If you want to parse a html string at runtime with asp.net control in it you can use the method ParseControl, for example if you have a html fragment like this:
<table>
<tr>
<td>Name</td>
</tr>
<tr>
<td><asp:TextBox id="name" runat="server" /></td>
</tr>
</table>
Now if you want to parse this string at runtime into a Control object, you can do this with the ParseControl method from the TemplateControl class, the ParseControl methods can be accessed from the Page instance, like this:
string html = "<table><tr><td>Name</td></tr><tr><td><asp:TextBox id=\"name\" runat=\"server\" /></td></tr>b</table>"
Control ctrl = Page.ParseControl(html);
somePlaceHolder.Controls.Add(ctrl);
After the html has been parsed the control can be added to for example a placeholder.
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