dynamic table and controls

protected void TextBox1_TextChanged(object sender, EventArgs e)
{
    con.Open();
    PlaceHolder1.Controls.Clear();

    if (RadioButton1.Checked == true)
    {
        SqlDataReader r1 = default(SqlDataReader);
        SqlCommand cmd = new SqlCommand("Select * from userdet
                         where username  like N'%" + TextBox1.Text + "%'", con);
        cmd.Parameters.AddWithValue("@username", TextBox1.Text);
        r1 = cmd.ExecuteReader();
        int count = 1;
         Table tbl = new Table();
         PlaceHolder1.Controls.Add(tbl);

       do
        {


           while (r1.Read())
            {

                for(int i=0;i<count;i++)
                {
                    TableRow tr = new TableRow();
                     tr.BorderWidth.Equals(10);
                 //  for(int j=0;j<3;j++)
                //   {
                        TableCell tc = new TableCell();
                        TableCell tc1 = new TableCell();
                        TableCell tc2 = new TableCell();


                       TextBox txtBox = new TextBox();
                        TextBox txtBox1 = new TextBox();
                      //  TextBox txtBox2 = new TextBox();
                        LinkButton lnkbutton = new LinkButton();//Response.Write(r1.GetString(0) + "<br>");

                        txtBox.Text = r1[0].ToString();
                        txtBox1.Text = r1[13].ToString();
                        //txtBox2.Text = r1[1].ToString();
                        lnkbutton.Text = "edit";

                            Session["un"] = txtBox.Text;
                            // Session["un1"] = txtBox1.Text;
                            lnkbutton.PostBackUrl = "../sample/editp.aspx";

                     tc.Controls.Add(txtBox);
                     tc.Controls.Add(txtBox1);
                     tc.Controls.Add(lnkbutton);
            // Add the TableCell to the TableRow
                     tr.Cells.Add(tc);
                     tr.Cells.Add(tc);
                     tr.Cells.Add(tc);

    //    }
        // Add the TableRow to the Table
          tbl.Rows.Add(tr);
          }
         // count++;

            }
        } while (r1.NextResult());


        r1.Close();
        con.Close();
        cmd = null;
        r1 = null;
        con = null;
        //r1.Close();
    }