c# - 无法在 Asp.NET MVC 中命中 Api 路由

Question

我有一个 ASP.NET MVC 应用程序。我正在向这个应用程序添加一些 API。我的一些 API 有效。其他人没有。我遇到的问题是我也不知道。我应该使用什么路线或 b。如果我没有正确注册路线。例如，我有以下 WebApi:

namespace MyProject.Controllers
{
    public class ProjectApiController : System.Web.Http.ApiController
    {
        [ResponseType(typeof(IEnumerable<Product>))]
        public IHttpActionResult Get(string search, int max)
        {
            // Clean up the query
            string query = q.Trim().ToLower();

            // Get the products
            List<Product> products = Product.GetAll();
            var results = (from product in products
                           where product.Name.ToLower().Contains(query)
                           select new
                           {
                               Id = product.Id,
                               Name = product.Name
                           }).Take(max);

            // Return the results
            return Ok(results);
        }

        [ResponseType(typeof(IEnumerable<Category>))]
        public async Task<IHttpActionResult> GetCategories(string search, int max)
        {
            // Clean up the query
            string query = q.Trim().ToLower();

            // Get the products
            List<Category> products = Category.GetAll();
            var results = (from category in categories
                           where category.Name.ToLower().Contains(query)
                           select new
                           {
                               Id = category.Id,
                               Name = category.Name
                           }).Take(max);

            // Return the results
            return Ok(results);
        }
    }
}

当我访问 /api/projectApi?search=tes&max=5 时，如果第二种方法被注释掉，我会得到一个我想要的 JSON 数组。如果第二种方法未注释，我会收到一条错误消息，内容如下:

"Message":"An error has occurred.","ExceptionMessage":"Multiple actions were found that match the request: \r\nGet on type MyProject.Controllers.ProjectApiController\r\nGetCategories on type MyProject.Controllers.PrjectApiController","ExceptionType":"System.InvalidOperationException","StackTrace":"   at System.Web.Http.Controllers.ApiControllerActionSelector.ActionSelectorCacheItem.SelectAction(HttpControllerContext controllerContext)\r\n   at System.Web.Http.Controllers.ApiControllerActionSelector.SelectAction(HttpControllerContext controllerContext)\r\n   at System.Web.Http.ApiController.ExecuteAsync(HttpControllerContext controllerContext, CancellationToken cancellationToken)\r\n   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"}

理想情况下，我希望能够调用:

/api/projectApi/projects?search=tes&max=5 和

/api/projectApi/categories?search=tes&max=5

但是，我似乎无法弄清楚该怎么做。我做错了什么？

谢谢!

Answer 1

如果您使用 ASP.NET api 2，您现在还可以使用路由属性来装饰您的方法，例如

[Route("/api/projectApi/products")]
[ResponseType(typeof(IEnumerable<Product>))]
public IHttpActionResult Get(string search, int max)
{ ...
}

和

[Route("/api/projectApi/categories")]
[ResponseType(typeof(IEnumerable<Category>))]
public async Task<IHttpActionResult> GetCategories(string search, int max)
{ ...
}

参见 http://www.asp.net/web-api/overview/web-api-routing-and-actions/attribute-routing-in-web-api-2