private void btnTimkiem_Click(object sender, EventArgs e) { DataSet ds; dtKhachHang = new DataTable(); dtKhachHang.Clear(); if (rdoMaKH.Checked == true) { ds = dbKH.TimkiemTheoMaKH(this.txtTimkiem.Text); } else { if (rdoTen.Checked == true) { ds = dbKH.TimkiemTheoTEN(this.txtTimkiem.Text); } else { ds = dbKH.TimkiemTheoGT(this.txtTimkiem.Text); } } dtKhachHang = ds.Tables[0]; dgvKH.DataSource = dtKhachHang; dgvKH.AutoResizeColumns(); }