// GET: StudentInfoes/Edit/5
public ActionResult Edit(int?id)
{
if (id == null)
{
return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
}
var studentInfo = _studentBl.GetStudentById(id);
if (studentInfo == null)
{
return(HttpNotFound());
}
var vm = _studentBl.EditStudent(studentInfo);
ViewBag.GradeId = new SelectList(_gradeBl.GetGrades(), "Id", "ClassName", studentInfo.GradeId);
return(View(vm));
}