如何对 WPF ListView 中的项目进行分组
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How do I group items in a WPF ListView
提问by Russ
I have a ListViewthat I want to group results into, however the examples I am finding are not working. How can I group my results?
我有一个ListView我想将结果分组的，但是我发现的例子不起作用。如何对结果进行分组？
I want to group on the Statusproperty of a custom object.
我想对Status自定义对象的属性进行分组。
This is what I have:
这就是我所拥有的：
<ListView IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding}"
HorizontalContentAlignment="Stretch"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
Background="Transparent" SelectionChanged="ListView_SelectionChanged"
Name="lstShelvedOrders">
<ListView.GroupStyle>
<GroupStyle>
<GroupStyle.HeaderTemplate>
<DataTemplate>
<TextBlock FontWeight="Bold" FontSize="15"
Text="{Binding Path=Status}"/>
</DataTemplate>
</GroupStyle.HeaderTemplate>
</GroupStyle>
</ListView.GroupStyle>
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="BorderThickness" Value="1" />
<Setter Property="Width" Value="Auto" />
<Setter Property="FontSize" Value="10.4" />
</Style>
</ListView.ItemContainerStyle>
<ListView.View>
<GridView>
<GridViewColumn DisplayMemberBinding="{Binding Path=Number}" Header="Shelve ID" />
<GridViewColumn DisplayMemberBinding="{Binding Path=Customer}" Header="Customer" />
<GridViewColumn DisplayMemberBinding="{Binding Path=PurchaseOrderNo}" Header="PO Number" />
<GridViewColumn DisplayMemberBinding="{Binding Path=SubmittedBy}" Header="Shelved By" />
<GridViewColumn DisplayMemberBinding="{Binding Path=OrderDate, StringFormat=MMM dd\, yyyy}" Header="Date" />
<GridViewColumn DisplayMemberBinding="{Binding Path=CustomerTerms.Description}" Header="Order Terms" />
<GridViewColumn DisplayMemberBinding="{Binding Path=ShippingMethod.Description}" Header="Shipping" />
<GridViewColumn DisplayMemberBinding="{Binding Path=TotalPrice, StringFormat=c}" Header="Order Total" />
</GridView>
</ListView.View>
</ListView>
And this is the code that I have:
这是我拥有的代码：
void ShelvedOrderList_DataContextChanged(object sender, System.Windows.DependencyPropertyChangedEventArgs e)
{
AddGrouping();
}
private void AddGrouping()
{
if ( lstShelvedOrders.ItemsSource == null)
{
return;
}
CollectionView myView = (CollectionView)CollectionViewSource.GetDefaultView(lstShelvedOrders.ItemsSource);
PropertyGroupDescription groupDescription = new PropertyGroupDescription("Status");
myView.GroupDescriptions.Add(groupDescription);
}
采纳答案by Robert Macnee
I notice one thing right away - the GroupStyle.HeaderTemplatewill be applied to a CollectionViewGroup,so your DataTemplateshould probably look like this:
我马上注意到一件事 -GroupStyle.HeaderTemplate将应用于 a CollectionViewGroup，所以你DataTemplate应该看起来像这样：
<GroupStyle>
<GroupStyle.HeaderTemplate>
<DataTemplate>
<TextBlock FontSize="15" FontWeight="Bold" Text="{Binding Name}"/>
</DataTemplate>
</GroupStyle.HeaderTemplate>
</GroupStyle>
CollectionViewGroup.Namewill be assigned the value of Statusfor that group.
CollectionViewGroup.Name将Status为该组分配 的值。
回答by MAXE
I think this can also be better, using a GroupStyle with a new ControlTemplate:
我认为这也可以更好，使用带有新 ControlTemplate 的 GroupStyle：
<ListView ItemsSource="{Binding Path=ContactsView}">
<ListView.GroupStyle>
<GroupStyle>
<GroupStyle.ContainerStyle>
<Style TargetType="{x:Type GroupItem}">
<Setter Property="Template" Value="{StaticResource ContactsGroupItemTemplate}" />
</Style>
</GroupStyle.ContainerStyle>
</GroupStyle>
</ListView.GroupStyle>
...
...
<ControlTemplate TargetType="{x:Type GroupItem}" x:Key="ContactsGroupItemTemplate">
<Expander IsExpanded="False">
<Expander.Header>
<DockPanel>
<TextBlock FontWeight="Bold" Text="{Binding Path=Name}" Margin="5,0,0,0" Width="100"/>
<TextBlock FontWeight="Bold" Text="{Binding Path=ItemCount}"/>
<TextBlock FontWeight="Bold" Text=" Items"/>
</DockPanel>
</Expander.Header>
<Expander.Content>
<ItemsPresenter />
</Expander.Content>
</Expander>
</ControlTemplate>
