Question

我正在努力解决这个问题？在我的VM中，我有一个nullable bool属性，我想绑定到是/否（ true / false ）RadRadioButton。有人能指出我正确的方向吗？

VM

public bool? IsSDS { get; set; }

查看

<telerik:Label Content="Self Directed Support" />
<StackPanel Orientation="Horizontal">
     <telerik:RadRadioButton x:Name="SelfDirectedSupportYes" Content="Yes" />
     <telerik:RadRadioButton x:Name="SelfDirectedSupportNo" Content="No" />
</StackPanel>

修改

我认为这是有效的，但我错了。只有是具有约束力。以下是我的观看内容CreateAuthView：

<StackPanel Orientation="Horizontal" Margin="3" Grid.Column="1" Grid.Row="2">
   <telerik:RadRadioButton x:Name="Authorization_SelfDirectedSupportYes" GroupName="SDS" Content="Yes" />
    <telerik:RadRadioButton x:Name="Authorization_SelfDirectedSupportNo" GroupName="SDS" Content="No" />
</StackPanel>

，这是我的ViewModel上的相应部分，CreateAuthViewModel：

public Authorization Authorization
{
    get
    {
       return this.authorization;
    }
    set
    {
       if (authorization != value)
       {
          this.authorization = value;
          NotifyOfPropertyChange(() => Authorization);                    
       }
    }
}

最后我的模型上的属性Authorization：

public bool? SelfDirectedSupportYes
{
   get
   {
      return this.selfDirectedIndicator;
   }
   set
   {
      this.selfDirectedIndicator = value;
      this.OnPropertyChanged();
   }
}

Answer 1

IsChecked也是Nullable<bool>类型，因此您可以直接将其绑定到“是”单选按钮。如果为两个单选按钮设置相同的GroupName，则根本不需要绑定“no”单选按钮（因为选中“no”将取消选中“是”）

<telerik:Label Content="Self Directed Support" />
<StackPanel Orientation="Horizontal">
     <telerik:RadRadioButton x:Name="SelfDirectedSupportYes" GroupName="SelfDirectedSupportOption" Content="Yes" IsChecked="{Binding IsSDS}" />
     <telerik:RadRadioButton x:Name="SelfDirectedSupportNo" GroupName="SelfDirectedSupportOption" Content="No" />
</StackPanel>

Answer 2

    <telerik:RadRadioButton x:Name="SelfDirectedSupportYes" IsChecked="{Binding IsSDS}" Content="Yes" />

    <telerik:RadRadioButton x:Name="SelfDirectedSupportNo" IsChecked="{Binding IsSDS, Converter={StaticResource InverseBooleanConverter}}" Content="No" />






    [ValueConversion(typeof(bool), typeof(bool))]
       public class InverseBooleanConverter: IValueConverter
    {
       #region IValueConverter Members

         public object Convert(object value, Type targetType, object parameter,
            System.Globalization.CultureInfo culture)
       {
         if (targetType != typeof(bool))
            throw new InvalidOperationException("The target must be a boolean");

          return !(bool)value;
       }

        public object ConvertBack(object value, Type targetType, object parameter,
           System.Globalization.CultureInfo culture)
       {
           throw new NotSupportedException();
       }

        #endregion
     }

如何将VM中的可空bool绑定到RadRadioButton

2 个答案: