针对模型验证 ASP.NET MVC2 FormCollection

Question

假设我有一个带有如下验证的用户类设置：

[MetadataType(typeof(ssUserMetaData))]
public partial class ssUser
{

}

class ssUserMetaData
{
    [Required(ErrorMessage = "Name is a required field.")]
    [StringLength(100, ErrorMessage = "Name must be 100 characters or less.")]
    public string Name { get; set; }

    [Required(ErrorMessage = "Username is a required field.")]
    [StringLength(50, ErrorMessage = "Username must be 50 characters or less.")]
    public string Username { get; set; }

    [Required(ErrorMessage = "Email address is a required field.")]
    [Email(ErrorMessage = "Email address must be a valid format.")]
    [StringLength(100, ErrorMessage = "Email address must be 100 characters or less.")]
    [DisplayName("Email address")]
    public string Email { get; set; }

    [Required(ErrorMessage = "Password is a required field.")]
    [StringLength(1000, MinimumLength = 6, ErrorMessage = "Passwords must be at least 6 characters long.")]
    [DisplayName("Password")]
    public string PasswordHash { get; set; }
}

现在，我有一个更新方法，它只允许用户更新几个字段，例如姓名和电子邮件。我不想重新提交此表单的所有数据以通过模型绑定，但我想使用此处配置的验证规则来检查表单集合中的特定值。

类似这个虚构的代码...

bool result = ModelState.ValidateField("Email", formCollection["Email"]);

有没有办法做这样的事情，这样我就可以避免重复我的验证规则？谢谢！

Answer 1

让小型表单使用 NameAndEmail 类，大型表单使用 SsUserMetaData 怎么样？

class NameAndEmail
{
    [Required(ErrorMessage = "Name is a required field.")]
    [StringLength(100, ErrorMessage = "Name must be 100 characters or less.")]
    public string Name { get; set; }


    [Required(ErrorMessage = "Email address is a required field.")]
    [Email(ErrorMessage = "Email address must be a valid format.")]
    [StringLength(100, ErrorMessage = "Email address must be 100 characters or less.")]
    [DisplayName("Email address")]
    public string Email { get; set; }
}
class SsUserMetaData : NameAndEmail
{
    [Required(ErrorMessage = "Username is a required field.")]
    [StringLength(50, ErrorMessage = "Username must be 50 characters or less.")]
    public string Username { get; set; }


    [Required(ErrorMessage = "Password is a required field.")]
    [StringLength(1000, MinimumLength = 6, ErrorMessage = "Passwords must be at least 6 characters long.")]
    [DisplayName("Password")]
    public string PasswordHash { get; set; }
}