我正在构建一个应用程序,向用户显示系列比赛的实时结果。我设置数据结构如下:Countries->Leagues->Matches
特别是在 ViewModel 中,我创建了一个可观察的国家/地区集合,如下所示:
private ObservableCollection<Models.Country> _countries = new ObservableCollection<Models.Country>();
public ObservableCollection<Models.Country> Country
{
get { return _countries; }
}
和型号:
public class Country
{
public string Name { get; set; }
public List<League> League { get; set; }
}
public class League
{
public string Name { get; set; }
public List<Event> Event { get; set; }
}
Event 类包含每个事件的属性,特别是事件的名称、日期等。
我对这些数据的估值如下:
Country country = new Country();
country.Name = "Italy";
League league = new League();
league.Name = "Serie A";
League league2 = new League();
league2.Name = "Serie B";
Event @event = new Event();
@event.MatchHome = "Inter";
Event event2 = new Event();
@event.MatchHome = "Milan";
league.Event = new List<Event>();
league2.Event = new List<Event>();
league.Event.Add(@event);
league2.Event.Add(event2);
country.League = new List<League>();
country.League.Add(league);
country.League.Add(league2);
lsVm.Country.Add(country); //lsVm contains the ViewModel
你如何看到我创建了一个名为country
(意大利)在这种情况下将包含两个联赛(意甲)和(意乙)。每个联赛包含一场实际进行的比赛Serie A -> Inter
and Serie B -> Milan
我将联赛二添加到国家/地区,最后将国家/地区添加到视图模型中的可观察集合中。到这里为止都没有问题。问题出在 xaml 中。
因此,我将所有这些内容组织在 GroupViews 中,为此我使用 CollectionViewSource,特别是:
<CollectionViewSource Source="{Binding Country}" x:Key="GroupedItems">
<CollectionViewSource.GroupDescriptions>
<PropertyGroupDescription PropertyName="Name" />
<PropertyGroupDescription PropertyName="League.Name" />
</CollectionViewSource.GroupDescriptions>
上面的代码位于我的 Window.Resources 中,并告诉 CollectionViewSource 组织相关联赛的国家/地区名称和联赛名称。
我有两个 ListView,如下所示:
<ListView ItemsSource="{Binding Source={StaticResource GroupedItems}}" Name="Playing">
<ListView.View>
<GridView>
<GridViewColumn Header="Date" Width="150" DisplayMemberBinding="{Binding Path = League.Event.MatchDate}"/>
<GridViewColumn Header="Minutes" Width="70" DisplayMemberBinding="{Binding Path = League.Event.MatchMinute}"/>
<GridViewColumn Header="Home" Width="150" DisplayMemberBinding="{Binding Path = League.Event.MatchHome}"/>
<GridViewColumn Header="Score" Width="100" DisplayMemberBinding="{Binding Path = League.Event.MatchScore}"/>
<GridViewColumn Header="Away" Width="150" DisplayMemberBinding="{Binding Path = League.Event.MatchAway}"/>
</GridView>
</ListView.View>
<GroupStyle>
<GroupStyle.ContainerStyle>
<Style TargetType="{x:Type GroupItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Expander IsExpanded="True" Background="#4F4F4F" >
<Expander.Header>
<StackPanel Orientation="Horizontal" Height="22">
<TextBlock Text="{Binding Name}" FontWeight="Bold" Foreground="White" FontSize="22" VerticalAlignment="Bottom" />
<TextBlock Text="{Binding ItemCount}" FontSize="22" Foreground="Orange" FontWeight="Bold" FontStyle="Italic" Margin="10,0,0,0" VerticalAlignment="Bottom" />
<TextBlock Text=" Leagues" FontSize="22" Foreground="White" FontStyle="Italic" VerticalAlignment="Bottom" />
</StackPanel>
</Expander.Header>
<ItemsPresenter />
</Expander>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</GroupStyle.ContainerStyle>
</GroupStyle>
GroupStyle 包含将包含每场比赛的联赛,现在的问题是我看不到任何联赛和任何比赛,因为该项目位于列表内。因此,为了显示它们,我应该在 xaml 中编写以下代码:
<PropertyGroupDescription PropertyName="League[0].Name" />
修复了GroupStyle中联赛名称显示的bug
在 GridView 中:
<GridViewColumn Header="Casa" Width="150" DisplayMemberBinding="{Binding Path = League[0].Event[0].MatchHome}"/>
但这当然只会显示特定的项目..而不是项目列表。我需要帮助来解决这种情况,我无法弄清楚。谢谢。