using System.ComponentModel; using System.ComponentModel.Composition; using GalaSoft.MvvmLight; using SchoolSample.Common; namespace SchoolSample.ViewModel { [Export(ViewModelTypes.MainPageViewModel, typeof(ViewModelBase))] [PartCreationPolicy(CreationPolicy.NonShared)] public class MainPageViewModel : ViewModelBase { #region "Private Data Members" private ISchoolModel _schoolModel; #endregion "Private Data Members" #region "Constructor" [ImportingConstructor] public MainPageViewModel(ISchoolModel orderItModel) { _schoolModel = orderItModel; // set up error handling _schoolModel.AllowMultipleErrors = false; _schoolModel.ClearLastError(); // set up event handling _schoolModel.PropertyChanged += _schoolModel_PropertyChanged; // set the initial values IsBusy = _schoolModel.IsBusy; } #endregion "Constructor" #region "Public Properties" public bool IsBusy { get { return _isBusy; } private set { if (value != _isBusy) { _isBusy = value; RaisePropertyChanged("IsBusy"); } } } private bool _isBusy; #endregion "Public Properties" #region "Private Methods" /// <summary> /// Event handler for PropertyChanged /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void _schoolModel_PropertyChanged(object sender, PropertyChangedEventArgs e) { switch (e.PropertyName) { case "IsBusy": IsBusy = _schoolModel.IsBusy; break; } } #endregion "Private Methods" } }
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