read values textbox when I create text box in aspx.cs

Question

hi guys. I have a problem with my script, I created textbox like :

 

"tdNilai = new TableCell();
txtNilaiRusak = new TextBox();
txtNilaiRusak.Attributes["id"] = arIdChild[b].ToString();
txtNilaiRusak.CssClass = "form-control create-number";
int dataKomponen = arIdKomponen.Count;"

 

but when I input values in front values always txtxNilairusak="". wht should I do. please help me soon