在asp.net mvc 4模型中更改验证触发顺序

Question

这是我的属性OldPassword的模型

 [Required]
 [StringLength(16, ErrorMessage = "The Old Password must be at least 8 characters long.", MinimumLength = 8)]
 [RegularExpression("^(?=.*[a-z])(?=.*[A-Z]).+$", ErrorMessage = "Old Password is Not a valid Password")]
 [Display(Name = "Old Password")]
 public string OldPassword { get; set; }

这是渲染的输出

<input class="inputsmall defaultFocus input-validation-error" data-val="true" 
data-val-length="The Old Password must be at least 8 characters long." 
data-val-length-max="16" data-val-length-min="8" 
data-val-regex="Old Password is Not a valid Password" 
data-val-regex-pattern="^(?=.*[a-z])(?=.*[A-Z]).+$" 
data-val-required="The Old Password field is required." id="OldPassword" maxlength="16" name="OldPassword" style="width: 295px;" type="password">

验证当前的验证顺序是

• 需要
• 正则表达式
• 长度

我想将订单更改为

• 需要
• 长度
• 正则表达式

我用Google搜索了很多,找不到任何直接的解决方案.请帮我解决一下这个.

Answer 1

您可以创建一个继承自DataAnnotationsModelValidatorProvider的自定义类,并覆盖其中的GetValidators方法并将其注册为ModelValidator.在重写方法中,您可以根据需要对验证器进行排序.

public class OrderedAnnotationsModelValidatorProvider : DataAnnotationsModelValidatorProvider
{
    public override IEnumerable<ModelValidator> GetValidators(ModelMetadata metadata, ControllerContext context)
    {
        return base.GetValidators(metadata, context).OrderBy(v => v.SomeProperty).AsEnumerable();
    }
}

要使用OrderedAnnotationsModelValidatorProvider它,您必须将它注册到Global.asax.cs中的ModelValidatorProviders的ModelValidatorProvidersCollection.

ModelValidatorProviders.Providers.Add(new OrderedAnnotationsModelValidatorProvider());