Question

我试图找出如何为radiobutton创建验证规则。我想要实现的是用户必须通过无线电按钮选择一个选项。

我的ViewModel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>

我有一个＆＃39;错误＆＃39;复选框的样式（红色边框，字体颜色等）

当Gender仍设置为Unknown时，如何为每个单选按钮触发ValidationRule，我该如何实现？（所以都显示我的错误风格）

Answer 1

我已经开始工作，而不是使用ValidationRule但使用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>

<强>要点：

在代码工具IDataErrorInfo
在xaml中将NotifyOnSourceUpdated=True, ValidatesOnDataErrors=True添加到RadioButtons

未选择任何选项时的RadioButton ValidationRule

1 个答案: