我正在使用WPF。我有ObservableCollection
ToggleButton
:
private ObservableCollection<ToggleButton> myg = new ObservableCollection<ToggleButton>();
我希望将这些ObservableCollection
控件(ToggleButtons
)绑定为WrapPanel
个孩子。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>
是否有可能,如果是 - 怎么样?也许还有其他类似的方法吗?
答案 0 :(得分:6)
这很容易,但有一点点:
要利用'observable collection'功能,需要绑定它,但ItemsSource
上没有WrapPanel
等属性。
<强>解决方案:强>
使用ItemsControl
并将其面板设置为托管项目的WrapPanel
。
<强> XAML 强>
<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>
<强>代码强>
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);
}
}
}
注意:强>
将您的收藏分配给DataContext
会使您无法直接处理WrapPanel
,<ItemsControl Grid.Row="1" ItemsSource="{Binding}">
默认会绑定此属性。