

set

{

_foo=value;

OnPropertyChanged();

}

}

It’snotsomebigorfancythings,butmaybeyourkeyboardwilllivelonger.