dynamic table creation

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();
           /* if (r1.Read())
            {
                Session["un"] = TextBox1.Text;
                Response.Redirect("sampleselect.aspx");
            }
            else
            {
                Label1.Text = "User not found";
            }*/
             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();
        }

while executing depending on the textbox1.text value the data is getting executed but each row data wil get displaying in the table.
like
username emailid option
xxx       aa@gg   Edit 
tat edit is a link button. on clicking tat edit i want to transfer the username in that table which is corresponding to that edit link button