要么验证,要么验证

时间:2012-03-05 00:25:09

标签: c# asp.net-mvc-3 validation unobtrusive-validation

我想使用ComponentModel DataAnnotations验证两个属性中至少有一个具有值。我的模型看起来像这样:

public class FooModel {
   public string Bar1 { get; set; }
   public int Bar2 { get; set; }
}

基本上,我想验证FooModel,以便需要Bar1 Bar2 。换句话说,你可以输入一个,或另一个,或两者,但你不能把它们都留空。

我希望这对于服务器端和不显眼的客户端验证都有效。


编辑:这可能是possible duplicate, as this looks similar to what I'm looking to do

1 个答案:

答案 0 :(得分:6)

如果要抽取自定义JavaScript进行验证,则需要扩展ValidationAttribute类并覆盖IsValid方法,并实现IClientValidatable。如下所示。

[AttributeUsage(AttributeTargets.Property)]
    public sealed class AtLeastOneOrTwoParamsHasValue : ValidationAttribute, IClientValidatable
    {
        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            var param1 = validationContext.ObjectInstance.GetType().GetProperty("Param1").GetValue(value, null);
            //var param2 = validationContext.ObjectInstance.GetType().GetProperty("Param2").GetValue(value, null);

            //DO Compare logic here.

            if (!string.IsNullOrEmpty(Convert.ToString(param1)))
            {
                return ValidationResult.Success;
            }


            return new ValidationResult("Some Error");
        }

        public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
        {
            //Do custom client side validation hook up

            yield return new ModelClientValidationRule
            {
                ErrorMessage = FormatErrorMessage(metadata.DisplayName),
                ValidationType = "validParam"
            };
        }
    }

用法:

[AtLeastOneOrTwoParamsHasValue(ErrorMessage="Atleast one param must be specified.")]