ASP.NET Web API:如果从资源设置错误消息,则模型有效

时间:2013-06-27 08:59:14

标签: c# resources asp.net-web-api data-annotations model-validation

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

这是我的模特:

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;
    }

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);
        }
    }
}

我是在POST请求中发送的:

{ Email: "asd@asd.com", Password: "a" }

ModelState.IsValid false ,响应符合预期:

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

但是如果我在验证属性中使用资源(配置为公共嵌入式资源构建操作):

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

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

(' Test '键仅包含' Test '字符串值) ModelState.IsValid 为真。

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

1 个答案:

答案 0 :(得分:3)

我尝试了你的解决方案,但我不懂类Resources.Localization。它从哪里来的? 我的解决方案如下所述,它使用了很好的资源。

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,一个通用的Resources.resx,包含字符串键/值Test / something;另一个是Resources.de-DE.resx,包含字符串键/值Test / something_DE。

使用fiddler我发了这个:

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

体:

{Email:"text@test.com", Password:"a"}

响应是字符串:

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,请求标题为:

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

回应是:

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"]}}

正如您所看到的,消息是" _DE"因为它是从本地化资源文件中读取的。

这是你想要实现的吗?

亲切的问候。

编辑: 路线配置是

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

Web.config添加了下一部分:

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