如何使用HierarchicalDataTemplate为EntityCollection对象对WPF TreeView进行排序？
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我的网页是一个实体框架实体。这些绑定到WPF TreeView。我想排序Sort属性上TreeView中显示的所有网页。
码
EDMX
其“下属”属性返回零个或多个网页的集合。
XAML
<TreeView Name=\"TreeViewWebpages\">
<TreeView.Resources>
<HierarchicalDataTemplate DataType=\"{x:Type local:Webpage}\"
ItemsSource=\"{Binding Subordinates}\">
<TextBlock Text=\"{Binding Path=Title}\" />
</HierarchicalDataTemplate>
</TreeView.Resources>
</TreeView>
TreeViewWebpages.ItemsSource = from Webpage root in db.Webpages.Include(\"Subordinates\")
where root.Dominant == null
select root;
ItemsSource=\"{Binding Path=Subordinates, Converter={local:SortConverter}}\"
[ValueConversion(typeof(EntityCollection<Webpage>), typeof(EntityCollection<Webpage>))]
public class SortConverter : MarkupExtension, IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return ((EntityCollection<Webpage>)value).OrderBy(o => o.Sort);
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return null;
}
public override object ProvideValue(IServiceProvider serviceProvider)
{
return this;
}
}
没有找到相关结果
已邀请:
1 个回复
凰葱崎济邯
TreeViewWebpages.ItemsSource = from Webpage root in db.Webpages.Include(\"Subordinates\") where root.Dominant == null orderby root.Sort select root;