I know this is a really old thread but if anyone is looking...

I do exactly what is suggested above but I'm adding checkboxes.

However, these don't showup on the page...

<div id="dv1" runat="server"></div>

and then on the code behind:

CheckBox chk = new CheckBox();                   
chk.ID = "chk" + MyList.ItemID.ToString();                   
chk.Text = MyList.NameEn;                   
chk.ToolTip = "some special tip for: " + MyList.NameEn;
chk.Visible = true;
dv1.Controls.Add(chk);