private void button1_Click(object sender, EventArgs e)
        {
            this.Hide();
            AddSub f2 = new AddSub();

            f2.Show();
        }
        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            string colName = dataGridView1.Columns[e.ColumnIndex].Name;

            if (colName == "colEdit")
            {
                AddSub frm = new AddSub();
                frm.button1.Enabled     = false;
                frm.button2.Enabled     = true;
                frm.textBox1.Text       = _code;
                frm.textBox2.Text       = _name;
                frm.textBox3.Text       = _year;
                frm.radioButton1.Text   = _sem;
                frm.radioButton2.Text   = _sem;
                frm.numericUpDown1.Text = _lechrs;
                frm.numericUpDown2.Text = _tutorialhrs;
                frm.numericUpDown3.Text = _labhrs;
                frm.numericUpDown4.Text = _evalutionhrs;
                frm.ShowDialog();
            }
            else if (colName == "colDelete")
            {
                if (MessageBox.Show("Are you sure you want to delete this record ?", "Delete Record", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                {
                    ;
                }
                {
                    cn.Open();
                    cm = new MySqlCommand("delete from tblsubject where code like'" + _code + "'", cn);
                    cm.ExecuteNonQuery();
                    cn.Close();
                    MessageBox.Show("Record has been Successfully deleted !", "Deleted Record", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    LoadRecord();
                }
            }
        }