private void btnimport_Click(object sender, EventArgs e) { NhapXuatDuLieu nhapDL = new NhapXuatDuLieu(); nhapDL.OnImport += new NhapXuatDuLieu.OnImportHandler(updateAll); nhapDL.NhapDuLieu(); }
private void btnexport_Click(object sender, EventArgs e) { NhapXuatDuLieu xuatDL = new NhapXuatDuLieu(); xuatDL.xuatDuLieu(); }