Submit a Form in a View with an array.

I have a View that I need to update to a form submit for security reasons.  I need to be able to use HttpPost instead of HttpGet for my controller action.  I need help converting this.  

The controller is:

 [HttpPost]
        public ActionResult SelectType(int type)
        {
            if (user.bomDetails.type != type)
            {
                List<tbl_Cart> cartItems = (from x in bomDB.tbl_Cart
                                            where x.UserID == user.id
                                            select x).ToList();

                foreach (tbl_Cart cartItem in cartItems)
                {
                    bomDB.tbl_Cart.Remove(cartItem);
                }
            }

            tbl_User_Bom bomUserMe = (from x in bomDB.tbl_User_Bom
                                      where x.ID == user.id
                                      select x).Single();
            bomUserMe.Type = type;
            bomDB.SaveChanges();

            return RedirectToAction("GeneralInfo");
        }

The current View has the following:

@model master.Areas.BillofMaterial.Models.tbl_Type[,]
@{
    ViewBag.Title = "Home";
    master.Areas.BillofMaterial.Models.tbl_Cart cart = new master.Areas.BillofMaterial.Models.tbl_Cart();
    Layout = "~/Areas/BillofMaterial/Views/Shared/_Layout.cshtml";
}

@for (int i = 0; i < Model.GetLength(0); i++)
{
    <div class="row">
        @for (int j = 0; j < Model.GetLength(1); j++)
        {
            string offset = "col-xs-offset-2";
            bool isCurrent, isNull;
            if (j == 0)
            {
                offset = "col-xs-offset-1";
            }
           
            try
            {
                isNull = Model[i, j].Description.Length < 1;
            }
            catch
            {
                isNull = true;
            }
           
            if (!isNull)
            {
                isCurrent = ViewBag.myType != Model[i, j].ID && cart.CountCart > 0;
                string x = isCurrent ? "true" : "false";
               
                <div class="col-xs-2 @offset" style="height: 75px;">
                    <button type="button" class="btn btn-success" style="height: 100%; width: 100%; white-space: normal;" onclick="if(@x && confirm('You are about to empty your cart')){window.location = '@Url.Action("SelectType", new { @type = Model[i, j].ID })'} else if(!@x){window.location = '@Url.Action("SelectType", new { @type = Model[i, j].ID })'}">
                        @Model[i, j].Description
                    </button>
                </div>
            }
        }
    </div>
}

I know I have to use a  @using (Html.BeginForm with a Hidden Field for the Type. I just don't know how to do this with an array.