01.string strProduct = textProduct.text ;
02.string strQty = textQty.text;
03.
04.if (listview1.items.count !=0)
05.{
06.for(int i=0;i<listview1.items.count;i++)
07.{
08.if (strProduct == listview1.items[i].subitems["product"].text)
09.{
10.listview1.items[i].subitems["Qty"].text = convert.toint32(listview1.items[i].subitems["Qty"].text) + convert.toint32(strQty);
11.return;
12.}
13.else
14.{
15.
16.
17.}
18.}
19.}else{
20.
21.
22.}
