//insert new instructor
private void Add_button(object sender, EventArgs e)
{
try
{
using (Online_Exame ent = new Online_Exame())
{
//ent.NewInstructor(textBox1.Text, textBox2.Text, int.Parse(comboBox1.Text));
Instractor ins = new Instractor();
ins.Dept_id = int.Parse(comboBox1.Text);
ins.Ins_fname = textBox1.Text;
ins.Ins_lname = textBox2.Text;
ent.Instractors.Add(ins);
ent.SaveChanges();
Loadinstructor();
MessageBox.Show("Added Successfully");
comboBox1.Text = comboBox2.Text = textBox1.Text = textBox2.Text = string.Empty;
}
}
catch (FormatException)
{
MessageBox.Show("Please complete the information");
}
}
//delete instructor
private void delete_button(object sender, EventArgs e)
{
try
{
int insId = (int)comboBox2.SelectedItem;
using (Online_Exame ent = new Online_Exame())
{
// ent.deleteInstructor(insId);
int ins_id = int.Parse(comboBox2.Text);
Instractor ins = ent.Instractors.Find(ins_id);
ent.Instractors.Remove(ins);
ent.SaveChanges();
Loadinstructor();
comboBox1.Text = comboBox2.Text = textBox1.Text = textBox2.Text = string.Empty;
}
MessageBox.Show("Deleted Successfully");
}
catch (NullReferenceException)
{
MessageBox.Show("Incorrect ID");
}
}