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ASP WebApi是否获取字符串id为的响应?

asp.net-web-api linq asp.net-mvc c#

michasaucer · 技术社区 · 7 年前

我有一个用户表。用户的ID是一个 string . 我得到的结果是这样的:

    // GET: api/WatchedProduct
    [HttpGet]
    public IEnumerable<WatchedProduct> GetWatchedProduct(string id)
    {
        var productsList = id == String.Empty ?
            db.WatchedProducts.Where(u => u.ApplicationUserId == id).ToList() :
            db.WatchedProducts.Where(u => u.ApplicationUserId == loggedUserId).ToList();

        return productsList;
    }

当我在Postman中调用API时,我得到以下响应:

{
"message": "No HTTP resource was found that matches the request URI 'http://.../api/WatchedProduct'.",
"messageDetail": "No action was found on the controller 'WatchedProduct' that matches the request."
}

我的问题是,如何使 GetWatchedProduct id 是 int ( GetWatchedProduct(int? id) ) ? 可以对字符串执行同样的操作吗?我需要另一种获取方法吗?

使用字符串param调用API时:

http://localhost.../api/WatchedProduct/StringidHere

这是可行的,我想在我的控制器中有一个GET方法。什么时候? String.Empty 当我传递一根线的时候。

RouteConfig.cs

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

        routes.MapMvcAttributeRoutes();
        //AreaRegistration.RegisterAllAreas();

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

编辑2

WebApiConfig.cs

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        /*var cors = new EnableCorsAttribute("http://localhost:4200", "*", "GET,POST,PUT,DELETE,OPTIONS");
        cors.SupportsCredentials = true;

        config.EnableCors(cors);*/

        // Web API configuration and services
        // Configure Web API to use only bearer token authentication.
        config.SuppressDefaultHostAuthentication();
        config.Filters.Add(new HostAuthenticationFilter(OAuthDefaults.AuthenticationType));

        // Web API routes
        config.MapHttpAttributeRoutes();

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

编辑3:

     // GET: api/Product/search?str=kaarol
    [Route("search")]
    public IEnumerable<Product> GetSearch(string str)
    {
        return db.Products.Where(p => p.Name.Contains(str)).ToList();
    }

但在我的例子中,我希望有一个方法可以调用 /Api/Watched... 和 StringID

2 回复 | 直到 7 年前

Community Mohan Dere 6 年前

通常你的路线是这样的 GET /api/controllerName/ GET /api/controllerName/customRoute 您需要路由您的方法。

// GET: api/WatchedProduct
[HttpGet]
[Route("WatchedProduct")]
public IEnumerable<WatchedProduct> GetWatchedProduct(string id)
{
    var productsList = id == String.Empty ?
        db.WatchedProducts.Where(u => u.ApplicationUserId == id).ToList() :
        db.WatchedProducts.Where(u => u.ApplicationUserId == loggedUserId).ToList();

    return productsList;
}

更多信息 Microsoft docs here

编辑

如果您的控制器名称为 WatchedProductController

public class WatchedProduct : ApiController
{
    // GET: api/WatchedProduct
    [HttpGet]
    public IEnumerable<WatchedProduct> Get(string id)
    {
        var productsList = id == String.Empty ?
        db.WatchedProducts.Where(u => u.ApplicationUserId == id).ToList() :
        db.WatchedProducts.Where(u => u.ApplicationUserId == loggedUserId).ToList();

        return productsList;
    }
}

Gurpreet_Carmel_5 7 年前

你可以试试这样的

public class WatchedProduct : ApiController
{
 // GET: api/WatchedProduct
 [HttpGet]
  [Route("WatchedProduct")]
   public IEnumerable<WatchedProduct> Get()
  {
   var context = Request.Properties["MS_HttpContext"] as HttpContext;
   var id = context.Request.QueryString["id"];
    var productsList = id == String.Empty ?
    db.WatchedProducts.Where(u => u.ApplicationUserId == id).ToList() :
    db.WatchedProducts.Where(u => u.ApplicationUserId == loggedUserId).ToList();

    return productsList;
  }
}

应适用于两种情况,因为它满足两种路线。