Save functionality does not work

Hi Team

I want to make my save functionality to work, but it does not keep any record to my table and need some help. In summary what i want here is when a user creates a course, the coursename must stored to the table as raw data, so can see it to the course dashboard. Mine does not keep any record, here my logic below;

[Route("Home/CoursesRegistration")]
public ActionResult CoursesRegistration( eNtsaRegCourses collection)
{
if(ModelState.IsValid)
{
cb.SaveChanges();
return RedirectToAction("Courses", "Home");
}
return View(collection);
}
//GET://Courses/Courses-All.
[Route("Home/Courses")]
public ActionResult Courses(string g) // This method must keep those record, when user register the course-name.
{
return View(g);
}
// Model
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.Entity;
using eNtsaRegistrationTraining.Models;
namespace eNtsaRegistrationTraining.DAL
{
public class eNtsaRegCourses:DbContext
{
public eNtsaRegCourses(): base("eNtsaRegCourses")
{
}
public DbSet eNtsaCourse { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
Database.SetInitializer(null);
base.OnModelCreating(modelBuilder);
}
}
}
// Model
// db-schema lists.
public class eNtsaCourses
{
[Key]
public Guid? Id { get; set; }
public string Course { get; set; }
public string Nickname { get; set; }
public string Term { get; set; }
public string EnrolledAs { get; set; }
public bool Published { get; set; }
}

// View
class="modal-footer">
"button" class="btn btn-secondary" data-dismiss="modal">Cancel
class="btn btn-large btn-success" id="fire" href="@Url.Action("CoursesRegistration", "Home")">Create Courses
"text/javascript" src="~/Scripts/jquery-3.4.1.js">
"text/javascript">
$('#fire').on('click', function (e) {
var url = '@Url.Action("CoursesRegistration", "eNtsaCourses")';
$(jQuery.noConflict);
$('#ModalContent').load(url, function (html) {
var form = $("#Modal-eNtsaCourses form");
$.validator.unobtrusive.parse(form);
$("#Modal-eNtsaCourses").modal('show');
form.submit(function () {
$.ajax({
url: this.action,
type: this.method,
data: $(this).serialize(),
success: function (result) {
$('#Modal-eNtsaCourses').modal('hide');
var content = '@Url.Action("Courses", "eNtsaCourses")';
$('#ViewCourses').load(content);
}
});
return false;
});
});
});

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Salman Beg6y ago
System.NullReferenceException: 'Object reference not set to an instance of an object.' means somewhere you are getting the object null and due to that reason it is throwing exception. So you need to check exactly where you are getting null. Thanks.
Guest User6y ago
Salman the error is here

var url = '@Url.Action("CoursesRegistration", "eNtsaCourses", new {@Model.CourseName})';
System.NullReferenceException: 'Object reference not set to an instance of an object.'
Salman Beg6y ago
Hi.
Check whether you are getting error or not. Also put try catch block so that easily you can catch error if any.
Thanks.