Web Forms :: Listbox.Selected - Duplicate Item Error

Nov 4, 2010

I have built one of those 2 listbox things where the items in the left textbox can be selected and moved to the right list box. The items in the list can be thought of as tasks (like Raise Invoice, Call Client, Deliver goods etc) The rules of this are that the item you move to the right box remains in the left box. Reason being, you are allowed to add the same item from the left to right as many times as you like. An example what the list on the right might look like is this.

Raise Invoice
Call Client
Deliver Goods
Installation
Call Client
Finalize Deal

Now I have added the feature to select an item on the right and hit the UP button, to move it up in the list. For example I could select 'Deliver Goods' and hit the up button. (the down button works as expected)

Raise Invoice
Deliver Goods
Call Client
Installation
Call Client
Finalize Deal

If i select the 2nd instance of Call Client and hit the up button,

Raise Invoice
Call Client
Deliver Goods
Installation
Call Client
Finalize Deal

This is what happens.

Raise Invoice
Call Client
Deliver Goods
Installation
Call Client
Finalize Deal

My code that loops though and does the move relies on the item.selected property to find which on I have selected. (obviously)

[Code]....

Despite having the items at the bottom of the list selected, the .Selected property is true on the first instance of the item that happens to have the same .Text and .Value.

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