get tex box value inside gridview

Question

I have placed GridView1 inside a panel in .aspx file.

here is my code behind...

foreach (GridViewRow gvrC in GridView1.Rows)

        {

            if (gvrC.Visible)

            {

                for (int x = 2; x < GridView1.Columns.Count; x++)

                {

                    foreach (Control cc in gvrC.Cells[x].Controls)

                    {

                        string str = ((TextBox)cc).Text;

                        //my code here. I want to display textbox value

                    }

                }

            }

        }

but it is not entering the 2nd foreach() loop.

plz give me the solution.

Thank You.