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Can't access dynamicly created textbox in AJAX postback.

Posted By:      Posted Date: September 20, 2010    Points: 0   Category :ASP.Net
 

I have a script which creates a dynamic textbox (and more) in an AJAX async post back. But when I try to acess the textbox I am told "Object reference not set to an  instance of an object". I have been strugleing with this for a long time and can not get it to work so please help me. This is written in C# .Net 4. The line causing the problem is the very last one where I have tbGameName.Text.Trim()

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class GameInformation_AddUpcomingRelease : System.Web.UI.Page
{
    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
        string v = this.Request.Params.Get(this.ddlAmountToAdd.UniqueID);

        string[] Regions = { "USA", "Japan", "Europe", "Other" }; //Create a string array of regions.
        string[] Platforms = { "PlayStation 3", "X-Box 360", "Wii", "Computer", "PSP", "Other" }; //Create a string array of platforms

        CreateControlSet(1, Regions, Platforms); //Generate the first Control Set

        if (!string.IsNullOrEmpty(v))
        {
            for (byte i = 2; i <= Convert.ToByte(v); i++)
            {
                //Add a


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