Dynamic textbox generate ,fill value but not show sum

i have generate dynamic textbox but not find the value in dynamic text box , so my problem is ... i am not find the total sum of all text box

pls help me

------------- Button Code (Generate text box)

protected void Button1_Click(object sender, EventArgs e)

{

int rc = Convert.ToInt32(TextBox1.Text);

int cc = Convert.ToInt32(TextBox2.Text);

Table tb = new Table();

tb.ID = "table1";

for (int i = 0; i < rc; i++)

{

TableRow tr = new TableRow();

for (int j = 0; j < cc; j++)

{

TableCell tc = new TableCell();

TextBox TxtBox = new TextBox();

TxtBox.ID = "Txtbox" + i+j.ToString();

tc.ID = "cell" + i.ToString();

tc.Controls.Add(TxtBox);

tr.Cells.Add(tc);

}

tb.Rows.Add(tr);

}

Panel1.Controls.Add(tb);

}

--------------- Button Code (Sum all text box value)

protected void Button2_Click(object sender, EventArgs e)

{

int rc = Convert.ToInt32(TextBox1.Text);

int cc = Convert.ToInt32(TextBox2.Text);

Table tb = new Table();

tb.ID = "table1";

for (int i = 0; i < rc; i++)

{

TableRow tr = new TableRow();

for (int j = 0; j < cc; j++)

{

TableCell tc = new TableCell();

TextBox TxtBox = new TextBox();

TxtBox.ID = "Txtbox" + i + j.ToString();

string strTemp = "Txtbox" + i + j.ToString();

TextBox tb1 = (TextBox)FindControl("TextBox2");

TextBox txt1 = (TextBox)Panel1.FindControl("TextBox2");

}

tb.Rows.Add(tr);

}

pls help me .... in urgent