DataAnnotations 验证和自定义模型绑定器

发布于 2024-09-03 06:09:36 字数 560 浏览 5 评论 0原文

我有一个接受以下模型的操作方法 - LanguagesViewModel：

public class LanguagesViewModel : ViewModelBase
{
 IEnumerable<LanguageItem> Languages { get; set; }
}

public class LanguageItem
{
 [Required]
 public int LanguageId { get; set; }

 [Required]
 public int SpeakingSkillId { get; set; }

 [Required]
 public int WritingSkillId { get; set; }

 [Required]
 public int UnderstandingSkillId { get; set; } 
}

我还有一个自定义模型绑定器，用于将 POST 数据绑定到 IEnumerable。

问题是如何让 DataAnnotations 验证发挥作用？

原文

I have an action method that accepts the following model - LanguagesViewModel:

public class LanguagesViewModel : ViewModelBase
{
 IEnumerable<LanguageItem> Languages { get; set; }
}

public class LanguageItem
{
 [Required]
 public int LanguageId { get; set; }

 [Required]
 public int SpeakingSkillId { get; set; }

 [Required]
 public int WritingSkillId { get; set; }

 [Required]
 public int UnderstandingSkillId { get; set; } 
}

I also have a custom model binder to bind the POST data to the IEnumerable<LanguageItem>.

The question is how do I get DataAnnotations validation to work?

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莳間冲淡了誓言ζ 2024-09-10 06:09:36

我知道答案很晚了，它是针对 MVC3 的。将以下内容添加到模型绑定器 BindModel 方法的末尾

if (model != null)
{
    System.Web.Mvc.ModelMetadata modelMetadata = ModelMetadataProviders.Current.GetMetadataForType(() => model, model.GetType());
    ModelValidator compositeValidator = ModelValidator.GetModelValidator(modelMetadata, controllerContext);
    foreach (ModelValidationResult result in compositeValidator.Validate(null))
    {                                    
        bindingContext.ModelState.AddModelError(result.MemberName, result.Message);
    }
}

Very late answer I know, and it's for MVC3. Add the following to the end of your model binder BindModel method

if (model != null)
{
    System.Web.Mvc.ModelMetadata modelMetadata = ModelMetadataProviders.Current.GetMetadataForType(() => model, model.GetType());
    ModelValidator compositeValidator = ModelValidator.GetModelValidator(modelMetadata, controllerContext);
    foreach (ModelValidationResult result in compositeValidator.Validate(null))
    {                                    
        bindingContext.ModelState.AddModelError(result.MemberName, result.Message);
    }
}

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