验证的DataAnnotations与Validator类 [英] Validating DataAnnotations with Validator class
问题描述
我想验证一个类装饰着数据标注的<一个href="http://msdn.microsoft.com/en-us/library/system.componentmodel.dataannotations.validator(VS.100).aspx">Validator类。
I'm trying to validate a class decorated with data annotation with the Validator class.
在属性应用于同一类,它工作正常。但是,当我尝试使用元数据类这是行不通的。有什么我应该做的,因此使用元数据类的验证?下面是一些code ..
It works fine when the attributes are applied to the same class. But when I try to use a metadata class it doesn't work. Is there anything I should do with the Validator so it uses the metadata class? Here's some code..
本作品:
public class Persona
{
[Required(AllowEmptyStrings = false, ErrorMessage = "El nombre es obligatorio")]
public string Nombre { get; set; }
[Range(0, int.MaxValue, ErrorMessage="La edad no puede ser negativa")]
public int Edad { get; set; }
}
这不工作:
[MetadataType(typeof(Persona_Validation))]
public class Persona
{
public string Nombre { get; set; }
public int Edad { get; set; }
}
public class Persona_Validation
{
[Required(AllowEmptyStrings = false, ErrorMessage = "El nombre es obligatorio")]
public string Nombre { get; set; }
[Range(0, int.MaxValue, ErrorMessage = "La edad no puede ser negativa")]
public int Edad { get; set; }
}
这是我如何验证实例:
ValidationContext context = new ValidationContext(p, null, null);
List<ValidationResult> results = new List<ValidationResult>();
bool valid = Validator.TryValidateObject(p, context, results, true);
感谢。
推荐答案
我找到了答案在这里:<一href="http://forums.silverlight.net/forums/p/149264/377212.aspx">http://forums.silverlight.net/forums/p/149264/377212.aspx
MVC识别MetaDataType属性,但其他项目则没有。验证之前,您需要手动注册的元数据类:
MVC recognizes the MetaDataType attribute, but other projects do not. Before validating, you need to manually register the metadata class:
TypeDescriptor.AddProviderTransparent(
new AssociatedMetadataTypeTypeDescriptionProvider(typeof(Persona), typeof(Persona_Validation)), typeof(Persona));
ValidationContext context = new ValidationContext(p, null, null);
List<ValidationResult> results = new List<ValidationResult>();
bool valid = Validator.TryValidateObject(p, context, results, true);
这篇关于验证的DataAnnotations与Validator类的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!