c# - How do I add this (recaptcha) form dynamically? -

i have .aspx file , want dynamically add form , controls below in <script> tag. (page-language=c#)

<form runat="server">         <asp:label visible=true id="lblresult" runat="server" />          <recaptcha:recaptchacontrol             id="recaptcha"             runat="server"             theme="red"             publickey="6ld4pcqsaaaaadvexkhlgujfxixyyej0x6zqdzan"             privatekey="6ld4pcqsaaaaabag0i2nk6fmjbstxqqcs2xrdoea"         />         <br />         <asp:button id="btnsubmit" runat="server" text="submit" onclick="btnsubmit_click" /> </form> 

why want add dynamically? although, not answer question more simpler way put said markup in placeholder control , sets placeholder's visibility per requirements.

and if must add controls dynamically, still need placeholder (after script tag) parent , can create need control hierarchy code-behind. example,

var form = new htmlform();  var label = new label(); label.id = "lblresult"; form.controls.add(label);  var captcha = new recaptchacontrol(); captcha.id = "recaptcha"; ...  placeholder.controls.add(form);