private void btnHienThi_Click(object sender, EventArgs e)
{
//string sql = "select * from lop, khoa where Lop.MaKhoa=Khoa.MaKhoa and Lop.MaKhoa='" + cbKhoa.SelectedValue + "'";
string sql = "SELECT * FROM LOP, KHOA WHERE LOP.MaKhoa = KHOA.MaKhoa AND LOP.MaKhoa = '" + cbKhoa.SelectedValue + "'";
CrystalReportLop crtLop = new CrystalReportLop();
UtilityDB data = new UtilityDB();
crtLop.SetDataSource(data.getDataInTable(sql));
rpvLop.ReportSource = crtLop;
rpvLop.Refresh();
}
