C# INotifyPropertyChanged在silverlight c中频繁调用时出错#
我已经创建了一个基本视图模型,将我所有视图模型的所有公共属性都放入其中,并由我的C#Silverlight应用程序的所有视图模型实现 我的基本视图模型还为所有视图模型实现了C# INotifyPropertyChanged在silverlight c中频繁调用时出错#,c#,silverlight,telerik,inotifypropertychanged,silverlight-5.0,C#,Silverlight,Telerik,Inotifypropertychanged,Silverlight 5.0,我已经创建了一个基本视图模型,将我所有视图模型的所有公共属性都放入其中,并由我的C#Silverlight应用程序的所有视图模型实现 我的基本视图模型还为所有视图模型实现了INotifyPropertyChanged接口 public event PropertyChangedEventHandler PropertyChanged; protected void NotifyPropertyChanged(string propertyName) { if (
INotifyPropertyChanged
接口
public event PropertyChangedEventHandler PropertyChanged;
protected void NotifyPropertyChanged(string propertyName)
{
if (this.PropertyChanged != null)
{
this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
当我频繁调用PropertyChanged
事件时,我得到错误:
Error HRESULT E_FAIL has been returned from a call to a COM component.
堆栈跟踪为
at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
at MS.Internal.XcpImports.SetValue(IManagedPeerBase obj, DependencyProperty property, DependencyObject doh)
at MS.Internal.XcpImports.SetValue(IManagedPeerBase doh, DependencyProperty property, Object obj)
at System.Windows.DependencyObject.SetObjectValueToCore(DependencyProperty dp, Object value)
at System.Windows.DependencyObject.SetEffectiveValue(DependencyProperty property, EffectiveValueEntry& newEntry, 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, Boolean isBindingInStyleSetter)
at System.Windows.Controls.Control.set_DefaultStyleKey(Object value)
at System.Windows.Controls.ContentControl..ctor()
at MS.Internal.CoreTypes.GetCoreWrapper(UInt32 typeId)
at MS.Internal.ManagedPeerTable.EnsureManagedPeer(IntPtr unmanagedPointer, Int32 typeIndex, Type type, Boolean preserveManagedObjectReference)
at MS.Internal.XcpImports.ConvertDO(IntPtr doPointer, Int32 typeIndex, Boolean releaseObjectReference)
at MS.Internal.XcpImports.ConvertType(CValue outVal, Int32 typeIndex, Boolean releaseObjectReference, Boolean deleteBuffer, IManagedPeerBase fromObject)
at MS.Internal.XcpImports.ConvertCValueForManagedWithType(Type propertyType, CValue& outVal, Int32 outDOType, Boolean releaseObjectReference, Boolean deleteBuffer, IManagedPeerBase fromObject)
at MS.Internal.XcpImports.GetValue(IManagedPeerBase managedPeer, DependencyProperty property)
at System.Windows.DependencyObject.GetValueInternal(DependencyProperty dp)
at System.Windows.FrameworkElement.GetValueInternal(DependencyProperty dp)
at System.Windows.FrameworkElement.get_Parent()
at Telerik.Windows.RadRoutedEventHelper.FindParent(FrameworkElement item)
at Telerik.Windows.RadRoutedEventHelper.BuildRoute(DependencyObject element, EventRoute route, RadRoutedEventArgs args)
at Telerik.Windows.RadRoutedEventHelper.RaiseEvent(DependencyObject element, RadRoutedEventArgs args)
at Telerik.Windows.DependencyObjectExtensions.RaiseEvent(DependencyObject element, RadRoutedEventArgs e)
at Telerik.Windows.Controls.Selector.OnSelectionChanged(SelectionChangedEventArgs e)
at Telerik.Windows.Controls.RadComboBox.OnSelectionChanged(SelectionChangedEventArgs e)
at Telerik.Windows.Controls.Selector.OnSelectionChanged(Object sender, SelectionChangedEventArgs e)
at Telerik.Windows.Controls.Selector.SelectionChanger`1.InvokeSelectionChangedEvent()
at Telerik.Windows.Controls.Selector.SelectionChanger`1.End()
at Telerik.Windows.Controls.Selector.SelectionChanger`1.SelectJustThisItem(T item)
at Telerik.Windows.Controls.Selector.SelectItemWithValue(Object value)
at Telerik.Windows.Controls.Selector.CoerceSelectedValue(Object value)
at Telerik.Windows.Controls.Selector.OnCoerceSelectedValue(DependencyObject sender, Object newValue)
at Telerik.Windows.PropertyMetadata.DoCoercion(Func`3 areValuesEqual, DependencyObject d, DependencyProperty dp, CoerceValueCallback coerceCallback, Object defaultBaseValue, Boolean forceNewBaseValue, Boolean& isReentrantImplicitCoercion)
