1. Put HttpPost attribute over
public ActionResult Displayresult()
2. Create Form Like This
<%using (Html.BeginForm(actionName:"ActionName", controllerName:"controllerName", method:FormMethod.Post))
{%>
Customer Id: <input type="text" name="CustomerId" />
Customer Name: <input type="text" name="Name" />
Amount: <input type="text" name="Amount" />
<input type="submit" value="Click" />
<%}%>
3.Suggestioin: please use cshtml pages and Razor syntex.