How to pass an object of type as a parameter to Web Api Get/Post method

Question

Here is my Post method and i am passing an object which contains parameters

public class TransactionController : ApiController { [HttpPost] public TransactionResponse mytest2(TransactionOperationInput input) { // some operation here } }

Here is the URL i am trying to test

http://localhost:33755/api/Transaction/mytest2?SourceKey=abcdef&Pin=123&Criteria=2018-09-12 00:00:00

Outcome When method is set to POST and Get

[HttpPost] : I get an error 405 method not allowed.

[HttpGet] : input parameter is NULL

This is the Register Route class; ( sorry i am new to Route tables)

public static void RegisterRoutes(RouteCollection routes) { routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); routes.MapRoute( name: "Default", url: "{controller}/{action}/{id}", defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional } ); }

Do i need to update route table? or Is my URL wrong?

Also, should i have the service method as Post or Get?

You cannot navigate to a POST method (it needs to be a [HttpGet]) — user3559349
– user3559349, Commented Sep 16, 2018 at 11:24

user3559349 · Accepted Answer · 2018-09-16 11:41:44Z

You cannot navigate to a [HttpPost] method, so it needs to be a [HttpGet]. And to bind to a complex object from query string values, you need to use the [FromUri] attribute

[HttpGet] // can be omitted public TransactionResponse mytest2([FromUri]TransactionOperationInput input)

For more information on parameter binding in web-api, refer Parameter Binding in ASP.NET Web API.

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