private void btn_Search_Click(object sender, EventArgs e)
{
dataGridView1.DataSource = ctr.Load();
string recordOld = (dataGridView1.Rows.Count - 1).ToString();
dataGridView1.DataSource = ctr.Search(textBox_Search.Text);
string recordNew = (dataGridView1.Rows.Count - 1).ToString();
label_CountRecord.Text = recordNew + "/" + recordOld;
}