C# - Accessing Web User Controls From Code

I created a user control in Asp.Net which I populate with <asp:Table id = "...." /> this table has columns that contain dropdownlists, textfields and other web controls. In the code behind I am not able to access these web controls, is there a way I can access them. or I shouldn't be doing that in the code behind of the user control? here is my ascx code markup:

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="MarriageControl.ascx.cs" %>
<%@ Register assembly="BasicFrame.WebControls.BasicDatePicker" namespace="BasicFrame.WebControls" tagprefix="BDP" %>
<asp:TextBox ID = test runat = "server" />
<asp:Table ID = "marriageInfoTable" runat = "server" Caption="معلومات الزواج"
CellPadding="2" CellSpacing="2" Width="979px" Height="164px">
<asp:TableRow runat="server">
<asp:TableHeaderCell runat = "server" Text = " " />
<asp:TableHeaderCell runat = "server" ID = "husbandHeader" Text = "الزوج" HorizontalAlign = "Right" />
<asp:TableHeaderCell runat = "server" ID = "wifeHeader" Text = "الزوجة" HorizontalAlign = "Right" />
</asp:TableRow>
<asp:TableRow runat="server">
<asp:TableCell runat = "server" Text ="الاسم الرباعي" />
<asp:TableCell runat = "server">
<asp:TextBox runat ="server" ID = "fullNameHusbandTextBox" Height = "30px" Width = "250px" Font-Bold = "true" Font-Size = "20px"/>
</asp:TableCell>
<asp:TableCell runat = "server">
<asp:TextBox runat ="server" ID = "fullNameWifeTextBox" Height = "30px" Width = "250px" Font-Bold = "true" Font-Size = "20px"/>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow runat="server">
<asp:TableCell ID="dateOfBirthCell" runat = "server" Text ="تاريخ الميلاد" />......