使用Data Annotations进行手动验证

DataAnnotations在ASP.NET MVC中非常好用，但是其他时候，比如控制台程序，我们怎么来使用它呢，直接上代码，一个超简单的类：

C#

public class Customer { [Required] public string Name { get; set; } [Required] public string Phone { get; set; } [Required] public string Email { get; set; } }

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public class Customer {     [Required]     public string Name { get; set; }       [Required]     public string Phone { get; set; }       [Required]     public string Email { get; set; } }

下面是验证的代码：

C#

var cust = new Customer(); var context = new ValidationContext(cust, serviceProvider: null, items: null); var results = new List<ValidationResult>(); var isValid = Validator.TryValidateObject(cust, context, results); if (!isValid) { foreach (var validationResult in results) { Console.WriteLine(validationResult.ErrorMessage); } }

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var cust = new Customer(); var context = new ValidationContext(cust, serviceProvider: null, items: null); var results = new List<ValidationResult>();   var isValid = Validator.TryValidateObject(cust, context, results);   if (!isValid) {     foreach (var validationResult in results)     {         Console.WriteLine(validationResult.ErrorMessage);     } }

实现IValidatableObject，也可以：

C#

public class Customer : IValidatableObject { [Required] public string Name { get; set; } [Required] public string Phone { get; set; } [Required] public string Email { get; set; } public IEnumerable<ValidationResult> Validate(ValidationContext validationContext) { ... } }

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public class Customer : IValidatableObject     {         [Required]         public string Name { get; set; }           [Required]         public string Phone { get; set; }           [Required]         public string Email { get; set; }           public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)         {             ...         }     }