未找到与请求URI'Myurl'匹配的HTTP资源在与请求相匹配的控制器'controllername'上未找到操作

Question

Webapi方法在RestConsole上运行良好，但是在AndroidApplication中调用该Webapi方法时会显示错误

{“ Message”：“未找到与请求URI'http: //beatrootstudios.co.in/api/apiCityInfo/PostSearchByCategory '相匹配的HTTP资源。”，

“ MessageDetail”：“在与请求匹配的控制器'apiCityInfo'上未找到任何动作。” }

甚至我尝试了我从CityInfo到apiCityInfo的跟踪控制器名称，还尝试了各种路由技巧，正如Google在许多示例中提到的那样

我也尝试通过在下面的控制器中提到的Actionname和httppost动词放置...

我的Contoller代码是

public class apiCityInfoController : ApiController
{
    private DBContext db = new DBContext();
     [HttpPost, ActionName("PostSearchByCategory")]
    public IHttpActionResult PostSearchByCategory(string CategoryName)
    {
        var errorMessage = "";
        int errorCode = 0;
        //string json = null;
        string jsonResult = "Error";
        var SubCategory = db.CityDatas.Where(x => x.CategoryName.Equals(CategoryName)).ToList().FirstOrDefault().SubCategoryName; 

        try
        {

            if (SubCategory !=null)
            {
                //errorMessage = " Login ID cannot be Null ";
                //errorCode = 1;
                var SubCategoryresult = (from p in db.CityDatas
                              where p.CategoryName.Equals(CategoryName)
                              select new
                              {

                                  SubCategoryName = p.SubCategoryName,


                              }
                   ).ToList();
                var data = new
                {
                    Result = new
                    {
                        //ErrorCode = errorCode,
                        //ErrorMessage = errorMessage,
                        ResultSet = SubCategoryresult,

                    }
                };
                return Json(data);

            }
            else
            {
                var Dataresult = (from p in db.CityDatas
                                         where p.CategoryName.Equals(CategoryName)
                                         select new
                                         {
                                             DataImage = p.DataImage,
                                             DataName = p.DataName,
                                             DataAddress = p.DataAddress,
                                             DataPhoneNo = p.DataPhoneNo,                                                
                                         }
                 ).ToList();
                    var data = new
                    {
                        Result = new
                        {
                            ResultSet = Dataresult,


                        }
                    };

                    //jsonResult = JsonConvert.SerializeObject(data);
                    return Json(data);

            }
        }
        catch (Exception e)
        {
            errorCode = 401;
            errorMessage = e.Message;
            var data = new
            {
                Result = new
                {
                    ErrorCode = errorCode,
                    ErrorMessage = "CategoryName Not Exists",

                }
            };

            jsonResult = JsonConvert.SerializeObject(data);
        }

        return Ok(jsonResult);
    }

模型零件是

[Table("CityInfo")] 
public class CityData
{
    //[DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)] 
    [Key]
    public int CityInfo_Id { get; set; }
    public String CategoryName { get; set; }
    public String SubCategoryName { get; set; }
    public String DataImage { get; set; }
    public String DataName { get; set; }
    public String DataAddress { get; set; }
    public String DataPhoneNo { get; set; }
}

模型中的DBContext

public class DBContext : DbContext
{

    public DBContext()
        : base("name=DefaultConnection")
    {
    }

    public DbSet<WebApi.Models.CityData> CityDatas { get; set; }

}

表定义是

CREATE TABLE [dbo].[CityInfo] (
[CityInfo_Id]     INT            IDENTITY (1, 1) NOT NULL,
[CategoryName]    NVARCHAR (100) NULL,
[SubCategoryName] NVARCHAR (100) NULL,
[DataImage]       NVARCHAR (MAX) NULL,
[DataName]        NVARCHAR (100) NULL,
[DataAddress]     NVARCHAR (300) NULL,
[DataPhoneNo]     NVARCHAR (100) NULL,
PRIMARY KEY CLUSTERED ([CityInfo_Id] ASC)

）;

WebApi Config.cs文件是

 public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {

        config.MapHttpAttributeRoutes();


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

路由Config.cs文件是

 public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );
    }

Global.asx文件为

 public class WebApiApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        GlobalConfiguration.Configure(WebApiConfig.Register);
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);
        Database.SetInitializer<DBContext>(null);

    }
}

我究竟做错了什么？ 我该如何解决错误？

Answer 1

参数CategoryName是非可选的，因此您需要将其作为参数包含在请求中。 该URL应该如下所示： http://beatrootstudios.co.in/api/apiCityInfo/PostSearchByCategory?CategoryName=category : http://beatrootstudios.co.in/api/apiCityInfo/PostSearchByCategory?CategoryName=category ，您可能希望将此操作设为GET操作，而不是POST。