我有这样的“VM”和“模型”代码,它代表具有 INotifyPropertyChanged 实现的 Product 类:
模型:
public class Product : INotifyPropertyChanged
{
public Product(string name, bool isEnable)
{
Name = name;
IsEnable = isEnable;
}
public string Name { get; set; }
private bool _isEnable;
public bool IsEnable
{
get { return _isEnable; }
set
{
if (value != _isEnable)
{
_isEnable = value;
OnPropertyChanged("IsEnable");
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
视图模型:
public ObservableCollection<Product> Products
{
get { return _products; }
set { _products = value;}
}
private ObservableCollection<Product> _products = new ObservableCollection<Product>()
{
new Product("a", false),
new Product("b", false),
new Product("c", false),
};
并使用 ListBox 查看,其中每个项目都是 RadioButton:
<Window.Resources>
<Style x:Key="RadioButtonListStyle" TargetType="{x:Type ListBox}">
<Setter Property="SelectionMode" Value="Single"></Setter>
<Setter Property="ItemContainerStyle">
<Setter.Value>
<Style TargetType="{x:Type ListBoxItem}" >
<Setter Property="Margin" Value="2" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<RadioButton GroupName="Gr1"
IsChecked="{Binding Path=IsEnable,RelativeSource={RelativeSource TemplatedParent},
UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}">
<ContentPresenter></ContentPresenter>
</RadioButton>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<Grid Margin="5">
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
</Grid.RowDefinitions>
<ListBox x:Name="UserList" Style="{StaticResource RadioButtonListStyle}" ItemsSource="{Binding Products}">
</ListBox>
</Grid>
但是每次单击单选按钮时都没有发生任何事情。在调试模式下,我无法到达 setter 方法中的断点。