Question

我已将数据库中的视图导入到edmx，并将[Key]属性添加到模型POCO类中：

名称空间TFOMS.Domain.Model

{
    using System;
    using System.Collections.Generic;
    using System.ComponentModel.DataAnnotations;

    public partial class vw_Tariffs_PR
    {

        public int TariffId { get; set; }
        public string MCOD { get; set; }
        public string OrgName { get; set; }
        public Nullable<int> IDPR { get; set; }
        public string PRNAME { get; set; }
        public Nullable<int> IDSP { get; set; }
        public string SPNAME { get; set; }
        public Nullable<byte> isChild { get; set; }
        public decimal tariff { get; set; }
        public System.DateTime DATEBEG { get; set; }
        public Nullable<System.DateTime> DATEEND { get; set; }
    }
}

我需要在webapi odata控制器中公开这个视图，但是当我向WebApiConfig.cs添加以下代码时

 public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            // Web API configuration and services
            ODataModelBuilder builder = new ODataConventionModelBuilder();
            builder.EntitySet<vw_Tariffs_PR>("vw_Tariffs_PR");
            var model = builder.GetEdmModel();
            config.MapODataServiceRoute(
            routeName: "ODataRoute",
            routePrefix: "odata",
            model: model);

            // Web API routes
            config.MapHttpAttributeRoutes();

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

但是当我启动应用程序时，我收到错误： {＆＃34;实体＆＃39; vw_Tariffs_PR＆＃39;没有定义键。＆＃34;} 在 var model = builder.GetEdmModel（）;

将[Key]属性添加到TariffId属性后，我收到错误：

public class Global : HttpApplication
{
    void Application_Start(object sender, EventArgs e)
    {
        // Код, выполняемый при запуске приложения
        AreaRegistration.RegisterAllAreas();
        **GlobalConfiguration.Configure(WebApiConfig.Register);**
        RouteConfig.RegisterRoutes(RouteTable.Routes);            
    }
}

在线GlobalConfiguration.Configure（WebApiConfig.Register）; {＆＃34; ValueFactory尝试访问此实例的属性值。＆＃34;}

任何人都可以解释如何在odata控制器中公开视图，我做错了什么？

Answer 1

问题在于WebApiConfig.cs中的路由序列，odata路由必须在webapi路由之后：

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

            // Web API routes
            config.MapHttpAttributeRoutes();

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

            // Web API configuration and services
            ODataModelBuilder builder = new ODataConventionModelBuilder();
            builder.EntitySet<vw_Tariffs_PR>("vw_Tariffs_PR");
            var model = builder.GetEdmModel();
            config.MapODataServiceRoute(
            routeName: "ODataRoute",
            routePrefix: "odata",
            model: model);

        }
    }

如何在WebAPI Odata V4中公开数据库视图

1 个答案: