Cant pass data from one method to another in same controller - asp.net-mvc

Question

I am developing MVC application.
I am trying to pass the data from one method to another method in same controller.
But data doesn't pass properly...
Please check below code... I am trying to pass the Product list from Create to Save data method.
namespace StockWatchScreen.Controllers
{
public class OrderController : Controller
{
public class OrderProduct
{
public string SectionCode { get; set; }
public double Size { get; set; }
public double Thickness { get; set; }
public double Length { get; set; }
public double Quantity { get; set; }
}
public ActionResult Create()
{
List<OrderProduct> oProductList = new List<OrderProduct>();
OrderProduct oProduct = new OrderProduct();
oProduct.SectionCode = "123";
oProduct.Length = "123";
oProduct.Size = "123";
oProduct.Thickness = "123";
oProduct.Quantity = "123";
oProductList.Add(oProduct);
}
return RedirectToAction("SaveData", oProductList);
}
public ActionResult SaveData(List<OrderProduct> oProductList)
{
ViewBag.ProductList = oProductList;
ViewBag.OrderNo = "12321#";
return View();
}
}
}
}
In SaveData method, oProductList list shows always null.
What is reason ?

Answer 1

You need to return :return SaveData( oProductList); .You don't need to return RedirectToAction , and try to avoid using TempData["oProduct"] using TempData in mvc is not good practice.
Using AjaxBeginForm you on succes you can get result return SaveData( oProductList);and put it where you want .also you can use UpdateTargetId.

Answer 2

You can't send model like this in RedirectToAction, you should use tempdata for this communicating between actions like this
public ActionResult Create()
{
List<OrderProduct> oProductList = new List<OrderProduct>();
OrderProduct oProduct = new OrderProduct();
oProduct.SectionCode = "123";
oProduct.Length = "123";
oProduct.Size = "123";
oProduct.Thickness = "123";
oProduct.Quantity = "123";
oProductList.Add(oProduct);
}
TempData["oProduct"] = oProductList;
return RedirectToAction("SaveData");
}
And in the recieving controller
public ActionResult SaveData(List<OrderProduct> oProductList)
{
ViewBag.ProductList = TempData["oProduct"] as List<OrderProduct> ;
ViewBag.OrderNo = "12321#";
return View();
}
This is because RedirectToAction is doing a 301 redirection, and it is actually the client initiating a Get request to the /SaveData action.