数据注释模型绑定器的意图

Question

文章此处提到了使用此处提供了数据注释模型绑定器。

有谁知道它的意图是什么？要进行 DA 验证，我不需要 MVC 2.0 中的特殊模型绑定器

Answer 1

ASP.Net MVC 的第一个版本不支持通过数据注释作为框架的一部分进行验证。链接的 Codeplex 代码的目的是专门允许使用面向属性的验证（需求量很大）作为第二个版本中实现的解决方案的权宜之计。

Answer 2

DataType

Specify the datatype of a property
DisplayName

specify the display name for a property.
DisplayFormat

specify the display format for a property like different format for Date proerty.
Required

Specify a property as required.
ReqularExpression

validate the value of a property by specified regular expression pattern.
Range

validate the value of a property with in a specified range of values.
StringLength

specify min and max length for a string property.
MaxLength

specify max length for a string property.
Bind

specify fields to include or exclude when adding parameter or form values to model properties.
ScaffoldColumn

指定从编辑器表单中隐藏的字段。

using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Web.Mvc;
namespace Employee.Models
{
[Bind(Exclude = "EmpId")]
public class Employee
{
[ScaffoldColumn(false)]
public int EmpId { get; set; }
[DisplayName("Employee Name")]
[Required(ErrorMessage = "Employee Name is required")]
[StringLength(100,MinimumLength=3)]
public String EmpName { get; set; }
[Required(ErrorMessage = "Employee Address is required")]
[StringLength(300)]
public string Address { get; set; }
[Required(ErrorMessage = "Salary is required")]
[Range(3000, 10000000,ErrorMessage = "Salary must be between 3000 and 10000000")]
public int Salary{ get; set; }
[Required(ErrorMessage = "Please enter your email address")]
[DataType(DataType.EmailAddress)]
[Display(Name = "Email address")]
[MaxLength(50)]
[RegularExpression(@"[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}", ErrorMessage = "Please enter correct email")]
public string Email { get; set; }
}
}