How Can I Run ASP.NET Controller?

Question

I'm trying to make a registry system. I need to access the values entered by the user from Inputs. I made a controller for this.

My codes:

addClass.cshtml:

@page
@model AddClassPage
@{
    ViewData["Title"] = "Add Student";
}
@using (Html.BeginForm()) ;

<div class="p-3 mb-2 bg-dark text-white">
    <h2 class="display-4">Add Class</h2>
</div>
<form>
  <div class="form-group">
    <label for="teacherIdInput">Class ID (number only):</label>
    <input type="number" class="form-control" min="0" name="classId" placeholder="Class ID">
  </div>
  <div class="form-group">
    <label for="teacherNameInput">Class Name:</label>
    <input type="text" class="form-control" name="className" placeholder="Class Name">
  </div>
  <button type="submit" class="btn btn-success" name="addButton">Add</button>
</form>

<div>
</div>

AddClassController.cs:

using Microsoft.AspNetCore.Mvc;
using System;

namespace StudentWebAppController {
    public class AddClassController : Controller
    {
        [HttpGet]
        public ActionResult Index()
        {
            return View();
        }
        [HttpPost]
        public ActionResult Index(int classId, string className)
        {
            return View();
        }

    }
}

I've been coding watching a video on YouTube and I've coded exactly the same. But it's not working for me.

After sumbiting from the site:

As you can see, the value entered by the user after sumbiting from the site is not passed into the argument. But in the video I watched, it is transmitted and the value entered by the user can be accessed. What's wrong with my code?

Check the form tags, you probably have two. And you probably need action and method tags also. Like <form action="/Controller/Method" method="Post"> — MonkeyDLuffy
And check the video again, your code is different from the video :) @@using (Html.BeginForm()) {htmlCode} — MonkeyDLuffy

Amir Nisinzweig Amir Nisinzweig · Accepted Answer · 2022-07-28T20:37:25

Change the view code to this :

@model AddClassPage
@{
    ViewData["Title"] = "Add Student";
 }


<div class="p-3 mb-2 bg-dark text-white">
    <h2 class="display-4">Add Class</h2>
</div>

@using (Html.BeginForm(FormMethod.Post, "Index", "AddClass", "AddClass")) {
  <div class="form-group">
    <label for="teacherIdInput">Class ID (number only):</label>
    <input type="number" class="form-control" min="0" name="classId" placeholder="Class ID">
  </div>
  <div class="form-group">
    <label for="teacherNameInput">Class Name:</label>
    <input type="text" class="form-control" name="className" placeholder="Class Name">
  </div>
  <button type="submit" class="btn btn-success" name="addButton">Add</button>
}

How Can I Run ASP.NET Controller?

2 Answers