webapi

Microsoft.AspNet.WebApi.WebHost
Microsoft.AspNet.WebApi.OData

protected void Application_Start(object sender, EventArgs e)
{
    WebApiConfig.Register(GlobalConfiguration.Configuration);
}

public static void Register(HttpConfiguration config)
{
    ODataModelBuilder modelBuilder = new ODataConventionModelBuilder();
    modelBuilder.EntitySet<Product>("Products");

    Microsoft.Data.Edm.IEdmModel model = modelBuilder.GetEdmModel();
    config.Routes.MapODataRoute("ODataRoute", "odata", model);


    var queryAttribute = new QueryableAttribute()
    {
        AllowedQueryOptions = AllowedQueryOptions.All
    };

    config.EnableQuerySupport(queryAttribute);

    // Uncomment the following line of code to enable query support for actions with an IQueryable or IQueryable<T> return type.
    // To avoid processing unexpected or malicious queries, use the validation settings on QueryableAttribute to validate incoming queries.
    // For more information, visit http://go.microsoft.com/fwlink/?LinkId=279712.
    //config.EnableQuerySupport();

    // To disable tracing in your application, please comment out or remove the following line of code
    // For more information, refer to: http://www.asp.net/web-api
    //config.EnableSystemDiagnosticsTracing();
}

public class ProductsController : EntitySetController<Product, int>
{
    private static List<Product> products = new List<Product>()
                                                {
                                                    new Product() {Id = 1, Name = "Hat", Price = 15, Category = "Apparel"},
                                                    new Product() {Id = 2, Name = "Socks", Price = 5, Category = "Apparel"},
                                                    new Product() {Id = 3, Name = "Scarf", Price = 12, Category = "Apparel"},
                                                    new Product() {Id = 4, Name = "Yo-yo", Price = 4.95M, Category = "Toys"},
                                                    new Product() {Id = 5, Name = "Puzzle", Price = 8, Category = "Toys"},
                                                };

    public override IQueryable<Product> Get()
    {
        return products.AsQueryable();
    }

    protected override Product GetEntityByKey(int key)
    {
        return products.Single(p => p.Id == key);
    }
}