ViewModel is not persisting database value

umair mohsin

7y896.NET

i have populated one of my view with this viewmodel

public ActionResult AddStudent(int id)

{

var record = (from x in db.Registers

where (x.RegisterId == id)

select new StudentModel()

{

Batch = x.Batch,

ClassRoll = x.RoleNo,

Department = x.Department,

Name = x.StudentFullName

}).ToList();

return View(record);

}

these values are coming from database and persist on viewmodel to display but the problem is

[HttpPost]

[ValidateAntiForgeryToken]

public ActionResult AddStudent(StudentModel s)

{

Student stu = new Student();

s.LibraryCardNo = stu.LibraryCardNo;

s.Name = stu.Name;

s.Department = stu.Department;

s.Batch = stu.Batch;

s.ClassRoll = stu.RollNo;

db.Students.Add(stu);

ViewBag.Msg = "Record Inserted";

return View();

}

when this viewmodel is sent back to processing t

hese values are empty i don't know how to fix this thing.please help me

2 Replies

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Vincent Maverick Durano7y ago
That's because you didn't return your ViewModel back to your View. You should have somethinng like this:
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult AddStudent(StudentModel s)
{
Student stu = new Student();
s.LibraryCardNo = stu.LibraryCardNo;
s.Name = stu.Name;
s.Department = stu.Department;
s.Batch = stu.Batch;
s.ClassRoll = stu.RollNo;
db.Students.Add(stu);
ViewBag.Msg = "Record Inserted";

//here we return the StudentModel
return View(s);
}
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umair mohsin7y ago
viewmodel is made from scaffolding using the same StudentModel passing ienumerable