How we can access dynamic created control in dynamically created Table

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C#

ASP.NET

I m create a asp table

//.aspx page code

<asp:Table ID="_tb" runat="server" style="border: 1px solid;" Width="80%"
                   GridLines="Both">
                   <asp:TableRow runat="server" BackColor="#3f3f3f">
                       <asp:TableCell Width="5%" style="color:white"><center>Sr No</center></asp:TableCell>
                       <asp:TableCell Width="30%" style="color:white"><center>Mid Station-Name</center></asp:TableCell>
                       <asp:TableCell Width="10%" style="color:white"><center>Status</center></asp:TableCell>
                   </asp:TableRow>
               </asp:Table>

then i m creating dynamically rows and put some control in cells

//.cs page code

for (int i = 0; i < AllStat.Count; i++)
{

TableRow tr = new TableRow();
tr.Style.Add("border", "1px");
TableCell td1 = new TableCell();
td1.Attributes.Add("class", "cent");
TableCell td2 = new TableCell();
td2.Attributes.Add("class", "cent");
TableCell td3 = new TableCell();
td3.Attributes.Add("class", "cent");

td1.Text = (i + 1).ToString();
tr.Cells.Add(td1);

Label lb = new Label();
string[] splt = AllStat[i].Split(',');
lb.ID = splt[0];
lb.Text = splt[1].ToString();
td2.Controls.Add(lb);
tr.Cells.Add(td2);

DropDownList ddl = new DropDownList();
ddl.Items.Add(new ListItem("Select","0"));
for (int j = 0; j < AllStat.Count; j++)
{
ddl.Items.Add(new ListItem((j+1).ToString(),(j+10).ToString()));
}
td3.Controls.Add(ddl);
tr.Cells.Add(td3);
_tb.Rows.Add(tr);
}

but th problem is that i cant access any control that i created at run time..

when we count yhe rows in this table it return only "1" row every time that creating on .aspx page here i want to access dynamicall created dropdown list and label text..


thanks.