void DisplayRecords()
{
tbl_students _student = new tbl_students();
using (SampleEntities db = new SampleEntities())
{
var stud = db.tbl_students.ToList();
dataGridView1.DataSource = stud;
}
}
private void button3_Click(object sender, EventArgs e)
{
tbl_students _student = new tbl_students();
_student.StudentID = txtStudentID.Text;
using (SampleEntities db = new SampleEntities())
{
var stud = db.tbl_students.FirstOrDefault(a => a.StudentID == _student.StudentID);
db.tbl_students.Remove(stud);
db.SaveChanges();
}
MessageBox.Show("Delete Successful");
DisplayRecords();
}
private void button1_Click(object sender, EventArgs e)
{
//ADD
tbl_students _student = new tbl_students();
_student.StudentID = txtStudentID.Text;
_student.FirstName = txtFName.Text;
_student.LastName = txtLName.Text;
_student.MiddleName = txtMName.Text;
using (SampleEntities db = new SampleEntities())
{
db.tbl_students.Add(_student);
db.SaveChanges();
}
MessageBox.Show("Add Successful");
DisplayRecords();
}
private void button2_Click(object sender, EventArgs e)
{
//Update
tbl_students _student = new tbl_students();
_student.StudentID = txtStudentID.Text;
_student.FirstName = txtFName.Text;
_student.MiddleName = txtMName.Text;
_student.LastName = txtLName.Text;
using (SampleEntities db = new SampleEntities())
{
var stud = db.tbl_students.FirstOrDefault(a => a.StudentID == _student.StudentID);
if (stud != null)
{
stud.FirstName = _student.FirstName;
stud.LastName = _student.LastName;
stud.MiddleName = _student.MiddleName;
db.SaveChanges();
}
MessageBox.Show("Update Successful");
DisplayRecords();
}
}
