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

// This event is raised for the header, the footer, separators, and items.

        protected void R1_ItemDataBound(Object Sender, RepeaterItemEventArgs e)

        {

            // Execute the following logic for Items and Alternating Items.

            if (e.Item.ItemType == ListItemType.Item ||

                e.Item.ItemType == ListItemType.AlternatingItem)

            {

                if (((Evaluation)e.Item.DataItem).Rating == "Good")

                {

                    ((Label)e.Item.FindControl("RatingLabel")).Text = "<b>***Good***</b>";

                }

            }

        }

(or)

        protected void rptMyReteater_ItemDataBound(object sender, RepeaterItemEventArgs e)

        {

            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)

            {

                Button b = e.Item.FindControl("myButton") as Button;

                DataRowView drv = e.Item.DataItem as DataRowView;

                b.CommandArgument = drv.Row["ID_COLUMN_NAME"].ToString();

            }

        }

(OR)

protected void rpt_rooms_ItemDataBound(object sender, RepeaterItemEventArgs e)

        {

            try

            {

                if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)

                {

                    Label roomid = (Label)e.Item.FindControl("Label1");

                    Label room_type_id = (Label)e.Item.FindControl("Label2");

                    GridView gvreply = e.Item.FindControl("gvreply") as GridView;

                    gvreply.DataSource = dt;

                    gvreply.DataBind();

                    DataList dl_gallery = e.Item.FindControl("dl_gallery") as DataList;

                    dl_gallery.DataSource = dt3;

                    dl_gallery.DataBind();

                     DropDownList ddl_extra_beds = e.Item.FindControl("ddl_extra_bed") as DropDownList;

                }

            }

            catch (Exception ex)

            {

                lblerror.Visible = true;

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

                lblerror.Text = ex.Message;

            }

        }