public bool IsBoxAllowTally(string strBoxNo) { BTallyBillDetailBB tallyBillDetailBB = new BTallyBillDetailBB(); try { DataTable dt = new DataTable(); dt = tallyBillDetailBB.GetList("boxNo='" + strBoxNo + "'").Tables[0]; return dt.Rows.Count > 0 ? false : true; } finally { tallyBillDetailBB.Dispose(); } }