private void delstu_Click(object sender, EventArgs e)
{
if (dataGridstudent.SelectedCells.Count != 0)
{
int rw = dataGridstudent.SelectedCells[0].RowIndex;
string cmd = string.Format("DELETE FROM Student where Id = '{0}'", dataGridstudent.Rows[rw].Cells["Id"].Value.ToString());
SqlCommand del = new SqlCommand(cmd, DatabaseConnection.getInstance().getConnection());
int count = del.ExecuteNonQuery();
students s = new students();
this.Hide();
s.Show();
}
}
