Get dynamically genrated control id within table row

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C#

ASP.NET

user-controls

I have web application in this am using user control to place it in the table according to row depend on count.Each row has one usercontrol and each usercontrol has 4 textboxes .I am not able to get any of text boxes in the usercontrol when i submit the page.however i am getting the row in which usercontrol placed how can i get the controls id,please have look in my code suggest if i have done any wrong.

MasterPage ctl00 = FindControl("ctl00") as MasterPage;
ContentPlaceHolder cplacehld = ctl00.FindControl("ContentPlaceHolder1") as ContentPlaceHolder;
foreach (SeatBookDetails sff in SBD)
{
    TableRow trow = (TableRow)cplacehld.FindControl("Row_" + sff.SeatRowId.ToString() + "_" + sff.SeatRowno.ToString());
    if (trow != null)
    {
        TextBox txtcust = (TextBox)trow.FindControl("txtcustname");

        if (txtcust != null)
        {

      }
        TextBox txtprofession = (TextBox)trow.FindControl("txtprofession");
        if (txtprofession != null)
        {

        }
    }
}

This is the one of textbox id in usercontrol when page rendered ctl00_ContentPlaceHolder1_ctl00_txtcustname

and this is one of row id in which these textboxes reside ctl00_ContentPlaceHolder1_Row_1_10

please suggest any other way if it not going to work?