Store the ListBox2 items
===

In my Web Page, I have 2 List Boxes namely ListBox1,ListBox2.The user select the list of items from ListBox1 and move it to ListBox2.**I done up to this**, but after i click the 'SAVE' button, it is not save the ListBox2 selected item in the SQL table and It is not throw error!! how to store it ?

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
             lblPage1ID.Text=Server.UrlDecode(Request.QueryString["Parameter"].ToString());
             ListBoxWorksPackages();
            }
        }

        protected void ListBoxWorksPackages()
        {
            ListBox1.Items.Add("General Contractor");
            ListBox1.Items.Add("Architecture");
            ListBox1.Items.Add("Civil");
            ListBox1.Items.Add("Mechanical");
            ListBox1.Items.Add("Electrical");
        }

        protected void btnMoveRight1_Click(object sender, EventArgs e)
        {
            for (int i = ListBox1.Items.Count - 1; i >= 0; i--)
            {
                if (ListBox1.Items[i].Selected == true)
                {
                    ListBox2.Items.Add(ListBox1.Items[i]);
                    ListItem li = ListBox1.Items[i];
                    ListBox1.Items.Remove(li);
                }
            }
        }

        protected void btnMoveLeft1_Click(object sender, EventArgs e)
        {
            for (int i = ListBox2.Items.Count - 1; i >= 0; i--)
            {
                if (ListBox2.Items[i].Selected == true)
                {
                    ListBox1.Items.Add(ListBox2.Items[i]);
                    ListItem li = ListBox2.Items[i];
                    ListBox2.Items.Remove(li);
                }
            }
        }

        protected void BtnSave1_Click(object sender, EventArgs e)
        {
            SqlConnection SqlCon = new SqlConnection(GetConnectionString());
                       
            string Packagevalues = string.Empty;
            foreach (ListItem item in ListBox2.Items)
            {
                if (item.Selected == true)
                {
                   Packagevalues += "," + item.Text; 
                }
            }

            string query = "INSERT INTO Contractor_Info2 (Vendor_ID,WorksPackage) VALUES"
                               + "(@Vendor_ID,@WorksPackage )";

            try
            {
                SqlCommand cmd = new SqlCommand(query, SqlCon);
                cmd.CommandType = CommandType.Text;

                SqlCon.Open();

                cmd.Parameters.AddWithValue("@Vendor_ID", lblPage1ID.Text);
                cmd.Parameters.AddWithValue("@WorksPackage", Packagevalues);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
            finally
            {
                SqlCon.Close();
            }
        }
