Add controls to tables in asp

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ASP

hello myfriends.
i want to add an button and a lable to the table cells.
when i click on button text that present on lable must be changed
i write this code but do not work :

protected void Button2_Click1(object sender, EventArgs e)
    {
        for (int i = 1; i <= int.Parse(TextBox1.Text); i++)
        {
            TableRow tr = new TableRow();
            for (int j = 1; j <= int.Parse(TextBox2.Text); j++)
            {
             TableCell tc = new TableCell();
             Label  lbl= new Label();
             Button btn = new Button();
             btn.Text = (i*j).ToString();
             btn.Attributes.Add("onclick", ClientScript.GetPostBackEventReference(btn, Click"));
             if (Request["__EVENTARGUMENT"] == "Click")
                {
                    lbl.Text = (i * j).ToString();
                }        
                tc.Controls.Add(lbl);
                tc.Controls.Add(btn);
                tr.Controls.Add(tc);
            }
            Table1.Controls.Add(tr);
        }
        
    }

can you help me?
my mail : ali.daroudi@gmail.com