private void customDataGridView1_CellEnter(object sender, DataGridViewCellEventArgs e) { ServerModule.IInvoiceServer serviceInvoice = ServerModule.ServerModuleFactory.GetServerModule <ServerModule.IInvoiceServer>(); if (customDataGridView1.CurrentRow == null) { return; } customDataGridView2.DataSource = serviceInvoice.GetGoodsInfo(customDataGridView1.CurrentRow.Cells["入库单号"].Value.ToString()); }