Hi guys, problem with dynamic controls into xml file

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C#

XML

.NET

Hi i have a big problem getting values from my danymaic control into an xml file.

my onclick button event can not fin the controls.

asp

<asp:Table CssClass="table table-responsive" ID="tabl" runat="server"></asp:Table>

C#

protected void Page_Load(object sender, EventArgs e)
    {

        CreateControls();

        if (!IsPostBack)
        {
            CreateControls();

        }
    }




    private void CreateControls()
    {
        string path = Server.MapPath("../xmlReDriverListToday/" + Request.QueryString["WebPrefix"] + Request.QueryString["UserName"] + "DriverSteps.xml");

        
        XmlDocument xmlDokument = new XmlDocument();
        xmlDokument.Load(path);


        var nodeList = xmlDokument.SelectNodes("DriverStepChecks/StepChecks/Check");


        TableRow tblrow;
        TableCell tblTextCheckBox;
        TableCell tblTypeHidden;
        TableCell tblText;
        TableCell tblcellPrice;
        TableCell tblcellStatus;
        TableCell tblcellType;
        TableCell cellKr;
      
        TextBox txtbx;
        CheckBox chkbx;

        HiddenField hdnType;


        Label textCHkBoxTextBox;
        Label lblTekst;
        Label lblPrice;
        HiddenField lblStatus;
        Label lblKr;
       

        for (int i = 0; i < nodeList.Count; i++)
        {
            XmlNode NodeR = nodeList[i];


            string txt = NodeR["Text"].InnerText;



            string txtPrice = NodeR["Price"].InnerText;

            string txtType = NodeR["Type"].InnerText;

            string status = NodeR["ReqCheck"].InnerText;
          

            tblrow = new TableRow();
            for (int j = 0; j < 1; j++)
            {
                tblTextCheckBox = new TableCell();
                tblTextCheckBox.Attributes.Add("class", "col-md-1");

                //Typen CHeckBox eller TekstBox
                tblcellType = new TableCell();
                textCHkBoxTextBox = new Label();
                textCHkBoxTextBox.ID = "Type" + i;
                textCHkBoxTextBox.Attributes.Add("style", "");

                if (txtType.ToString() == "text")
                {
                    textCHkBoxTextBox.Text = txtType;
                    txtbx = new TextBox();
                    txtbx.ID = "txt" + i;
                    txtbx.Attributes.Add("class", "form-control");
                    tblTextCheckBox.Controls.Add(txtbx);
                }
                else
                {
                    textCHkBoxTextBox.Text = txtType;
                    chkbx = new CheckBox();
                    chkbx.ID = "txt" + i;
                    chkbx.Attributes.Add("class", "");
                    tblTextCheckBox.Controls.Add(chkbx);
                }


                tblTypeHidden = new TableCell();
                hdnType = new HiddenField();
                hdnType.Value = txtType;
                hdnType.ID = "hdnType" + i;

                //Checkbox/Textbox tekst
                tblText = new TableCell();
                lblTekst = new Label();
                lblTekst.Text = txt;
                tblText.Attributes.Add("class", "col-md-3");
                tblText.Attributes.Add("style", "text-align:left;");
               
                //Prisen
                tblcellPrice = new TableCell();
                lblPrice = new Label();
                lblPrice.Text = txtPrice;
                lblPrice.Attributes.Add("style", "text-align:left;");
                tblcellPrice.Attributes.Add("class", "col-md-1");
                tblcellPrice.Attributes.Add("style", "text-align:right;");

                //Tekst kr
                cellKr = new TableCell();
                lblKr = new Label();
                lblKr.Text = "&nbsp;&nbsp;&nbsp;&nbsp;kr";
                cellKr.Attributes.Add("class", "col-md-1");

                //true or false
                tblcellStatus = new TableCell();
                lblStatus = new HiddenField();
                lblStatus.Value = status;
                lblStatus.ID = "reqCheck" + i;
                tblcellStatus.Attributes.Add("class", "col-md-3");
                tblcellStatus.Attributes.Add("style", "text-align:left;");
                

