Hi, I have a few problems with listview:

1) I want to select an item in the listview which later I need to remove an amount of the item from the listview. Let's say I selected Raw Material with an amount of 200. I click "Remove" button and remove 100 unit from the Raw Material. How do I actually do this?

2) I notice that when I select the item in the listview, it allows me to rename the item. What can I do to prevent the user from doing the same thing?

Please help. Thanks