public MyApiResult functionGetDataBasedOnParameter(string stringEmailAddress, string stringPassword, string stringStartData, string stringEndData)
{

    return new MyApiResult { strEmailAddress = "abcassda@gmail.com", strPassword = "JohnnyBlade", datetimeStartDate = Convert.ToDateTime(stringStartData),datetimeEndDate = Convert.ToDateTime(stringEndData)
    };
}

RouteTable.Routes.MapHttpRoute(
        "DefaultApi",
        "api/{controller}/{action}/{id}",
        new { id = System.Web.Http.RouteParameter.Optional }
    );