충돌 할 때 리 바인드 - 새로 고침 LongListMultiSelector

Question

내 윈도우 폰 응용 프로그램 충돌이 바인더 제본 목록의 새로운 인스턴스

BindedList 변경 만들기 :

OsyId = Response.recordedBills.Count > 50 ? new List<RecordedBillDetailViewModel>(Response.recordedBills.Take(50)) : new List<RecordedBillDetailViewModel>(Response.recordedBills); 

MultiSelector :

<toolkit:LongListMultiSelector ItemsSource="{Binding OsyId}" x:FieldModifier="public" x:Name="longList" EnforceIsSelectionEnabled="{Binding EnforceSelectionEnable}" Margin="0,0,10,0" SelectionChanged="LongListMultiSelector_SelectionChanged" IsSelectionEnabledChanged="LongListMultiSelector_IsSelectionEnabledChanged" MaxHeight="600" Grid.Row="1" HorizontalContentAlignment="Stretch"> 

충돌 보고서 :

를

{System.ArgumentException: Value does not fall within the expected range. 
    at MS.Internal.XcpImports.MethodEx(IntPtr ptr, String name, CValue[] cvData) 
    at MS.Internal.XcpImports.MethodPack(IntPtr objectPtr, String methodName, Object[] rawData) 
    at MS.Internal.XcpImports.UIElement_TransformToVisual(UIElement element, UIElement visual) 
    at System.Windows.UIElement.TransformToVisual(UIElement visual) 
    at Microsoft.Phone.Controls.LongListMultiSelector.ApplyItemsState(State state, Boolean useTransitions) 
    at Microsoft.Phone.Controls.LongListMultiSelector.OnIsSelectionEnabledChanged(DependencyPropertyChangedEventArgs e) 
    at Microsoft.Phone.Controls.LongListMultiSelector.OnIsSelectionEnabledPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) 
    at System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty dp, Object oldValue, Object newValue) 
    at System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, ValueOperation operation) 
    at System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp, Object value, Boolean allowReadOnlySet) 
    at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value) 
    at Microsoft.Phone.Controls.LongListMultiSelector.set_IsSelectionEnabled(Boolean value) 
    at Microsoft.Phone.Controls.LongListMultiSelector.UpdateIsSelectionEnabled() 
    at Microsoft.Phone.Controls.LongListMultiSelector.OnSelectionChanged(IList removedItems, IList addedItems) 
    at Microsoft.Phone.Controls.LongListMultiSelector.OnSelectedItemsCollectionCleared(Object sender, ClearedChangedArgs e) 
    at Microsoft.Phone.Controls.LongListMultiSelector.SelectedItemsList.ClearItems() 
    at System.Collections.ObjectModel.Collection1.Clear() 
    at Microsoft.Phone.Controls.LongListMultiSelector.OnItemsSourceChanged(Object oldValue, Object newValue) 
    at Microsoft.Phone.Controls.LongListMultiSelector.OnItemsSourcePropertyChanged(Object sender, DependencyPropertyChangedEventArgs e) 
    at System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty dp, Object oldValue, Object newValue) 
    at System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, ValueOperation operation) 
    at System.Windows.DependencyObject.RefreshExpression(DependencyProperty dp) 
    at System.Windows.Data.BindingExpression.SendDataToTarget() 
    at System.Windows.Data.BindingExpression.SourcePropertyChanged(PropertyPathListener sender, PropertyPathChangedEventArgs args) 
    at System.Windows.PropertyPathListener.RaisePropertyPathStepChanged(PropertyPathStep source) 
    at System.Windows.PropertyAccessPathStep.RaisePropertyPathStepChanged(PropertyListener source) 
    at System.Windows.CLRPropertyListener.SourcePropertyChanged(Object sender, PropertyChangedEventArgs args) 
    at System.Windows.Data.WeakPropertyChangedListener.PropertyChangedCallback(Object sender, PropertyChangedEventArgs args) 
    at System.ComponentModel.PropertyChangedEventHandler.Invoke(Object sender, PropertyChangedEventArgs e) 
    at Windows8.Common.Helpers.NotifyPropertyChanged.OnPropertyChanged(String propertyName) 
    at Windows8.Common.Helpers.NotifyPropertyChanged.SetProperty[T](T& storage, T value, String propertyName) 
    at Windows8.Common.ViewModels.BillPaymentViewModel.set_OsyId(List`1 value) 
    at Windows8.Common.ViewModels.BillPaymentViewModel.<InitiateBillRequestToRecordedBill>d__ee.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.GetResult() 
    at Windows8.Common.ViewModels.BillPaymentViewModel.<SetRecordedBillsAction>d__71.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.GetResult() 
    at Windows8.Common.ViewModels.CompanyMenu.<BillPaymentSubScreenAction>d__0.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.GetResult() 
    at Windows8.Common.Helpers.DelegateCommandAsync.<System.Windows.Input.ICommand.Execute>d__0.MoveNext()} 

어떻게 해결할 수 있습니까?

Answer 1

새 인스턴스를 만드는 대신 항목을 지우고 목록에 추가하십시오. 문제를 해결하는 데 도움이 될 수 있습니다. @Shubhan 말했듯이 OsyId 가정되는 것은 ObservableCollection<RecordedBillDetailViewModel>

var itemsToAdd = Response.recordedBills.Take(50); // Take 50 is fine even when the response does not have 50 items. Need not add a contion for it. 
OsyId.Clear(); 
foreach(var item in itemsToAdd) 
    OsyId.Add(item) 

감사하다, Shubhan

Answer 2

, 그것은는 INotifyCollectionChanged 이벤트를 사용하는 경우에만 ObservableCollection때문으로 바인드해야합니다. 목록은 IPropertyChangedEvent입니다. 이 같은 LongListSelector에 캐스팅 이벤트입니다 :

xxxxx as INotifyCollectionChange; 

는 그리고 리 바인딩 또는 거래의 크기를 조정하기위한 xxxx 이벤트를 사용하고 있습니다.

감사합니다.