Question

I am currently using the following:

<input type="submit" id="SaveNew" value="Create" /> 

which will submit the Create page.
It then calls the Controller:

[HttpPost]
public ActionResult Create(Prog prog)

I have additional information on the screen besides the Model Prog that also needs to be send to the Controller. How do I do this? How is it possible to do something like:

[HttpPost]
public ActionResult Create(Prog prog, var1, var2, var3)

Answer 1

Just name the form elements as the variables in the method signature. Everything should stay in the same form.
Model:

public class SimpleModel
{
    public int Number { get; set; }
}

View:

<%= Html.BeginForm("Process", "Home") %>
<%= Html.TextBox("Number") %> <!-- This is Model property -->
<%= Html.TextBox("additional") %> <!-- This is additional parameter -->
<input type="submit" value="Go" />
</form>

Controller:

public ActionResult Process(SimpleModel model, string additional)
{
    // ...
    // model.Number will have the value from the "Number" text box
    // additional will have the value from the "additional" text box
}