ASP.NET MVC3数据注释:动态添加验证
ASP.NET MVC3数据注释:动态添加验证
提问于 2011-05-24 18:50:09
我是数据注解的新手。我想知道是否可以(以及如何)动态添加一些验证。它很详细地解释了为什么，但我有一个ViewModel，它在创建时接收和对象。在这个对象中，我必须检查一些属性，根据它的值，我应该有或没有一些验证。
举个例子：
public class ProfileViewModel
{
[Required(ErrorMessage = "The field {0} is required")]
[Display(Name = "Client Code")]
public int ClientCode { get; set; }
[Required(ErrorMessage = "The field {0} is required")]
[StringLength(100, ErrorMessage = "The field {0} must have up to 100 characters.")]
[Display(Name = "Company")]
public string Company { get; set; }
[StringLength(50, ErrorMessage = "The field {0} must have up to 50 characters.")]
[Display(Name = "Name")]
public string Name { get; set; }
[StringLength(50, ErrorMessage = "The field {0} must have up to 50 characters.")]
[Display(Name = "LastName")]
public string LastName { get; set; }
public ProfileViewModel(User usr)
{
if (usuario.ClientCode != null)
{
ClientCode = Convert.ToInt32(usr.ClientCode);
}
else
{
//ClientCode and Company are not yet required.
//Name and LastName are now required.
}
Company = usr.Company;
Name = usr.Name;
LastName = usr.LastName;
}
}回答 2
Stack Overflow用户
回答已采纳
发布于 2011-05-24 20:57:57
我认为实现我想要的最简单的方法就是实现IValidatableObject
public class Product : IValidatableObject
{
public int Prop1 { get; set; }
public int Prop2 { get; set; }
public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
{
if (Prop1 < Prop2)
yield return new ValidationResult("Property 1 can't be less than Property 2");
}
}Stack Overflow用户
发布于 2011-05-24 20:35:33
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/6109277
复制相关文章
相似问题