The code as below, run it ,will raise System.InvalidOperationException.
<TabControl Grid.Row="1" Name="tabControl1" >
<TabItem Header="概览" Name="tabItem1">
<DataGrid x:Name="OverviewDataGrid"
ItemsSource="{Binding Path=Model}"
SelectedItem="{Binding SelectedItem, Mode=TwoWay}"
AutoGenerateColumns="False"
IsSynchronizedWithCurrentItem="True"
IsReadOnly="True" CanUserAddRows="True" >
<DataGrid.Columns>
<DataGridTextColumn Header="BOM编号" Binding="{Binding BOMNo}" Width="100" />
<DataGridTextColumn Header="名称" Binding="{Binding Name}" Width="50"/>
<DataGridTextColumn Header="物料编号" Binding="{Binding MaterialNo}" Width="150"/>
</DataGrid.Columns>
</DataGrid>
</TabItem>
<TabItem Header="基本" >
<Grid DataContext="{Binding Path=SelectedItem}">
<Grid.RowDefinitions >
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="306"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="306"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<DatePicker Grid.Row="4" Grid.Column="1" Width="300" Margin="3" SelectedDate="{Binding Path=ValidFrom,Mode=TwoWay,ValidatesOnExceptions=true, NotifyOnValidationError=true}"/>
<csla:PropertyStatus Grid.Column="2" Grid.Row="4" Margin="3" Width="20" Height="20" Property="{Binding Path=VaildFrom }"/>
</Grid>
</TabItem>
</TabControl>
the code have several propertystatus, if only remove the propertystatus(Bold), it work well
Enviroment: Csla 4.2.1,vs2010
I am experiencing the exact same thing!
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I look up a old post:http://forums.lhotka.net/forums/p/7389/35383.aspx#35383. I tried to remove the tabcontrol, but it still not work. and i change my code as below, it can work.
<TabItem Header="基本" >
<Grid >
<Grid.RowDefinitions >
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="306"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="306"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Label Content="物料清单编号:" Grid.Row="0" Grid.Column=" 0"/>
<TextBox Grid.Row="0" Grid.Column="1" Width="300" Text="{Binding SelectedItem.BOMNo,UpdateSourceTrigger=PropertyChanged}" Style="{StaticResource DefaultTextBoxStyle}"/>
<Label Content="物料清单名称:" Grid.Row="1" Grid.Column="0"/>
<TextBox Grid.Row="1" Grid.Column="1" Width="300" Text="{Binding SelectedItem.Name,UpdateSourceTrigger=PropertyChanged}" Style="{StaticResource DefaultTextBoxStyle}"/>
<Label Content="描述：" Grid.Row="2" Grid.Column="0"/>
<TextBox Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="4" Width="483" Height="40" Text="{Binding Path=Descripition, UpdateSourceTrigger=PropertyChanged }" Style="{StaticResource DefaultTextBoxStyle}" Margin="3,3,0,3" />
<Label Content="物料:" Grid.Row ="3" Grid.Column="0"/>
<StackPanel Grid.Row="3" Grid.Column="1" Width="300" HorizontalAlignment="Left" Orientation="Horizontal">
<TextBox Width="250" Margin="3" Text="{Binding Path=SelectedItem.MaterialNo}" IsReadOnly="True" />
<Button Width="30" Margin="3" Content="..." Command="{Binding Path=DataContext.SetMaterialCommand, RelativeSource={RelativeSource FindAncestor, AncestorType=TabControl}}"/>
</StackPanel>
<Label Grid.Row="3" Grid.Column="3" Content="{Binding MaterialName}"/>
<Label Content="生效日期:" Grid.Row="4" Grid.Column="0"/>
<DatePicker Grid.Row="4" Grid.Column="1" Width="300" Margin="3" SelectedDate="{Binding Path=SelectedItem.ValidFrom,Mode=TwoWay,ValidatesOnExceptions=true, NotifyOnValidationError=true}"/>
<csla:PropertyStatus Grid.Column="2" Grid.Row="0" Margin="3" Width="20" Height="20" Property="{Binding Path=SelectedItem.BOMNo }" />
<csla:PropertyStatus Grid.Column="2" Grid.Row="1" Margin="3" Width="20" Height="20" Property="{Binding Path=SelectedItem.Name }" />
<csla:PropertyStatus Grid.Column="2" Grid.Row="3" Margin="3" Width="20" Height="20" Property="{Binding Path=SelectedItem.MaterialNo }"/>
