create dynamic asp.net button in code behind but render in specific place on aspx page

Creating a dynamic button in code behind as:

Dim b As Button = New Button()
b.Text = "Some Dynamic Text Here"
b.PostBackUrl = "some_page.asx"

I want to be able to render that in a specific location on an aspx page.

In aspx page, I want to do:

<td>
<%
If (specific condition) Then
    'render that specific button here <---------
Else
    'render something else
End If 
%>
</td>

1 - I know of being able to do a

Page.Form.Controls.Add(dynamic button here)

but I can not add it into a specific place on the page (not even with CSS because the button will go into a table -- the table has a column of numbers where if non zero, a button will show that crosspage postback to show drilldowned items)开发者_JAVA技巧

You can put a placeholder where you want the button to be

<asp:PlaceHolder ID="placeHolder" runat="server"></asp:PlaceHolder>

And add the button in the code

If (specific condition) Then   
    placeHolder.Controls.Add(b)