我如何绑定ControlTemplate中的RadioButton
我正在使用带有controlTemplate的ListBox来显示带有ListBoxItem的RadioButton。 在这里，我想将RadioButton的IsChecked属性设置为true，并为此执行必要的wpf绑定。 下面是xaml
<ListBox ItemsSource="{Binding Products}" DisplayMemberPath="ProductName" Grid.Column="0" Width="250" HorizontalAlignment="Left" Margin="0,2,0,30" AlternationCount="2">
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="Margin" Value="2"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<RadioButton IsChecked="{Binding IsRadioButtonChecked, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}">
<ContentPresenter></ContentPresenter>
</RadioButton>
</ControlTemplate>
</Setter.Value>
</Setter>
<!--Alternate Style Indexing-->
<Style.Triggers>
<Trigger Property="ItemsControl.AlternationIndex" Value="1">
<Setter Property="Background" Value="LightGray"></Setter>
</Trigger>
</Style.Triggers>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
后面的代码是这样的
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
this.DataContext = new ListStylesViewModel();
}
}
ListStyleViewModel类是
public class ListStylesViewModel : INotifyPropertyChanged
{
private string prodName;
private List<Products> products;
private bool isChecked = true;
public ListStylesViewModel()
{
ListStyleModel model = new ListStyleModel();
this.Products = model.GetProducts();
}
public string ProductName
{
get
{
return this.prodName;
}
set
{
this.prodName = value;
this.OnPropertyChanged("ProductName");
}
}
public List<Products> Products
{
get
{
return this.products;
}
set
{
this.products = value;
this.OnPropertyChanged("Products");
}
}
public bool IsRadioButtonChecked
{
get
{
return this.isChecked;
}
set
{
this.isChecked = value;
this.OnPropertyChanged("IsChecked");
}
}
#region
public event PropertyChangedEventHandler PropertyChanged;
private void OnPropertyChanged(string pptName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(pptName));
}
}
#endregion
请告诉我在这里做错了什么？
绑定表达式
IsChecked="{Binding IsRadioButtonChecked,
RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
在ControlTemplate中使用ListBoxItem作为源对象。 但是，ListBoxItem没有IsRadioButtonChecked属性。
由于绑定源属性位于ListBox的DataContext的ListStylesViewModel实例中，因此绑定表达式应如下所示：
IsChecked="{Binding DataContext.IsRadioButtonChecked,
RelativeSource={RelativeSource AncestorType=ListBox}}"