<csla:PropertyStatus Grid.Column="2" Grid.Row="4" Margin="3" Width="20" Height="20" Property="{Binding Path=SelectedItem.VaildFrom}"/>
</Grid>
</TabItem>
用户代码未处理 System.NullReferenceException
Message=未将对象引用设置到对象的实例。
Source=Csla
StackTrace:
在 Csla.Reflection.MethodCaller.GetPropertyValue(Object obj, PropertyInfo info)
在 Csla.Xaml.PropertyStatus.GetRealSource(Object source, String bindingPath)
在 Csla.Xaml.PropertyStatus.SetSource(Object dataItem)
在 Csla.Xaml.PropertyStatus.<.ctor>b__2(Object o, DependencyPropertyChangedEventArgs e)
在 System.Windows.FrameworkElement.RaiseDependencyPropertyChanged(EventPrivateKey key, DependencyPropertyChangedEventArgs args)
在 System.Windows.FrameworkElement.OnDataContextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
在 System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
在 System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
在 System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
在 System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
在 System.Windows.TreeWalkHelper.OnInheritablePropertyChanged(DependencyObject d, InheritablePropertyChangeInfo info)
在 System.Windows.DescendentsWalker`1._VisitNode(DependencyObject d)
在 System.Windows.DescendentsWalker`1.VisitNode(FrameworkElement fe)
在 System.Windows.DescendentsWalker`1.VisitNode(DependencyObject d)
在 System.Windows.DescendentsWalker`1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
在 System.Windows.DescendentsWalker`1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren)
在 System.Windows.DescendentsWalker`1.IterateChildren(DependencyObject d)
在 System.Windows.DescendentsWalker`1._VisitNode(DependencyObject d)
在 System.Windows.DescendentsWalker`1.VisitNode(FrameworkElement fe)
在 System.Windows.DescendentsWalker`1.VisitNode(DependencyObject d)
在 System.Windows.DescendentsWalker`1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
在 System.Windows.DescendentsWalker`1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren)
在 System.Windows.DescendentsWalker`1.IterateChildren(DependencyObject d)
在 System.Windows.DescendentsWalker`1.StartWalk(DependencyObject startNode, Boolean skipStartNode)
在 System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
在 System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
在 System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
在 System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp)
在 System.Windows.Data.BindingExpressionBase.Invalidate(Boolean isASubPropertyChange)
在 System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
在 System.Windows.Data.BindingExpression.ScheduleTransfer(Boolean isASubPropertyChange)
在 MS.Internal.Data.ClrBindingWorker.NewValueAvailable(Boolean dependencySourcesChanged, Boolean initialValue, Boolean isASubPropertyChange)
在 MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(Int32 k, ICollectionView collectionView, Object newValue, Boolean isASubPropertyChange)
在 MS.Internal.Data.ClrBindingWorker.OnSourcePropertyChanged(Object o, String propName)
在 MS.Internal.Data.PropertyPathWorker.System.Windows.IWeakEventListener.ReceiveWeakEvent(Type managerType, Object sender, EventArgs e)
在 System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs args, ListenerList list)
在 System.ComponentModel.PropertyChangedEventManager.OnPropertyChanged(Object sender, PropertyChangedEventArgs args)
在 Csla.Xaml.ViewModelBase`1.OnPropertyChanged(String propertyName)
在 MES.Presentation.WPF.Client.MM.Views.BOMViews.BOMsViewModel.set_SelectedItem(BOMItemViewModel value) 位置 E:\MES\MES.Presentation.WPF.Client.MM\Views\BOMViews\BOMsViewModel.cs:行号 53
InnerException:
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