Retrieving data from database using multiple items from listbox and showing on another listbox

Question

Hello All,

I am newbie , am stuck in middle of the coding. I want to retrieve data from sql database when i am selecting mulitple items from listbox and showing on another listbox in vb.net.

My code only retrieving only one item from listbox and retrieve data from database and showing on another listbox. I am attaching my code with this mail.

Please help me out!