how can manual create a ODataQueryOptions on .ashx - asp.net-web-api

Question

i would like to reconstruction my last project.
in past, i did't use any Web API.
can i just use the ODataQueryOptions to do $filter, $orderby , $top ,$skip
for my query in my own handler.ashx ?
some thing like.
var option = new ODataQueryOptions(request.params);
var query = option.ApplyTo(db.products);

Answer 1

Based on sfuqua's answer above I made my own helper class that builds OdataQueryOptions class based on Odata Uri:
using System.Linq;
using System.Net.Http;
using System.Web.Http.OData;
using System.Web.Http.OData.Builder;
using System.Web.Http.OData.Query;
namespace OdataHelpers
{
public static class ODataBuilder<T>
{
public static ODataQueryOptions<T> BuildOptions(string oDataUri)
{
var baseUri = "";
var odUri = "";
var spl = oDataUri.Split('?');
if (spl.Count() == 0)
odUri = spl[0];
else
{
baseUri = spl[0];
odUri = spl[1];
}
if (string.IsNullOrEmpty(baseUri))
baseUri = "http://localhost/api/" + typeof(T).Name;
var request = new HttpRequestMessage(HttpMethod.Get, baseUri + "?" + oDataUri.Replace("?", ""));
var modelBuilder = new ODataConventionModelBuilder();
modelBuilder.AddEntity(typeof(T));
var edmModel = modelBuilder.GetEdmModel();
var oDataQueryContext = new ODataQueryContext(edmModel, typeof(T));
return new ODataQueryOptions<T>(oDataQueryContext, request);
}
}
}
Example use:
var OdataStuff = ODataBuilder<CustomerIntView>.BuildOptions("$orderby=Id");

Answer 2

One way to accomplish this is by manually constructing the request URI and setting that in the request parameter of the ODataQueryOptions constructor. So this may not be precisely what the original poster was looking for (question needed some clarification).
In my case I have a unit test, and I wanted to validate that the odata options were being applied to my queryable object. In the following sample code, assume that you are testing a ProductController that has a ProductName field in it.
// Manually set an OData query parameter
const string restUrl = "http://localhost/api/product?$orderby=ProductName";
// Need to construct an HTTP Context and a Request, then inject them into the controller
var config = new HttpConfiguration();
var request = new HttpRequestMessage(HttpMethod.Post, restUrl);
var route = config.Routes.MapHttpRoute(WebApiConfig.DefaultRouteName, "api/{controller}/{id}");
var routeData = new HttpRouteData(route, new HttpRouteValueDictionary { { "controller", "Product" } });
var controller = new ProductController()
{
Request = request,
ControllerContext = new HttpControllerContext(config, routeData, request),
Url = new UrlHelper(request)
};
// Build up the OData query parameters
var modelBuilder = new ODataConventionModelBuilder();
modelBuilder.AddEntity(typeof(Product));
var edmModel = modelBuilder.GetEdmModel();
var oDataQueryContext = new ODataQueryContext(edmModel, typeof(Product));
var oDataQueryOptions = new ODataQueryOptions<Product>(oDataQueryContext, _controller.Request);
// Finally, call the controller
var result = controller.Get(oDataQueryOptions);

Answer 3

I do think you can if you can constructor an instance of ODataQueryOptions.
But, What's this:
var option = new ODataQueryOptions(request.params);
Web API doesn't provide such constructor. Is it your own implementation?
Thanks.