How to create ASP.NET MVC4 json Web API which allows to search products by id, barcode, search term or retrieve all products since date ?
I tried to use ASP.NET MVC4 controller below.
Calling
http://localhost:52216/admin/api/Products/GetSince?since=2014-03-16%2021:47:29&_=1395007124964
returns error
Multiple actions were found that match the request:
System.Net.Http.HttpResponseMessage GetSince(System.String) on type MyApp.Controllers.ProductsController\r\n
System.Net.Http.HttpResponseMessage GetId(System.String) on type MyApp.Controllers.ProductsController"
How to fix this ? This code looks ugly, it contains number of similar methods. Which is best way to create such API ? How to improve this code ? Http GET method should used but method names and signatures can changed.
ASP.NET/Mono MVC4, jquery, jquery UI are used. Windows 2003 server should also supported, so .NET 4.5 or MVC5 cannot used.
public class ProductsController : ApiController
{
[HttpGet]
public HttpResponseMessage GetSince([FromUri]string since))
{
var toodelist = GetProducts(since, null, null, null);
return Request.CreateResponse(HttpStatusCode.OK,
new { products = toodelist.ToArray() });
}
[HttpGet]
public HttpResponseMessage GetId([FromUri]string id)
{
var toodelist = GetProducts(null, null, id, null);
return Request.CreateResponse(HttpStatusCode.OK,
new { products = toodelist.ToArray() });
}
[HttpGet]
public HttpResponseMessage GetBarcode([FromUri]string barcode)
{
var toodelist = GetProducts(null, barcode, null, null);
return Request.CreateResponse(HttpStatusCode.OK,
new { products = toodelist.ToArray() });
}
[HttpGet]
public HttpResponseMessage GetTerm([FromUri]string term)
{
var toodelist = GetProducts(null, null, null, term);
return Request.CreateResponse(HttpStatusCode.OK,
new { products = toodelist.ToArray() });
}
static List<Product> GetProducts(string since, string barcode, string id, string term)
{
... retrieves list of product from database using specified search criteria
if not null
}
}
How about using a search criteria DTO like this?
public class SearchCriteria
{
public int? Id { get; set; }
public DateTime? Since { get; set; }
// Other properties
}
Action method will be like this.
public class ProductsController : ApiController
{
public HttpResponseMessage GetProducts([FromUri]SearchCriteria crit))
{
// Validate and clean crit object
var list = GetProducts(crit);
// return list
}
}
GetProducts can return the list of products based on the properties set in SearchCriteria object. If a query string field is not present, corresponding property will be null.
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