Quantity of Stock in List View

Here i have a listview of my Products, QuantityTxt(shown in image) is a text not Textbox, when i click on AddButton(Shown in image) so i want that QuantityTxt should increase to 2 for this Product in listview; can anyone help me doing this ?

Show Your Blocks

Do like this

When Any buttton or carview click

Use this block