我正在使用
WPF扩展工具包来显示Team对象的属性.现在其中一个属性是人物集合.没问题,我得到一个很好的下拉,当我点击时,向我显示每个人的姓名和年龄.
现在的问题是我实际上并不希望将我的Collection公开为public.但是,只要我将其setter设为私有,就会禁用该属性,以防止用户看到Person集合和人员详细信息：
当它的setter是私有的时候我应该如何显示我的Person Collection？我可以使用XAML模板执行此操作吗？如果是这样的话？我正在使用MVVM,所以我不想在代码中添加任何内容.
更新
好的,所以@tencntraze的解决方案让我大部分都在那里 – 谢谢.
但它对于对象的集合不起作用,这是我在我的情况下得到的.此外,它还可以简化为使用CollectionControlDialog而不是下面实现的自定义ReadOnlyCollectionViewer.
XAML
<UserControl x:Class="DevExpressTreeList.ReadOnlyCollectionEditor"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Name="MyUserControl"
>
<DockPanel>
<Button Click="Button_OnClick" DockPanel.Dock="Right">
<Label Content="˅" Padding="2,2,0" />
</Button>
<Label Name="CollectionLabel" Content="(Collection)" Padding="2,0" />
</DockPanel>
</UserControl>
代码隐藏
public partial class ReadOnlyCollectionEditor : UserControl,ITypeEditor
{
public ReadOnlyCollectionEditor()
{
InitializeComponent();
}
// Use typeof(object) to allow for any Collection<T>
public static readonly DependencyProperty ValueProperty = DependencyProperty.Register(
"Value",typeof(object),typeof(ReadOnlyCollectionEditor),new PropertyMetadata(default(object)));
public object Value
{
// We are now using object so no need to cast
get { return GetValue(ValueProperty); }
set { SetValue(ValueProperty,value); }
}
public FrameworkElement ResolveEditor(Xceed.Wpf.Toolkit.PropertyGrid.PropertyItem propertyItem)
{
var binding = new Binding("Value")
{
Source = propertyItem,Mode = propertyItem.IsReadOnly ? BindingMode.OneWay : BindingMode.TwoWay
};
BindingOperations.SetBinding(this,ValueProperty,binding);
return this;
}
private void Button_OnClick(object sender,RoutedEventArgs e)
{
var collectionControlDialog = new CollectionControlDialog
{
ItemsSource = (IList)this.Value
};
collectionControlDialog.ShowDialog();
}
}
解决方法
我认为你最好的选择是按照
Xceed Documentation实现自己的编辑器.然后你可以提供你想要显示给用户的任何UI,而不需要将值提交回底层对象.请注意,此方法适用于私有setter以及没有任何setter的属性.
ReadOnlyCollectionEditor
XAML
<UserControl x:Class="WpfApplication2.ReadOnlyCollectionEditor"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Name="uc">
<Button Click="Button_OnClick" Height="20" />
</UserControl>
代码隐藏
public partial class ReadOnlyCollectionEditor : UserControl,ITypeEditor
{
public ReadOnlyCollectionEditor()
{
InitializeComponent();
}
public static readonly DependencyProperty ValueProperty = DependencyProperty.Register(
"Value",typeof (IList<string>),typeof (ReadOnlyCollectionEditor),new PropertyMetadata(default(IList<string>)));
public IList<string> Value
{
get { return (IList<string>)GetValue(ValueProperty); }
set { SetValue(ValueProperty,RoutedEventArgs e)
{
ReadOnlyCollectionViewer viewer = new ReadOnlyCollectionViewer {DataContext = this};
viewer.ShowDialog();
}
}
ReadOnlyCollectionViewer
<Window x:Class="WpfApplication2.ReadOnlyCollectionViewer"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="ReadOnlyCollectionViewer" Height="300" Width="300">
<ListBox ItemsSource="{Binding Value}" />
</Window>
示例属性类
public class MyDataObjects
{
public MyDataObjects()
{
this.CollectionProperty = new Collection<string> {"Item 1","Item 2","Item 3"};
this.StringProperty = "Hi!";
}
public string StringProperty { get; set; }
[Editor(typeof(ReadOnlyCollectionEditor),typeof(ReadOnlyCollectionEditor))]
public ICollection<string> CollectionProperty { get; private set; }
}
分配给属性网格
this.propertyGrid.SelectedObject = new MyDataObjects();
结果
编辑
我意识到你想要使用MVVM,我在使用WPF时非常鼓励,但是为了这个示例的目的,我相信保持简单有助于说明这一点,否则它会带来其他问题,如showing a modal dialog from MVVM,所以我只是展示了单击按钮的对话框.
