How do I get values for "Html.TextBoxes" from Request.Forms

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C#

ASP.NET

MVC

With MVC5 I am using "Request.Form" to get back data from a submit button and send it to an "ActionResult" but I am getting all nulls back from those Request.Forms. How do I get values for "Html.TextBoxes"

HomeController.cs

public class HomeController : Controller
{
    private testContext db = new testContext();
     public AddToModel addto = new AddToModel();
     public ActionResult AddAction()
    {
        addto.thistable = db.Data1.ToList();
        if (addto.thistable != null)
        {
            addto.thistable.Add(new Table1 { datetime0 = DateTime.Now.ToString(), col1 = Convert.ToString(Request.Form["c1"]), col2 = Convert.ToString(Request.Form["c2"]), col3 = Convert.ToString(Request.Form["c3"]) });
            return View(addto);
         }
         else
         {
              return null;
         }
    }
}

Index.cshtml

<center><table><tr>
    <td align="center"colspan="3">
        Input Data
    </td>
</tr>
<tr>
    <td align="center">
        col1
    </td>
    <td align="center">
        col2
    </td>
    <td align="center">
        col3
    </td>
    <td></td>
</tr><tr>
    <td>
        @Html.TextBox("c1")
    </td>
    <td>
        @Html.TextBox("c2")
    </td>
    <td>
        @Html.TextBox("c3")
    </td></tr><tr><td colspan="3" align="center"><br />
        <form action="@Url.Action("AddAction")" method="post"><input type="submit" id="AddTo" value="Add To" /></form><br /><br /><br />
    </td>
</tr></table></center>