我正在尝试对Collection ViewSource进行一种基本的使用,我肯定遗漏了一些东西,因为它不起作用。以下是我的XAML:
<Window.Resources>
<CollectionViewSource Source="{Binding loc:MainVM.Instance.MapItems}" x:Key="MapCV">
<CollectionViewSource.GroupDescriptions>
<PropertyGroupDescription PropertyName="SourceProject" />
</CollectionViewSource.GroupDescriptions>
</CollectionViewSource>
</Window.Resources>
<ListBox ItemsSource="{StaticResource MapCV}" HorizontalContentAlignment="Stretch" ScrollViewer.HorizontalScrollBarVisibility="Disabled">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid HorizontalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="2*"/>
<ColumnDefinition Width="2*"/>
<ColumnDefinition Width="50"/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="{Binding SourceType, Converter={StaticResource WorkItemTypeToStringConverter}}"/>
<ComboBox Grid.Column="1" SelectedItem="{Binding DestType}" ItemsSource="{Binding WorkItemTypesForCurrentDestProject, Source={x:Static loc:MainMediator.Instance}, diagnostics:PresentationTraceSources.TraceLevel=High}" DisplayMemberPath="Name" />
<Button Grid.Column="2" Content="{Binding PercentMapped}"/>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
这编译得很好,但当我运行该应用程序时,我会得到以下错误:
Cannot convert the value in attribute 'ItemsSource' to object of type
'System.Collections.IEnumerable'. 'System.Windows.Data.CollectionViewSource'
is not a valid value for property 'ItemsSource'. Error at object
'System.Windows.Controls.ListBox' in markup file 'WIAssistant;component/main.xaml
这是我附加到的收藏:
// The mappings used to copy the values of the fields of one WorkItem to another.
public ObservableCollection<WorkItemTypeMapping> WorkItemTypeMappings
{
get { return (ObservableCollection<WorkItemTypeMapping>)
GetValue(WorkItemTypeMappingsProperty); }
set { SetValue(WorkItemTypeMappingsProperty, value); }
}
public static readonly DependencyProperty WorkItemTypeMappingsProperty =
DependencyProperty.Register("WorkItemTypeMappings",
typeof(ObservableCollection<WorkItemTypeMapping>), typeof(MainMediator),
new UIPropertyMetadata(null));
我只想对对象进行简单的分组Project SourceProject
我不想为了这个而冲出一片树景。
发布于 2018-04-10 17:36:58
这应该对你有用
<ListBox ItemsSource="{Binding Source={StaticResource MapCV}}" ...
https://stackoverflow.com/questions/-100008047
复制相似问题