如何将 ObservableCollection<T> 绑定到 WrapPanel?

How to bind an ObservableCollection<T> to a WrapPanel?

我正在使用 WPF。我有 ObservableCollectionToggleButton :

private ObservableCollection<ToggleButton> myg = new ObservableCollection<ToggleButton>();

我想将这些 ObservableCollection 控件 (ToggleButtons) 绑定为 WrapPanel 子项。每次我使用 myg.Add(new ToggleButton) 时,我都希望它自动将控件添加到 WrapPanel

示例XAML:

<WrapPanel Name="test1">
    <!-- I want to bind (add) these controls here -->
</WrapPanel>

Is it possible, if yes - how ? Maybe there is other similar way to do that ?

这很容易,但有一个小问题:

要利用 'observable collection' 功能,需要绑定到它,但没有 属性,例如 WrapPanel 上的 ItemsSource

解法:

使用 ItemsControl 并将其面板设置为 WrapPanel 来承载项目。

XAML

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:local="clr-namespace:WpfApplication1"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        Title="MainWindow"
        Width="525"
        Height="350"
        mc:Ignorable="d">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="1*" />
        </Grid.RowDefinitions>
        <Button Grid.Row="0"
                Click="Button_Click"
                Content="Add toggle" />
        <ItemsControl Grid.Row="1" ItemsSource="{Binding}">
            <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate>
                    <WrapPanel IsItemsHost="True" />
                </ItemsPanelTemplate>
            </ItemsControl.ItemsPanel>
        </ItemsControl>
    </Grid>
</Window>

代码

using System.Collections.ObjectModel;
using System.Windows;
using System.Windows.Controls.Primitives;

namespace WpfApplication1
{
    public partial class MainWindow : Window
    {
        private readonly ObservableCollection<ToggleButton> _collection;

        public MainWindow()
        {
            InitializeComponent();

            _collection = new ObservableCollection<ToggleButton>();

            DataContext = _collection;
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            var toggleButton = new ToggleButton
            {
                Content = "Toggle" + _collection.Count
            };
            _collection.Add(toggleButton);
        }
    }
}

注:

将您的 collection 分配给 DataContext 可以让您直接处理 WrapPanel<ItemsControl Grid.Row="1" ItemsSource="{Binding}"> 默认绑定到此 属性。