我的绑定转换有什么问题？
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我有单选按钮，我想定义单选按钮.isChecked状态和某些堆栈面板的可见性之间的绑定，所以我写了这个convert方法：
public class RadioBtnState2Visible : IValueConverter
{
public object Convert( object value, Type targetType, object parameter, System.Globalization.CultureInfo culture )
{
return ( bool )value == true ? Visibility.Visible : Visibility.Collapsed;
}
public object ConvertBack( object value, Type targetType, object parameter, System.Globalization.CultureInfo culture )
{
return ( Visibility )value == Visibility.Visible ? true : false;
}
}
<local:PageEx.Resources>
<local:RadioBtnState2Visible x:Key=\"Convert\" />
</local:PageEx.Resources>
<RadioButton x:Name=\"MyRadioBtn1\" GroupName=\"group1\" />
<RadioButton x:Name=\"MyRadioBtn2\" GroupName=\"group1\" />
<StackPanel Visibility=\"{Binding ElementName=MyRadioBtn1, Path=IsChecked, Converter={StaticResource Convert}}\" />
没有找到相关结果
已邀请:
3 个回复
荤碗
<UserControl.Resources> <local:RadioBtnState2Visible x:Key=\"Convert\" /> </UserControl.Resources>蜗仓馈
耐扫鹤胶鞭
，而是1 因此，您的代码应为：public class RadioBtnState2Visible : IValueConverter { public object Convert( object value, Type targetType, object parameter, System.Globalization.CultureInfo culture ) { return (value == true) ? Visibility.Visible : Visibility.Collapsed; // the explicit check to true is needed because of case value=null } public object ConvertBack( object value, Type targetType, object parameter, System.Globalization.CultureInfo culture ) { return value == Visibility.Visible ; // yup, it\'s a boolean } }