如何对 WPF ListView 中的项目进行分组 [英] How do I group items in a WPF ListView

问题描述

我有一个 ListView，我想将结果分组到其中，但是我发现的示例不起作用.如何对结果进行分组?

I have a ListView that I want to group results into, however the examples I am finding are not working. How can I group my results?

我想对自定义对象的 Status 属性进行分组.

I want to group on the Status property of a custom object.

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>

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);
 }

推荐答案

我马上注意到一件事 - GroupStyle.HeaderTemplate 将应用于 CollectionViewGroup, 所以你的 DataTemplate 应该是这样的:

I notice one thing right away - the GroupStyle.HeaderTemplate will be applied to a CollectionViewGroup, so your DataTemplate should probably look like this:

<GroupStyle>
    <GroupStyle.HeaderTemplate>
        <DataTemplate>
            <TextBlock FontSize="15" FontWeight="Bold" Text="{Binding Name}"/>
        </DataTemplate>
    </GroupStyle.HeaderTemplate>
</GroupStyle>

CollectionViewGroup.Name 将为该组分配 Status 的值.

CollectionViewGroup.Name will be assigned the value of Status for that group.

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