Question

我有多个位于Grid中的列表框。每个列表框由GridSplitter分隔。

每个ListBoxItem都有一个显示多行数据的datatemplate。我想要的是，当列表框调整大小时（通过GridSplitter），ListBoxItem DataTemplate可以相应地更新（显示不同级别的细节，例如当大小小于数字时，我将隐藏一些内容）。

我现在正在ListBox上监听SizeChanged，然后在我的自定义ListBox上设置一个属性，DataTemplate中的控件将绑定到要显示或隐藏的属性。

例如，我的ListBox上有一个属性）

 MediumSize = (ActualWidth > 200 && ActualWidth < 400);

在我的Xaml中，某些控件的Visibility将绑定到此属性。

有效。但这很愚蠢，因为显然我只能使用一个“大小”级别。

还有更好的方法吗？

谢谢

Answer 1

Blam说试试这个，使用valueconverter

<Window.Resources>
        <local:HeightToTemplateConverter x:Key="HeightToTemplateConverter"/>
        <DataTemplate x:Key="three">
            <StackPanel>
                <TextBlock Text="{Binding FName}"/>
                <TextBlock Text="{Binding SName}"/>
                <TextBlock Text="{Binding Age}"/>
            </StackPanel>
        </DataTemplate>
        <DataTemplate x:Key="two">
            <StackPanel >
                <TextBlock Text="{Binding FName}"/>
                <TextBlock Text="{Binding SName}"/>
            </StackPanel>
        </DataTemplate>
        <DataTemplate x:Key="one">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding FName}"/>
                <TextBlock Text="{Binding SName}"/>
            </StackPanel>
        </DataTemplate>
    </Window.Resources>
    <Grid Height="300" Width="500">
        <Grid.RowDefinitions>
            <RowDefinition  />
            <RowDefinition Height="Auto" />
            <RowDefinition  />
        </Grid.RowDefinitions>

            <ListBox Grid.Row="0" ItemTemplate="{Binding ActualHeight, RelativeSource={RelativeSource Mode=Self}, Converter={StaticResource HeightToTemplateConverter}, UpdateSourceTrigger=PropertyChanged}" ItemsSource="{Binding MyColl}" />

        <GridSplitter Grid.Row="1" Height="5" ResizeDirection="Rows" Background="Red" VerticalAlignment="Center" HorizontalAlignment="Stretch" />
        <ListBox ItemTemplate="{Binding ActualHeight, RelativeSource={RelativeSource Mode=Self}, Converter={StaticResource HeightToTemplateConverter}, UpdateSourceTrigger=PropertyChanged}" Grid.Row="2" ItemsSource="{Binding MyColl}" />
    </Grid>

代码背后的代码：

public partial class MainWindow : Window
    {

        public MainWindow()
        {
            InitializeComponent();
            this.DataContext = new ViewModel();
        }
    }
    public class Model
    {
        private string fname;

        public string FName
        {
            get { return fname; }
            set { fname = value; }
        }
        private string sname;

        public string SName
        {
            get { return sname; }
            set { sname = value; }
        }
        private int age;

        public int Age
        {
            get { return age; }
            set { age = value; }
        }


    }
    public class ViewModel
    {
        private ObservableCollection<Model> mycoll;

        public ObservableCollection<Model> MyColl
        {
            get { return mycoll; }
            set { mycoll = value; }
        }
        public ViewModel()
        {
            MyColl = new ObservableCollection<Model>();
            MyColl.Add(new Model { FName = "Muthu", SName = "Kumar", Age = 23 });
            MyColl.Add(new Model { FName = "Muthu", SName = "Kumar", Age = 23 });
            MyColl.Add(new Model { FName = "Muthu", SName = "Kumar", Age = 23 }); MyColl.Add(new Model { FName = "Muthu", SName = "Kumar", Age = 23 });
            MyColl.Add(new Model { FName = "Muthu", SName = "Kumar", Age = 23 });
            MyColl.Add(new Model { FName = "Muthu", SName = "Kumar", Age = 23 });
        }
    }

    public class HeightToTemplateConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (Double.Parse(value.ToString()) >= 100)
                return App.Current.MainWindow.Resources["three"] as DataTemplate;
            if (Double.Parse(value.ToString()) <= 100 && Double.Parse(value.ToString()) >= 60)
                return App.Current.MainWindow.Resources["two"] as DataTemplate;
             if (Double.Parse(value.ToString()) < 60)
                return App.Current.MainWindow.Resources["one"] as DataTemplate;
            return null;
        }


        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

这只是一个试用版，让我知道它是否有帮助。

由于库马尔

有没有办法可以通过父母的尺寸变化来触发房产变更？

1 个答案: