Question

我尝试扩展RequiredAttribute以进行一些本地化。我写了这个：

public class LocalizedRequiredAttribute : RequiredAttribute



{
    public LocalizedRequiredAttribute(string errorMessageResourceName)
    {
        this.ErrorMessageResourceName = string.IsNullOrEmpty(errorMessageResourceName) ? "Required_ValidationError" : errorMessageResourceName;
        ErrorMessageResourceType = typeof(bop.Core.Resources.Label);
    }
}

{ public LocalizedRequiredAttribute(string errorMessageResourceName) { this.ErrorMessageResourceName = string.IsNullOrEmpty(errorMessageResourceName) ? "Required_ValidationError" : errorMessageResourceName; ErrorMessageResourceType = typeof(bop.Core.Resources.Label); } }

在客户端，不会呈现验证消息。怎么了？感谢帮助。卢卡

Answer 1

在您的后续评论中，您指定了客户端验证无效。看起来你问了同样的问题here，但为了StackOverflow，我会提供答案。

LocalizedRequiredAttribute类还必须实现IClientValidatable才能使客户端验证工作：

using System.Web.Mvc;
public class LocalizedRequiredAttribute : RequiredAttribute, IClientValidatable
{
    // your previous code

    public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
    {
        yield return new ModelClientValidationRule
        {
            // format the error message to include the property's display name.
            ErrorMessage = FormatErrorMessage(metadata.DisplayName),

            // uses the required validation type.
            ValidationType = "required"
        };
    }
}

Answer 2

查看Darin Dimitrov撰写的this和this帖子。

希望这有帮助。

MVC 3 C＃RequiredAttribute扩展

2 个答案: