asp.net-mvc – 数据模型需要两个属性之一

[AttributeUsage(AttributeTargets.Property,AllowMultiple =false,Inherited = false)]
  public class ValidatePersonName: ValidationAttribute
  {
    protected override ValidationResult IsValid(object value,ValidationContext validationContext)
    {
      string FirstName = (string)validationContext.ObjectType.GetProperty("FirstName").GetValue(validationContext.ObjectInstance,null);

      string LastName = (string)validationContext.ObjectType.GetProperty("LastName").GetValue(validationContext.ObjectInstance,null);

  //check at least one has a value
  if (string.IsNullOrEmpty(FirstName) && string.IsNullOrEmpty(LastName))
        return new ValidationResult("At least one is required!!");

      return ValidationResult.Success;
    }
  }

用法：

class Person{

 [ValidatePersonName]
 FirstName{get;set;}

 LastName{get;set;}
}