ASP.NET Web API:若从资源中设置了错误消息，则模型有效

本文关键字：消息 错误 有效 模型 设置 API Web NET 资源 ASP | 更新日期: 2023-09-27 18:20:02

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

这是我的型号：

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);
        }
    }
}

我在POST请求中发送这个：

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

ModelState.IsValid为false，响应如预期：

{
   "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Public和Embedded Resource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'键只包含'Test'字符串值）ModelState.IsValid为true。

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

ASP.NET Web API:若从资源中设置了错误消息，则模型有效

我试过你的解决方案，但我不理解Resources.Localization类。它是从哪里来的？我的解决方案如下所述，它使用了良好的资源。

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，一个是通用Resources.resx，包含字符串key/value Testsomething；另一个是Resources.de-de.resx，包含字符串key/value Test/something_de。

使用fiddler我发送了这个：

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

正文：

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

响应为字符串：

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，请求标头为：

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

回复为：

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，消息在从本地化资源文件中读取时带有"_DE"。

这是你想要实现的吗？

致以亲切的问候。

编辑：路线配置为

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>
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