Gridview Count INput

<asp:TemplateField HeaderText="Organization">

                       <ItemTemplate>

                           <asp:Label ID="Label1" runat="server" Text='<%#GetORGName(Convert.ToString(DataBinder.Eval(Container.DataItem, "org_id", ""))) %>'></asp:Label>

                       </ItemTemplate>

                   </asp:TemplateField>

public String GetORGName(string org_id)
   {
       if (org_id == null || org_id == "")
       {
           return "No Organization";
       }
       else
       {

           int org = Convert.ToInt32(org_id);
           string sql = "SELECT * FROM p2p_v2_registration WHERE org_id=" + org + "";
           SqlDataAdapter ad = new SqlDataAdapter(sql, con);
           DataTable dt = new DataTable();
           ad.Fill(dt);

           return dt.Rows[0]["organization"].ToString().Trim();
       }