什么是将类似edmx中的自引用表绑定到WPF TreeView控件的最佳解决方案,以获得如下结果:
数据绑定转换器(Binding Converter)
解决了这个问题: public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var item = value as MyTable;
return item.MyTable1.Where(i => i.parent_id== item.id); //return children
}
.xaml :
<TreeView Name="treeview1" ItemsSource="{Binding Converter={StaticResource HierarchyConverter}}" ItemTemplate="{StaticResource ItemTemplate}" >
<TreeView.Resources>
<local:HierarchyConverter x:Key="HierarchyConverter" />
<HierarchicalDataTemplate x:Key="ItemTemplate" ItemsSource="{Binding Converter={StaticResource HierarchyConverter}}">
<TextBlock Text="{Binding element_name}" />
</HierarchicalDataTemplate>
</TreeView.Resources>
</TreeView>
.cs :
treeview1.ItemsSource = db.MyTable.Where(x => x.partnt_id== null);//elements that have no parent
TreeView
可以绑定。您不能仅使用EF,因为EF不支持递归。