How To Insert List Box Items In One Column

Here is my code which insert listbox items table and create record.

protected void Button1_Click(object sender, EventArgs e)
{
ListItem li = new ListItem();
System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection();
conn.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;" + @"Data source= C:Ruchitaweb" + @"WebSite527afcergonomic.mdb";
conn.Open();
for (int i = 0; i < ListBox1.Items.Count; i++)
{
li.Text = ListBox1.Items[i].Text;
}
OleDbCommand cmd = new OleDbCommand("insert into record(recorditem) values('" + li.Text + "')", conn);
cmd.ExecuteNonQuery();
conn.Close();
}

this is inserting in diffrent rows but i want this in one row with (,)so i can parse it and get it back which items user selected. and i also want to show messge box that show the record number.