at Telerik.Windows.PropertyMetadata.PropertyChangeHook.OnPropertyChanged(DependencyObject d, 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.SourceAcquired()
at System.Windows.Data.Debugging.BindingBreakPoint.<>c__DisplayClass4.<BreakOnSharedType>b__3()
在MS.Internal.XcpImports.CheckHResult(UInt32小时)
在MS.Internal.XcpImports.SetValue处(IManagedPeerBase对象,DependencyProperty属性,DependencyObject doh)
在MS.Internal.XcpImports.SetValue处(IManagedPeerBase doh,dependencProperty属性,对象obj)
位于System.Windows.DependencyObject.SetObjectValueToCore(DependencyProperty dp,对象值)
位于System.Windows.DependencyObject.SetEffectiveValue(DependencyProperty属性、EffectiveValueEntry和newEntry、Object newValue)
在System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty属性、EffectiveValueEntry oldEntry、EffectiveValueEntry&newEntry、ValueOperation操作)
位于System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp、对象值、布尔AllowareAdonlySet、布尔isBindingInStyleSetter)
在System.Windows.Controls.Control.set\u DefaultStyleKey(对象值)中
在System.Windows.Controls.ContentControl..ctor()中
位于MS.Internal.CoreTypes.GetCoreWrapper(UInt32 typeId)
在MS.Internal.ManagedPeerTable.ensureNamedpeer(IntPtr非托管指针、Int32类型索引、类型类型、布尔保留ManagedObjectReference)
在MS.Internal.XcpImports.ConvertDO(IntPtr doPointer、Int32 typeIndex、Boolean releaseObjectReference)
在MS.Internal.XcpImports.ConvertType(CValue outVal、Int32 typeIndex、Boolean releaseObjectReference、Boolean deleteBuffer、IManagedPeerBase fromObject)
在MS.Internal.XcpImports.ConvertCValueForManagedWithType(类型propertyType、CValue&outVal、Int32 outDOType、Boolean releaseObjectReference、Boolean deleteBuffer、IManagedPeerBase fromObject)
位于MS.Internal.XcpImports.GetValue(IManagedPeerBase managedPeer,DependencyProperty属性)
位于System.Windows.DependencyObject.GetValueInternal(DependencyProperty dp)
位于System.Windows.FrameworkElement.GetValueInternal(DependencyProperty dp)
在System.Windows.FrameworkElement.get_Parent()中
在Telerik.Windows.RadRoutedEventHelper.FindParent(框架元素项)
在Telerik.Windows.RadRoutedEventHelper.BuildRoute(DependencyObject元素、EventRoute路由、RadRoutedEventArgs参数)
在Telerik.Windows.RadRoutedEventHelper.RaiseEvent(DependencyObject元素,RadRoutedEventArgs参数)
在Telerik.Windows.DependencyObjectExtensions.RaiseEvent(DependencyObject元素,RadRoutedEventArgs e)
在Telerik.Windows.Controls.Selector.OnSelectionChanged(SelectionChangedEventArgs e)
在Telerik.Windows.Controls.RadComboBox.OnSelectionChanged(SelectionChangedEventArgs e)
在Telerik.Windows.Controls.Selector.OnSelectionChanged(对象发送器,SelectionChangedEventArgs e)
在Telerik.Windows.Controls.Selector.SelectionChanger`1.InvokeSelectionChangedEvent()中
在Telerik.Windows.Controls.Selector.SelectionChanger`1.End()中
在Telerik.Windows.Controls.Selector.SelectionChanger`1.选择JustThisItem(T项)
在Telerik.Windows.Controls.Selector.SelectItemWithValue(对象值)中
在Telerik.Windows.Controls.Selector.胁迫选择值(对象值)
在Telerik.Windows.Controls.Selector.OnCorCeSelectedValue(DependencyObject sender,Object newValue)
在Telerik.Windows.PropertyMetadata.DoCoercion(函数'3为ValueSequal、DependencyObject d、DependencyProperty dp、强制值回调强制回调、对象defaultBaseValue、布尔值forceNewBaseValue、布尔值和IsReentrantimPlicitImplicity强制)
在Telerik.Windows.PropertyMetadata.PropertyChangeHook.OnPropertyChanged(DependencyObject d,DependencyPropertyChangedEventArgs e)
位于System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty dp、Object oldValue、Object newValue)
在System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty属性、EffectiveValueEntry oldEntry、EffectiveValueEntry&newEntry、ValueOperation操作)
位于System.Windows.DependencyObject.RefreshExpression(DependencyProperty dp)
位于System.Windows.Data.BindingExpression.SendDataToTarget()处
位于System.Windows.Data.BindingExpression.SourceAcquired()处
在System.Windows.Data.Debugging.BindingBreakPoint.c__DisplayClass4.b__3()中
没有发现INotifyPropertyChanged的实现有任何问题,但是我怀疑您的代码导致了无限循环
如果您可以共享一个可以重现您的问题的示例项目,人们可能会帮助您解决问题。您是否更改过后台线程上的任何属性?不,它在ui线程中总是更改。我认为它可能与您正在使用的Telerik控件有关。你试过联系技术支持吗?否则,您需要制作一个可以重现问题的样本。我也实现了ViewModelBase和INP,但我没有问题,所以我认为这个问题可能与绑定或Telerik的方式有关。您设置了什么属性值?在我看来,设置的值无效。我怀疑这取决于电话的频率。