private void deleteBT_Click(object sender, EventArgs e) // This method run when deleteBT clicked
{
try // Holding errors
{
using (SchoolDatabaseEntities schoolDatabase = new SchoolDatabaseEntities()) // Create temporary object of SchoolDatabaseEntities
{
var entry = schoolDatabase.Entry(students); // This variable store information about current state of entry on object
if (entry.State == EntityState.Detached) // If state is detached
{
schoolDatabase.students.Attach(students); // Ataching student object to table
}
schoolDatabase.students.Remove(students); // Removeing students object from table
schoolDatabase.SaveChanges(); // Saveing changes
refreshDataGridView(); // Refreshing DataGridView with students
clear(); // Run clear method
}
MessageBox.Show("Removeing record successfull !", "Entity Inforamtion", // Inform user about successfull inserting record
MessageBoxButtons.OK, MessageBoxIcon.Information); // Set buttons and icon for messagebox
}
catch (Exception exception) // If some error become
{
MessageBox.Show("Error, contact system admin ! \n" + exception.ToString(), "Entity Error", // Inform user about some error
MessageBoxButtons.OK, MessageBoxIcon.Error); // Set buttons and icon for messagebox
}
}
private void saveBT_Click(object sender, EventArgs e) // This method run when saveBT clicked
{
try // Holding errors
{
students.name = nameTB.Text.Trim(); // Set value of name as a nameTB.Text
students.surname = surnameTB.Text.Trim(); // Set value of surname as a surnameTB.Text
students.age = Convert.ToInt32(ageTB.Text.Trim()); // Set value of age as a ageTB.Text
students.@class = classTB.Text.Trim(); // Set value of class as a classTB.Text
students.address = addressTB.Text.Trim(); // Set value of address as a addressTB.Text
using (SchoolDatabaseEntities schoolDatabase = new SchoolDatabaseEntities()) // Create temporary object of SchoolDatabaseEntities
{
schoolDatabase.Entry(students).State = EntityState.Modified; // Modify the current record
schoolDatabase.SaveChanges(); // Saving changes
}
clear(); // Run clear method
refreshDataGridView(); // Refreshing DataGridView with students
MessageBox.Show("Updateing record successfull !", "Entity Inforamtion", // Inform user about successfull inserting record
MessageBoxButtons.OK, MessageBoxIcon.Information); // Set buttons and icon for messagebox
}
catch (Exception exception) // If some error become
{
MessageBox.Show("Error, contact system admin ! \n" + exception.ToString(), "Entity Error", // Inform user about some error
MessageBoxButtons.OK, MessageBoxIcon.Error); // Set buttons and icon for messagebox
}
}
public ActionResult Edit([Bind(Include = "Id,Name")] Teacher teacher)
{
if (ModelState.IsValid)
{
db.Entry(teacher).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("Index"));
}
return(View(teacher));
}
public ActionResult Edit([Bind(Include = "Id,Name,TeacherId")] Course course)
{
if (ModelState.IsValid)
{
db.Entry(course).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("Index"));
}
ViewBag.TeacherId = new SelectList(db.Teachers, "Id", "Name", course.TeacherId);
return(View(course));
}
public ActionResult Edit([Bind(Include = "Id,Name,CourseId")] Assignment assignment)
{
if (ModelState.IsValid)
{
db.Entry(assignment).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("Index"));
}
ViewBag.CourseId = new SelectList(db.Courses, "Id", "Name", assignment.CourseId);
return(View(assignment));
}
public ActionResult Edit([Bind(Include = "Id,StudentId,CourseId")] StudentCourse studentCourse)
{
if (ModelState.IsValid)
{
db.Entry(studentCourse).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("Index"));
}
ViewBag.CourseId = new SelectList(db.Courses, "Id", "Name", studentCourse.CourseId);
ViewBag.StudentId = new SelectList(db.Students, "Id", "Name", studentCourse.StudentId);
return(View(studentCourse));
}
