實(shí)現(xiàn)INotifyPropertyChanged接口后 當(dāng)后臺(tái)數(shù)據(jù)有變化時(shí)，通過(guò)調(diào)用OnPropertyChanged發(fā)放通知界面 ， PropertyChangedEventHandler handler = PropertyChanged;   if (handler != null)            {                handler(this, new PropertyChangedEventArgs(propertyName));            } 我想問(wèn)一下在后臺(tái)此時(shí)能不能獲取到對(duì)應(yīng)綁定到的前臺(tái)的控件