这是路由问题吗？

Question

I have developed an HTML form wizard that helps creating an object compose the data to send to the server.

I have a controller with two action methods as follow:

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult SaveItem( TypeOneItem model, int customerID ) {

and

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult SaveItem( TypeTwoItem model, int customerID ) {

TypeOneItem and TypeTwoItem are both subclass of BaseItem. The class are defined this way

public class BaseItem 
{
    public int ItemID { get; set; }
    public string Name { get; set; }
}

public class TypeOneItem : BaseItem
{
    public int Property1 { get; set; }
    public string Property2 { get; set; }
}

public class TypeTwoItem : BaseItem
{
    public string Property3 { get; set; }
    public int Property4 { get; set; }
    public double Property5 { get; set; }
}

However, even if I am posting the right data to be binded to just one of the two concrete classes I get the error " The current request for action 'SaveItem' on controller type 'ManageController' is ambiguous between the following action methods: System.Web.Mvc.ActionResult SaveItem(TypeOneItem, Int32) System.Web.Mvc.ActionResult SaveItem(TypeTwoItem, Int32) "

Why does this happens? I do not want to change the server action name and hard code the difference on the UI wizard. Is there another way to solve this problem?

Answer 1

MVC supports method overloading based on attributes but it wont do it solely based on different method signatures. You can look at for reference ASP.NET MVC ambiguous action methods