ASP.NETจะเก็บข้อมูลใน Listbox มาไว้ในฐานข้อมูล Access Database ยังไงครับ

string StrConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:/db3.mdb;Persist Security Info=False";
        OleDbConnection Conn = new OleDbConnection(StrConn);
        OleDbCommand cmd = new OleDbCommand();
        cmd.CommandType = CommandType.Text;

        cmd.CommandText = "insert into datas(ID_name,sum1) Values('" + TextBox1.Text + "','"

            + ??? + "')";

        cmd.Connection = Conn;
        Conn.Open(); 
        cmd.ExecuteNonQuery();
        Conn.Close();
      
        Response.Redirect("Default3.aspx");

	int i = 0;
	TextBox1.Text = "You Selected" + " ";
	for (i = 0; i <= ListBox1.Items.Count - 1; i++) {
		if (ListBox1.Items(i).Selected) {
			TextBox1.Text = TextBox1.Text + ListBox1.Items(i).Text + " ";
		}
	}

		OleDbConnection objConn = new OleDbConnection();
		OleDbCommand objCmd = new OleDbCommand();
		String strConnString,strSQL;

		strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + 
		Server.MapPath("database/mydatabase.mdb") + ";Jet OLEDB:Database Password=;";

		int i = 0;
		for (i = 0; i <= ListBox1.Items.Count - 1; i++) {
			if (ListBox1.Items(i).Selected) {
		
			strSQL = "INSERT INTO customer (XXX) " +
			" VALUES " +
			" ('" + ListBox1.Items(i).Text + "')";
			objConn.ConnectionString = strConnString;
			objConn.Open();
			objCmd.Connection = objConn;
			objCmd.CommandText = strSQL;
			objCmd.CommandType = CommandType.Text;

				}
		}	

		this.pnlAdd.Visible = false;
	
		try
		{
			objCmd.ExecuteNonQuery();
			this.lblStatus.Text = "Record Inserted";
			this.lblStatus.Visible = true;
		}
		catch (Exception ex)
		{
			this.lblStatus.Visible = true;
			this.lblStatus.Text = "Record can not insert Error ("+ ex.Message +")";
		}

		objConn.Close();
		objConn = null;