C# 使用ItemsControl中TextBlock的值筛选列表框中的集合

我已经创建了自己的日历。我的日历中的每一天都有一个itemsControl，其中包含一个textblock和一个listbox，它应该包含每个日期的项目

如何使用ItemsControl中绑定的textblock中的字符串值筛选集合？ textblock与Day类的date属性绑定

视图模型

 public ObservableCollection<Day> Days { get; set; }

 public ObservableCollection<Scene> SceneList;

 private ListCollectionView _sceneCollection;
 public ListCollectionView SceneCollection
 {
     get
     {
         if (_sceneCollection == null) //important for loading the app
         {
             _sceneCollection = new ListCollectionView(this.SceneList);
             _sceneCollection.IsLiveFiltering = true;
             _sceneCollection.Filter = o =>
             {
                 var Scene = o as Scene;
                 return Scene != null && Scene.Date == ////string of binded TextBlock//;
             };
         }
         return _sceneCollection;
     }
     set
     {
         _sceneCollection = value; RaisePropertyChanged();
     }
 }

Xaml

---

首先，列表框的

ItemsSource

绑定将不起作用，因为它的DataContext是Day对象，并且

SceneCollection

属性不在那里，而是在ViewModel中

此外，您不应该在ViewModel中过滤集合，因为所有项目都将绑定到它，并且它们需要不同的过滤器

在你的例子中，如果你想使用过滤器和集合视图，同时保持底层集合的完整性，我只需在你的“Day”类中添加一个“ICollectionView”属性，然后每天为你的SceneCollection分配一个过滤视图

型号：

public class Day : INotifyPropertyChanged
{
    private DateTime date;
    public DateTime Date
    {
        get { return date; }
        set
        {
            date = value;
            if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("Date"));
        }
    }

    private ICollectionView scenes;
    public ICollectionView Scenes
    {
        get { return scenes; }
        set
        {
            scenes = value;
            if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("Scenes"));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
}

ViewModel（示例），在天集合初始化中：

private IEnumerable<Day> CreateDaysData()
{
    var maxDays = DateTime.DaysInMonth(DateTime.Now.Year, DateTime.Now.Month);

    for (int d = 1; d <= maxDays; d++)
    {
        var day = new Day
        {
            Date = new DateTime(DateTime.Now.Year, DateTime.Now.Month, d)
        };

        var viewSource = new CollectionViewSource
        {
            Source = ScenesCollection
        };

        viewSource.Filter += new FilterEventHandler((o, e) =>
        {
            e.Accepted = (e.Item as Scene).Date == day.Date;
        });

        day.Scenes = viewSource.View;

        yield return day;
    }
}

private IEnumerable CreateDaysData（）
{
var maxDays=DateTime.DaysInMonth（DateTime.Now.Year，DateTime.Now.Month）；
对于（int d=1；d
{
e、 已接受=（即项目作为场景）。日期==天。日期；
});
day.Scenes=viewSource.View；
收益率回归日；
}
}

最后，您的XAML将以如下方式结束：

<ItemsControl ItemsSource="{Binding Days}">         
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <UniformGrid Rows="6" Columns="7">                     
            </UniformGrid>                  
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>

    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <StackPanel>
                <TextBlock Text="{Binding Date , Converter={StaticResource DateConverter}, ConverterParameter=DAY}"/>               
                <!-- The ListBox's ItemsSource is bound to the ICollectionView of your Day class -->        
                <ListBox  ItemsSource="{Binding Scenes}" dd:DragDrop.IsDragSource="True"
 dd:DragDrop.IsDropTarget="True" Height="100">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel>
                            <TextBlock>
                                 <Run Text="{Binding Path=SceneNumber}"/>
                                 <Run Text="{Binding Path=SlugLine}"/>
                            </TextBlock>
                        </StackPanel>
                    </DataTemplate>
                </ListBox.ItemTemplate>
               </ListBox>
            </StackPanel>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

private IEnumerable<Day> CreateDaysData()
{
    var maxDays = DateTime.DaysInMonth(DateTime.Now.Year, DateTime.Now.Month);

    for (int d = 1; d <= maxDays; d++)
    {
        var day = new Day
        {
            Date = new DateTime(DateTime.Now.Year, DateTime.Now.Month, d)
        };

        var viewSource = new CollectionViewSource
        {
            Source = ScenesCollection
        };

        viewSource.Filter += new FilterEventHandler((o, e) =>
        {
            e.Accepted = (e.Item as Scene).Date == day.Date;
        });

        day.Scenes = viewSource.View;

        yield return day;
    }
}

<ItemsControl ItemsSource="{Binding Days}">         
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <UniformGrid Rows="6" Columns="7">                     
            </UniformGrid>                  
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>

    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <StackPanel>
                <TextBlock Text="{Binding Date , Converter={StaticResource DateConverter}, ConverterParameter=DAY}"/>               
                <!-- The ListBox's ItemsSource is bound to the ICollectionView of your Day class -->        
                <ListBox  ItemsSource="{Binding Scenes}" dd:DragDrop.IsDragSource="True"
 dd:DragDrop.IsDropTarget="True" Height="100">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel>
                            <TextBlock>
                                 <Run Text="{Binding Path=SceneNumber}"/>
                                 <Run Text="{Binding Path=SlugLine}"/>
                            </TextBlock>
                        </StackPanel>
                    </DataTemplate>
                </ListBox.ItemTemplate>
               </ListBox>
            </StackPanel>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>