如何在VM中绑定一个可空bool到RadRadioButton

本文关键字：一个 bool RadRadioButton VM 绑定 | 更新日期: 2023-09-27 18:11:48

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。有人能给我指个正确的方向吗?

VM 

public bool? IsSDS { get; set; }
视图

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

编辑

我以为这是工作，但我错了。只有"是"具有约束力。以下是我的看法，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>

，这里是相应的部分在我的ViewModel, CreateAuthViewModel:

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

最后是我的模型的属性，Authorization:

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

如何在VM中绑定一个可空bool到RadRadioButton

IsChecked也是Nullable<bool>类型，因此您可以直接将其绑定为"yes"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"否"单选按钮(因为选中"否"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>

    <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
     }
相关文章：