OnPreRender med masterpages

præcis ganske korrekt, så derfor du skal bruge page_prerender :=)

CSharp kode 

 <asp:Content ID="CONT_Head" ContentPlaceHolderID="CPH_head" runat="server">
     <style type="text/css">
         .style2
         {
             width: 150px;
         }
         .GreenRow
         {
             background-color: #e1ffaa;
         }
     </style>
     <meta http-equiv="refresh" content="5">
 </asp:Content>
 <asp:Content ID="CONT_Content" ContentPlaceHolderID="PHMainContent" runat="server">
     <h1>
         Kontaktanmodning</h1>
     <div>
         <span id="txtIntro" runat="server">Intro tekst</span>
         <br />
 <span id="txtTimeout" runat="server" visible="false">Din "timeslot" for at få vist de
             tilgængelige data er udløbet. Prøv venligst igen.<br />
         </span>
         <span id="txtInvisible" runat="server" visible="false">Invisible</span>
         <span id="txtVisible" runat="server">Visible</span>
         <br />
         <asp:Button ID="cmdRequest" runat="server" Text="Anmod" 
             onclick="cmdRequest_Click" />
     </div>

CSharp kode 

 protected override void OnPreRender(EventArgs e)
         {
 string code = Request.QueryString["code"];
             string expired = Request.QueryString["Expired"];
             //If expired add an header so it will refresh
             if (expired != null)
             {
                 txtTimeout.Visible = true;
                 Response.AppendHeader("Refresh", "5;URL=KontaktOplysninger.aspx");
             }
 
             if (code != null)
             {
                 string seconds = code.Substring(0, 2);
                 string date = code.Substring(2, 2);
                 string year = code.Substring(4, 4);
                 string message = code.Substring(8, 12);
                 string hour = code.Substring(20, 2);
                 string month = code.Substring(22, 2);
                 string minutes = code.Substring(24, 2);
                 string complete = seconds + date + year + message + hour + month + minutes;
 
                 //hvis jeg har fået de rigtige dele ud korrekt bør de give samme resultat og så det korrekt
                 //Så kan jeg udvide mine kriterier med alt muligt.
                 if (complete.Equals(code))
                 {
                     TimeSpan difference = DateTime.Now.Subtract(new DateTime(int.Parse(year), int.Parse(month), int.Parse(date), int.Parse(hour), int.Parse(minutes), int.Parse(seconds)));
                     //7 sekunder er for testpurpose
                     if (difference.Seconds < 17)
                     {
                         txtInvisible.Visible = true;
                         txtVisible.Visible = false;
                         cmdRequest.Visible = false;
                     }
                     else
                     {
                         Response.Redirect("KontaktOplysninger.aspx?Expired=true");
                     }
                     //txtIntro.InnerText += "    DIFFERENCE " + difference.ToString();
                 }
             }
 
             base.OnPreRender(e);
         }
 
 protected void cmdRequest_Click(object sender, EventArgs e)
         {
             System.Text.StringBuilder url = new System.Text.StringBuilder("KontaktOplysninger.aspx?code=");
             url.Append(DateTime.Now.ToString("ss"));   //seconds
             url.Append(DateTime.Now.ToString("dd"));   //date
             url.Append(DateTime.Now.ToString("yyyy")); //year
             url.Append("Al1owd4Axccs");                //code
             url.Append(DateTime.Now.ToString("HH"));   //hours
             url.Append(DateTime.Now.ToString("MM"));   //month
             url.Append(DateTime.Now.ToString("mm"));   //minutes
 
             Response.Redirect(url.ToString());
         }