private void txtSearch_TextChanged(object sender, EventArgs e)
{
if (txtSearch.Text != "")
{
if (cLogin.search == 0)
{
dataGridView1.DataSource = db.SearchDSMaSach(txtSearch.Text);
}
else if (cLogin.search == 1)
{
dataGridView1.DataSource = db.SearchDSTua(txtSearch.Text);
}
else
{
dataGridView1.DataSource = db.SearchDSMaNXB(txtSearch.Text);
}
}
else
{
LoadData();
}
}