How can I select where to post in web-api?

See more:

MVC

EF6.0

Hi,

I have a web-api post method that will save data from Json via postman to an SQL table. Now I need it to choose where to save the data using a parameter from the uri. Now I have this code currently:

private AH_ODS_DB_Entities db = new AH_ODS_DB_Entities();

[ResponseType(typeof(JT))]
public HttpResponseMessage PostJT(JT JT, Sales Sales, [FromUri] string auth, [FromUri] string tran)
{
    try
    {
        if (ModelState.IsValid)
        {
                    if (tran == null)
                    {
                        return Request.CreateResponse(HttpStatusCode.Unauthorized, "Unauthorized Access!");
                    }
                    else
                    {
                        switch (tran)
                        {
                            case "JT": db.JTs.Add(JT);
                                break;
                            case "sales": db.Sales_.Add(Sales);
                                break;
                        }
                    }
                    //db.SaveChanges();
                    return Request.CreateErrorResponse(HttpStatusCode.OK, "Added!");
                }
//just elses below

Unfortunately I am getting an error "can't bind multiple parameters to the request's content web api".

It goes like this: If I post with the uri parameter ?tran=JT, it should add data to the JT table in my sql DB. likewise if ?tran=sales then it posts to the sales table. Can anyone help me?