How to access datasource(label,textbox,etx.) fields in an ASP.NET Repeaters ItemCommand event?

protected void rpt_rooms_ItemCommand(object source, RepeaterCommandEventArgs e)

        {

            try

            {

                if (e.CommandName == "book")

                {

                    DropDownList ddl_age_ = e.Item.FindControl("ddl_age") as DropDownList;

                    string abc = ddl_age_.SelectedValue;

                }

            }

            catch (Exception ex)

            {

                lblerror.Visible = true;

                lblerror.ForeColor = System.Drawing.Color.Red;

                lblerror.Text = ex.Message;

            }

        }