ASP.NET MVC自定义Numberic属性的验证信息

     最近在使用MVC4时碰到一个Model验证的问题：整型属性输入非整型字符串时，错误信息总是“字段 XXX 必须是一个数字”，我总觉得这句话读起来很别扭，所以就萌生了要改变这个默认错误提示信息的念头，但我试了还能多办法都没成功，最后在Artech大牛的文章中找到了答案：http://www.cnblogs.com/artech/archive/2012/02/13/NumericPropertyValidation.html

 

    下面简单整理一下处理过程：

 1.自定义数值验证属性 NumericAttribute
    internal class NumericAttribute : ValidationAttribute, IClientValidatable
    {
        public override bool IsValid(object value)
        {
            return true;
        }
        public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
        {
            yield return new ModelClientValidationRule { ValidationType = "number", ErrorMessage = this.FormatErrorMessage(metadata.DisplayName)};
        }
    }

2. 自定义ModelValidatorProvider
    将ClientDataTypeModelValidatorProvider提供的NumericModelValidator替换成基于NumericAttribute的DataAnnotationsModelValidator
        public class FilterableClientDataTypeModelValidatorProvider : ClientDataTypeModelValidatorProvider
    {
        public override IEnumerable<ModelValidator> GetValidators(ModelMetadata metadata, ControllerContext context)
        {          
            var allValidators = base.GetValidators(metadata, context);
            var validators = new List<ModelValidator>();
            foreach (var v in allValidators)
            {
                if (v.GetType().Name != "NumericModelValidator")
                {
                    validators.Add(v);
                }
                else
                {
                    NumericAttribute attribute = new NumericAttribute{ ErrorMessage = Resources.FieldMustBeNumeric};
                    DataAnnotationsModelValidator validator = new DataAnnotationsModelValidator(metadata, context, attribute);
                    validators.Add(validator);
                }
            }
            return validators;
        }
    }

 

3.注册自定义的ModelValidatorProvider           

　　protected void Application_Start()        

　　{            

　　　　AreaRegistration.RegisterAllAreas();

            RegisterGlobalFilters(GlobalFilters.Filters);            

　　　　RegisterRoutes(RouteTable.Routes);

            var clientDataTypeValidator = ModelValidatorProviders.Providers.OfType<ClientDataTypeModelValidatorProvider>().FirstOrDefault();             if (null != clientDataTypeValidator)            

　　　　{                

　　　　 　　ModelValidatorProviders.Providers.Remove(clientDataTypeValidator);            

　　　　}            

　　　　ModelValidatorProviders.Providers.Add(new FilterableClientDataTypeModelValidatorProvider());        　　

　　 }

4.补充说明
    必须要引用jquery.validate.min.js和jquery.validate.unobtrusive.min.js文件