所以,我陷入了一种奇怪的行为,也就是说,我能够使用Postman (plugin of chrome)或使用发送(或POST)数据RESTClient(extension of Firefox),
但是无法从我位于项目之外的html文件中发送它.当我在chrome中打开html时显示以下错误:
OPTIONS http://localhost:1176/api/user/ 405 (Method Not Allowed) XMLHttpRequest cannot load http://localhost:1176/api/user/. Invalid HTTP status code 405
我无法弄清楚为什么会这样.以下是详细信息,您可能需要帮我解决我的错误:
UserController.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using WebAPIv2.Models;
namespace WebAPIv2.Controllers
{
public class UserController : ApiController
{
static IUserRepository userRepository = new UserRepository();
[HttpGet]
public List GetAllUsers()
{
return userRepository.GetAll();
}
[HttpGet]
public HttpResponseMessage GetUser(int id)
{
TableUser user = userRepository.Get(id);
if (user == null)
{
return Request.CreateErrorResponse(HttpStatusCode.NotFound, "User Not found for the Given ID");
}
else
{
return Request.CreateResponse(HttpStatusCode.OK, user);
}
}
[HttpPost]
public HttpResponseMessage PostUser(TableUser user)
{
user = userRepository.Add(user);
var response = Request.CreateResponse(HttpStatusCode.Created, user);
string uri = Url.Link("DefaultApi", new { id = user.UserId });
response.Headers.Location = new Uri(uri);
return response;
}
[HttpPut]
public HttpResponseMessage PutUser(int id, TableUser user)
{
user.UserId = id;
if (!userRepository.Update(user))
{
return Request.CreateErrorResponse(HttpStatusCode.NotFound, "Unable to Update the User for the Given ID");
}
else
{
return Request.CreateResponse(HttpStatusCode.OK);
}
}
[HttpDelete]
public HttpResponseMessage DeleteProduct(int id)
{
userRepository.Remove(id);
return new HttpResponseMessage(HttpStatusCode.NoContent);
}
}
}
User.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace WebAPIv2.Models
{
public class User
{
public int UserId { get; set; }
public string UserName { get; set; }
public string Password { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Email { get; set; }
}
}
IUserRepository.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace WebAPIv2.Models
{
interface IUserRepository
{
List GetAll();
TableUser Get(int id);
TableUser Add(TableUser user);
void Remove(int id);
bool Update(TableUser user);
}
}
UserRepository.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace WebAPIv2.Models
{
public class UserRepository : IUserRepository
{
MastarsFriendsMVCDatabaseEntities userEntities;
public UserRepository()
{
userEntities = new MastarsFriendsMVCDatabaseEntities();
}
public List GetAll()
{
//throw new NotImplementedException();
return userEntities.TableUsers.ToList();
}
public TableUser Get(int id)
{
//throw new NotImplementedException();
var users = userEntities.TableUsers.Where(x => x.UserId == id);
if (users.Count() > 0)
{
return users.Single();
}
else
{
return null;
}
}
public TableUser Add(TableUser user)
{
//throw new NotImplementedException();
if (user == null)
{
throw new ArgumentNullException("item");
}
userEntities.TableUsers.Add(user);
userEntities.SaveChanges();
return user;
}
public void Remove(int id)
{
//throw new NotImplementedException();
TableUser user = Get(id);
if (user != null)
{
userEntities.TableUsers.Remove(user);
userEntities.SaveChanges();
}
}
public bool Update(TableUser user)
{
//throw new NotImplementedException();
if (user == null)
{
throw new ArgumentNullException("student");
}
TableUser userInDB = Get(user.UserId);
if (userInDB == null)
{
return false;
}
userEntities.TableUsers.Remove(userInDB);
userEntities.SaveChanges();
userEntities.TableUsers.Add(user);
userEntities.SaveChanges();
return true;
}
}
}
WebApiConfig.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http.Headers;
using System.Web.Http;
namespace WebAPIv2
{
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
// Web API configuration and services
// Web API routes
config.MapHttpAttributeRoutes();
//config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
}
}
}
index.html的:
TODO supply a title
-->
Web.config文件:
Chintan Soni.. 25
好.在@martennis回答的帮助下解决了这个问题,但稍微纠正了一下.
每件事情都很完美,只需要注意,我们需要在Package Manager Console中输入以下命令:
Install-Package Microsoft.AspNet.WebApi.Cors –IncludePrerelease
而不是@martennis提供的链接中显示的那个,之后,我的WebApiConfig.cs更新如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http;
using System.Web.Http.Cors;
namespace WebApiRESTfulwithJSON
{
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
// Web API configuration and services
var cors = new EnableCorsAttribute("*", "*", "*");
config.EnableCors(cors);
// Web API routes
config.MapHttpAttributeRoutes();
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
}
}
}
因此,解决了问题...... !!!
现在,我将能够从任何地方使用我的Web服务,从移动应用程序,Web应用程序或桌面应用程序调用它.
对于,如何从头开始创建它们,我写了我的第一篇博客(...虽然是Android开发人员,但从未尝试过为Android编写博客:-P无论如何......)
链接:http://programmingwithease.wordpress.com/2014/06/18/learning-asp-net-web-api-2-using-c/
好.在@martennis回答的帮助下解决了这个问题,但稍微纠正了一下.
每件事情都很完美,只需要注意,我们需要在Package Manager Console中输入以下命令:
Install-Package Microsoft.AspNet.WebApi.Cors –IncludePrerelease
而不是@martennis提供的链接中显示的那个,之后,我的WebApiConfig.cs更新如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http;
using System.Web.Http.Cors;
namespace WebApiRESTfulwithJSON
{
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
// Web API configuration and services
var cors = new EnableCorsAttribute("*", "*", "*");
config.EnableCors(cors);
// Web API routes
config.MapHttpAttributeRoutes();
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
}
}
}
因此,解决了问题...... !!!
现在,我将能够从任何地方使用我的Web服务,从移动应用程序,Web应用程序或桌面应用程序调用它.
对于,如何从头开始创建它们,我写了我的第一篇博客(...虽然是Android开发人员,但从未尝试过为Android编写博客:-P无论如何......)
链接:http://programmingwithease.wordpress.com/2014/06/18/learning-asp-net-web-api-2-using-c/
WebApi可能会阻止CORS请求.要在WebApi上启用CORS,请使用Microsoft.AspNet.WebApi.Cors包.有关详细信息,请查看http://www.asp.net/web-api/overview/security/enabling-cross-origin-requests-in-web-api
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