[英]RadioButton ValidationRule when no option is selected
我试图弄清楚如何为radiobutton
创建验证规则。 我试图实现的是用户必须通过单选按钮选择一个选项。
我的ViewModel具有一个基于Enum
的属性:
public enum Gender
{
Unknown,
Male,
Female
}
[ImplementPropertyChanged]
public class MyViewModel
{
public Gender Gender { get; set; }
public MyViewModel()
{
Gender = Gender.Unknown;
}
}
<StackPanel Orientation="Horizontal">
<RadioButton Content="Male" IsChecked="{Binding Gender, ConverterParameter={x:Static data:Gender.Male}, Converter={StaticResource EnumToBooleanConverter}}"/>
<RadioButton Content="Female" IsChecked="{Binding Gender, ConverterParameter={x:Static data:Gender.Female}, Converter={StaticResource EnumToBooleanConverter}}"/>
</StackPanel>
我的复选框有一个“错误”样式(红色边框,字体颜色等)
当“ Gender
仍设置为“ Unknown
时,应该如何为每个单选按钮触发ValidationRule? (所以都显示出我的错误风格)
我有它的工作,不是与ValidationRule
而是与IDataErrorInfo
。
[ImplementPropertyChanged]
public class MyViewModel : IDataErrorInfo
{
public Gender Gender { get; set; }
public MyViewModel()
{
Gender = Gender.Unknown;
}
public string this[string name]
{
get
{
if (name == "Gender" && Gender == Gender.Unknown)
{
return "Gender need to be known";
}
return null;
}
}
public string Error
{
get
{
return null;
}
}
}
<StackPanel Orientation="Horizontal">
<RadioButton Content="Male" IsChecked="{Binding Gender, ConverterParameter={x:Static data:Gender.Male}, Converter={StaticResource EnumToBooleanConverter}, NotifyOnSourceUpdated=True, ValidatesOnDataErrors=True}"/>
<RadioButton Content="Female" IsChecked="{Binding Gender, ConverterParameter={x:Static data:Gender.Female}, Converter={StaticResource EnumToBooleanConverter}, NotifyOnSourceUpdated=True, ValidatesOnDataErrors=True}"/>
</StackPanel>
摘要:
IDataErrorInfo
NotifyOnSourceUpdated=True, ValidatesOnDataErrors=True
到RadioButtons
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