+1  A: 

After breaking my head over the wall, I actually found a way. I will post it here, so maybe somebody with the similar problem will find solution for himself.

That is my button that located in the ListView

<asp:Button ID="orderbook" runat="server" CommandName="order" CommandArgument="ordernow" OnCommand="Order_Command" Text="order now" />

And in code behind i added

protected void Order_Command(object sender, CommandEventArgs e)
    {
        if (e.CommandName == "order")
        {
            testLabel.Text = e.CommandName.ToString();
        }
    }

And now when i click on the button, it catches the event.