ASP.NET Web API:如果从资源中设置了错误消息，则模型有效

Question

问题是，如果我使用。rsx文件（参考资料）提供自定义错误消息，那么在ApiController中，ModelState.isValid总是true。

null

public class LoginModel
{
    public string Email { get; set; }

    [Required]
    [MinLength(5)]
    public string Password { get; set; }
}

apicontroller中的方法:

    [HttpPost]
    [ModelValidationFilter]
    public void Post(LoginModel model)
    {
        var a = ModelState.IsValid;
    }

和过滤器:

public class ModelValidationFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(HttpActionContext actionContext)
    {
        if (actionContext.ModelState.IsValid == false)
        {
            actionContext.Response = actionContext.Request.CreateErrorResponse(HttpStatusCode.BadRequest, actionContext.ModelState);
        }
    }
}

我要以POST请求的方式发送这个:

{ Email: "[e-mail]", Password: "a" }

ModelState.IsValid为false，响应与预期相同:

{
   "Message": "The request is invalid.",
   "ModelState":
   {
       "model.Password":
       [
           "The field Password must be a string or array type with a minimum length of '5'."
       ]
   }
}

但是如果我使用验证属性中的资源（配置为公共和嵌入资源构建操作）:

public class LoginModel
{
    public string Email { get; set; }

    [Required]
    [MinLength(5, ErrorMessageResourceName = "Test", ErrorMessageResourceType = typeof(Resources.Localization))]
    public string Password { get; set; }
}

('test'key仅保存'test'字符串值）ModelState.IsValid为true。

Resources类是可见的，resharper正确验证ErrorMessageResourceName中提供的字符串。

Answer 1

我尝试了您的解决方案，但我不理解类资源。它是从哪里来的？我的解决方案如下所述，它与良好的资源一起工作。

型号:

using TestApp.Properties;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;

namespace TestApp.Models
{
    public class LoginModel
    {
        public string Email { get; set; }
        [Required]
        [MinLength(5, ErrorMessageResourceName="Test", ErrorMessageResourceType=typeof(Resources))]
        public string Password { get; set; }
    }
}

ModelValidationFilterAttribute:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Web;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
using System.Net.Http;

namespace TestApp.Controllers
{
    public class ModelValidationFilterAttribute: ActionFilterAttribute
    {
        public override void OnActionExecuting(HttpActionContext actionContext)
        {
            if (actionContext.ModelState.IsValid == false)
            {
                actionContext.Response = actionContext.Request.CreateErrorResponse(HttpStatusCode.BadRequest, actionContext.ModelState);
            }
        }
    }
}

两个资源文件，一个是常规的resources.resx，包含字符串key/value test/something；另一个是resources.de-de.resx，包含字符串key/value test/something_de。

我用fiddler发了这个:

Header:
User-Agent: Fiddler
Host: localhost:63315
Content-Length: 37
Content-Type: application/json

正文:

{Email:"[e-mail]", Password:"a"}

null

HTTP/1.1 400 Bad Request
Cache-Control: no-cache
Pragma: no-cache
Content-Type: application/json; charset=utf-8
Expires: -1
Server: Microsoft-IIS/8.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?RDpcV29ya1xDU1xGYkJpcnRoZGF5QXBwXEZiQmRheUFwcDJcYXBpXGxvZ2lu?=
X-Powered-By: ASP.NET
Date: Fri, 28 Jun 2013 14:56:54 GMT
Content-Length: 83

{"Message":"The request is invalid.","ModelState":{"model.Password":["something"]}}

对于de-DE，请求头为:

User-Agent: Fiddler
Host: localhost:63315
Content-Length: 37
Accept-Language: de-DE
Content-Type: application/json

答复是:

HTTP/1.1 400 Bad Request
Cache-Control: no-cache
Pragma: no-cache
Content-Type: application/json; charset=utf-8
Expires: -1
Server: Microsoft-IIS/8.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?RDpcV29ya1xDU1xGYkJpcnRoZGF5QXBwXEZiQmRheUFwcDJcYXBpXGxvZ2lu?=
X-Powered-By: ASP.NET
Date: Fri, 28 Jun 2013 14:57:39 GMT
Content-Length: 86

{"Message":"The request is invalid.","ModelState":{"model.Password":["something_DE"]}}

如您所见，从本地化资源文件读取消息时，消息带有“_DE”。

这是你想要实现的吗？

亲切的问候。

编辑:路由配置为

config.Routes.MapHttpRoute(
          name: "LoginRoute",
          routeTemplate: "api/login",
          defaults: new { controller = "Login", action = "PostLogin" },
          constraints: new { httpMethod = new HttpMethodConstraint(HttpMethod.Post) }
          );

Web.config添加了下一节:

<system.web>
...
        <globalization culture="auto" uiCulture="auto" />
...
</system.web>