Question

I am adding controls dynamically to my page on the basis on a condition.There’s a button in these controls, to which i have attached an event handler as well for click event.Now in this event handler, i am trying to access my dynamically generated controls, but getting an exception. Here’s my code:

protected void Page_Load(object sender, EventArgs e)
        {
            String Method = Request.QueryString["Method"];
            String Tag = Request.QueryString["Tag"];


            if (Method=="ADD" && Tag=="METHOD")
            {

                //6
            TableCell cell11 = new TableCell();
            cell11.Text = "NEXTLEVEL";

            TableCell cell12 = new TableCell();
            TextBox txt6 = new TextBox();
            txt6.ID = "txt6";
            cell12.Controls.Add(txt6);

            TableRow row6 = new TableRow();
            row6.Cells.Add(cell11);
            row6.Cells.Add(cell12);

            container.Rows.Add(row6);
                TableCell cell14 = new TableCell();
                Button submit = new Button();
                submit.ID = "SubmitButton";
                submit.Text = "Submit";
                submit.Click += new EventHandler(submit_Click);

                cell14.Controls.Add(submit);

                TableRow row7 = new TableRow();

                row7.Cells.Add(cell14);

                container.Rows.Add(row7);
            }

void submit_Click(object sender, EventArgs e)
        {
            ModifySessionAnalyzer msa = new ModifySessionAnalyzer();
            TextBox txt6= (TextBox)Page.FindControl("txt6") as TextBox;
            ##String message = txt6.Text;##

        }

Answer 1

TableCell cell12 = new TableCell();
TextBox txt6 = new TextBox();
txt6.ID = "txt6";
cell12.Controls.Add(new TextBox());

This is wrong, you are not adding the txt6 control to the cell, instead you are adding a new textBox…