                //mine cells
                tblcellType.Controls.Add(textCHkBoxTextBox);
                tblTypeHidden.Controls.Add(hdnType);
                tblText.Controls.Add(lblTekst);
                tblcellPrice.Controls.Add(lblPrice);
                tblcellStatus.Controls.Add(lblStatus);
                
                cellKr.Controls.Add(lblKr);
             
                //mine ROWS
                tblrow.Cells.Add(tblTextCheckBox);
                tblrow.Cells.Add(tblTypeHidden);
                tblrow.Cells.Add(tblText);
                tblrow.Cells.Add(tblcellPrice);
                tblrow.Cells.Add(cellKr);
                tblrow.Cells.Add(tblcellStatus);
               
                
            }
            
            tabl.Rows.Add(tblrow);

        }


    

    }

    protected void btnChecks_Click(object sender, EventArgs e)
    {

        XmlDocument doc = new XmlDocument();
        XmlNode docNode = doc.CreateXmlDeclaration("1.0", "UTF-8", null);
        doc.AppendChild(docNode);

        XmlNode UpdateCheck = doc.CreateElement("DriverStepsUpdateRequest");
        doc.AppendChild(UpdateCheck);

        XmlNode RecordNode = doc.CreateElement("RecordType");
        RecordNode.AppendChild(doc.CreateTextNode("DriverStepsUpdate"));
        UpdateCheck.AppendChild(RecordNode);


        XmlNode dateFormatNode = doc.CreateElement("DateFormat");
        dateFormatNode.AppendChild(doc.CreateTextNode("DDMMYYYY"));
        UpdateCheck.AppendChild(dateFormatNode);

        XmlNode comNode = doc.CreateElement("WebPrefix");
        comNode.AppendChild(doc.CreateTextNode(Request.QueryString["WebPrefix"]));
        UpdateCheck.AppendChild(comNode);

        XmlNode drivNode = doc.CreateElement("UserName");
        drivNode.AppendChild(doc.CreateTextNode(Request.QueryString["UserName"]));
        UpdateCheck.AppendChild(drivNode);

        XmlNode StepType = doc.CreateElement("StepType");
        StepType.AppendChild(doc.CreateTextNode(txtStepType.Text));
        UpdateCheck.AppendChild(StepType);


        XmlNode StepDate = doc.CreateElement("StepDate");
        StepDate.AppendChild(doc.CreateTextNode(DateTime.Now.ToShortDateString()));
        UpdateCheck.AppendChild(StepDate);

        XmlNode StepTime = doc.CreateElement("StepTime");
        StepTime.AppendChild(doc.CreateTextNode(DateTime.Now.ToShortTimeString()));
        UpdateCheck.AppendChild(StepTime);

        XmlNode stepChecksNode = doc.CreateElement("StepChecks");
        UpdateCheck.AppendChild(stepChecksNode);




        for (int i = 0; i < 100; i++)
        {




            TextBox txtInstance = (TextBox)FindControl("txt" + i);
            string textbox = txtInstance.Text;


           

            string txtType = Request.Form["Type" + i];
            string hdnType = Request.Form["hdnType" + i];
            
            string reqCheck = Request.Form["reqCheck" + i];

            XmlNode checkNode = doc.CreateElement("Check");
            stepChecksNode.AppendChild(checkNode);

            XmlNode roomTy = doc.CreateElement("Text");

            roomTy.AppendChild(doc.CreateTextNode(txtType));
            checkNode.AppendChild(roomTy);


            XmlNode typeNode = doc.CreateElement("Type");
            typeNode.AppendChild(doc.CreateTextNode(hdnType));
            checkNode.AppendChild(typeNode);

            XmlNode priceNode = doc.CreateElement("Price");
            priceNode.AppendChild(doc.CreateTextNode(txtType));
            checkNode.AppendChild(typeNode);


            XmlNode reqCheckNode = doc.CreateElement("ReqCheck");
            reqCheckNode.AppendChild(doc.CreateTextNode(textbox.ToString()));
            checkNode.AppendChild(reqCheckNode);


           

        }

        doc.Save(Server.MapPath("../xmlReDriverListToday/" + Request.QueryString["WebPrefix"] + Request.QueryString["UserName"] + "DriverStepChecks.xml"));

What I have tried:

A lot createde the things from the beginnig because i have another site they are working on