private void LoadExtAccountInHiaraky() { DataTable tb = MyAccount.GetAccountList(Program.AccountStatic.CompanyID, 1, 0); DataTable subtb = MyAccount.GetSubAccountList(Program.AccountStatic.CompanyID, 1); DataSet dsDataset = new DataSet(); try { dsDataset.Tables.Add(tb); dsDataset.Tables.Add(subtb); DataRelation Datatablerelation = new DataRelation("Sub Account", dsDataset.Tables[0].Columns[0], dsDataset.Tables[1].Columns[1], false); dsDataset.Relations.Add(Datatablerelation); HanchyGrid.DataSource = dsDataset.Tables[0]; } catch (Exception ex) { } }