使用 HttpClient 将对象传递给 Web Api 时接收 "No resource found"

Question

背景

目前有一个 api 是我不久前创建的一个助手 api。这个 api 有一个控制器接收一个对象，然后相应地处理它。

问题

当我调用它时，我的接收 api 我收到以下错误消息的错误。

{"Message":"No HTTP resource was found that matches the request URI 'http://appdev.tenant.com/caseware32/api/DataServices/CreateDBF'.","MessageDetail":"No action was found on the controller 'DataServices' that matches the request."}

但是，控制器可以运行，因为我可以调用控件中的另一个函数，该函数可以为我提供所有客户端。我确保我的路由属性符合我的请求 url 但仍然没有成功。

代码

发送网页Api

public static async Task<bool> CreateDBF(string dPath)
{
    var postObject = (new DBFPostModel
    {
        destinationPath = dPath,
        fileName = "CustomDBF"
    });
    List<string> uniqueID = new List<string>();
    try
    {
        string requestUrl = "http://appdev.tenant.com/caseware32/api/DataServices/CreateDBF";

        HttpClient hc = new HttpClient();

        var method = new HttpMethod("POST");

        var values = new Dictionary<string, string>()
        {
            { "Id", "6"},
            { "Name", "Skis"},
            { "Price", "100"},
            { "Category", "Sports"}
        };

        var content = new FormUrlEncodedContent(values);

        var hrm = await hc.PostAsync(requestUrl, content);
        if (hrm.IsSuccessStatusCode)
        {
            var responseData = await hrm.Content.ReadAsStringAsync();
            return true;
        }
        else
        {
            return false;
        }
    }
    catch (Exception ex)
    {
        // TODO Log 
        return false;
    }
}

接收中Api

public class IncomingDbfModel
{
    public string Id { get; set; }
    public string Name { get; set; }
    public string Price { get; set; }
    public string Catergory { get; set; }
}

public class DataServicesController : ApiController
{
      [Route("api/DataServices/CreateDBF")]
    public IHttpActionResult CreateDBF(IncomingDbfModel postParam)
    {
        DatabaseServices dbServices = new DatabaseServices();
        bool success = dbServices.InsertDataIntoDBF(postParam);
        return Ok(success);
    }
}

错误

HTTP/1.1 404 Not Found
Cache-Control: no-cache
Pragma: no-cache
Content-Type: application/json; charset=utf-8
Expires: -1
Server: Microsoft-IIS/8.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Thu, 30 Mar 2017 15:17:38 GMT
Content-Length: 232

{"Message":"No HTTP resource was found that matches the request URI 'http://appdev.tenant.com/caseware32/api/DataServices/CreateDBF'.","MessageDetail":"No action was found on the controller 'DataServices' that matches the request."}

路由配置

 public static void Register(HttpConfiguration config)
    {
        // Web API configuration and services
        config.EnableCors();

        log4net.Config.XmlConfigurator.Configure();

        // Web API routes
        config.MapHttpAttributeRoutes();

        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );
    }

Answer 1

默认情况下，基于约定的 Web api 路由模板会排除 URL 模板 "api/{controller}/{id}" 中的操作名称。上面的示例在 requestUrl = "http://appdev.tenant.com/caseware32/api/DataServices/CreateDBF" 中包含与属性路由匹配的操作名称。 [Route("api/DataServices/CreateDBF")]

因此假设您打算使用属性路由。

将 HttpPost 属性应用于操作，以便路由知道如何处理 POST 请求

public class DataServicesController : ApiController {
    //POST api/DataServices/CreateDBF
    [HttpPost]
    [Route("api/DataServices/CreateDBF")]
    public IHttpActionResult CreateDBF(IncomingDbfModel postParam) {
        DatabaseServices dbServices = new DatabaseServices();
        bool success = dbServices.InsertDataIntoDBF(postParam);
        return Ok(success);
    }
}

来源：Attribute Routing in ASP.NET Web API 2 - HTTP Methods

Web API also selects actions based on the HTTP method of the request (GET, POST, etc). By default, Web API looks for a case-insensitive match with the start of the controller method name.

You can override this convention by decorating the mathod with any the following attributes:
[HttpDelete]
[HttpGet]
[HttpHead]
[HttpOptions]
[HttpPatch]
[HttpPost]
[HttpPut]

使用 HttpClient 将对象传递给 Web Api 时接收 "No resource found"

Receiving "No resource found" when passing an object to a WebApi using HttpClient

c#

asp.net-web-api-routing

asp.net-web-api2