binding pagesize of dapapager

[na hui]

Requirements
RadControls version	2012.3.1017.1050
.NET version	4.0
Visual Studio version	2010
programming language	C#
browser support	all browsers supported by RadControls

<telerik:RadDomainDataSource x:Name="DS" QueryName="GetB_Dict" AutoLoad="True">
                    <telerik:RadDomainDataSource.DomainContext>
                        <my:DomainService1 />
                    </telerik:RadDomainDataSource.DomainContext>
                    <telerik:RadDomainDataSource.FilterDescriptors>
                        <telerik:FilterDescriptor Member="Type" Operator="IsEqualTo" Value="type1" />
                    </telerik:RadDomainDataSource.FilterDescriptors>
                </telerik:RadDomainDataSource>

<telerik:RadDataPager Grid.Row="3" Margin="0,-1,0,0" PageSize="{Binding myPageSize}"
          Source="{Binding DataView,ElementName=DS}"
          IsTotalItemCountFixed="True" DisplayMode="FirstLastPreviousNextNumeric, Text" />

In the case, if in the RadDomainDataSource have telerik:RadDomainDataSource.FilterDescriptors , and the RadDataPager property PageSize="{Binding myPageSize}",  then throw error   Cannot set property PageSize when CanLoad is false.

位于 Telerik.Windows.Controls.RadDomainDataSource.OnPageSizeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   位于 Telerik.Windows.PropertyMetadata.PropertyChangeHook.OnPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   位于 System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty dp, Object oldValue, Object newValue)
   位于 System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, ValueOperation operation)
   位于 System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp, Object value, Boolean allowReadOnlySet, Boolean isBindingInStyleSetter)
   位于 Telerik.Windows.Controls.RadDomainDataSource.OnViewPropertyChanged(Object sender, PropertyChangedEventArgs e)
   位于 System.ComponentModel.PropertyChangedEventHandler.Invoke(Object sender, PropertyChangedEventArgs e)
   位于 Telerik.Windows.Data.QueryableCollectionView.OnPropertyChanged(PropertyChangedEventArgs e)
   位于 Telerik.Windows.Data.QueryableDomainServiceCollectionViewBase.OnPropertyChanged(PropertyChangedEventArgs e)
   位于 Telerik.Windows.Data.QueryableCollectionView.set_PageSize(Int32 value)
   位于 Telerik.Windows.Data.DataItemCollection.set_PageSize(Int32 value)
   位于 Telerik.Windows.Controls.Data.DataPager.DataPagerViewModel.set_PageSize(Int32 value)
   位于 Telerik.Windows.Controls.Data.DataPager.DataPagerViewModel..ctor(IEnumerable source, Int32 pageSize, Boolean isTotalItemCountFixed, Int32 pageIndex)
   位于 Telerik.Windows.Controls.RadDataPager.get_ViewModel()
   位于 Telerik.Windows.Controls.RadDataPager.UpdateItemCount()
   位于 Telerik.Windows.Controls.RadDataPager.UpdateControl()
   位于 Telerik.Windows.Controls.RadDataPager.OnSourcePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   位于 Telerik.Windows.PropertyMetadata.PropertyChangeHook.OnPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   位于 System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty dp, Object oldValue, Object newValue)
   位于 System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, ValueOperation operation)
   位于 System.Windows.DependencyObject.RefreshExpression(DependencyProperty dp)
   位于 System.Windows.Data.BindingExpression.SendDataToTarget()
   位于 System.Windows.Data.BindingExpression.SourceAcquired()
   位于 System.Windows.Data.BindingExpression.PerformTargetLoaded()
   位于 System.Windows.Data.BindingExpression.TargetLoaded(Object o, RoutedEventArgs e)
   位于 MS.Internal.CoreInvokeHandler.InvokeEventHandler(UInt32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
   位于 MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName, UInt32 flags)

Help me! thanks!

[na hui]

hello , Why didn't answer.