c# - OnClick not firing in UserControl when button is clicked -

i have master page. in master page have usercontrol footer. in footer have button not firing onclick. during debugging see function being called onclick, btnsignup_click, not getting hit. can't seem figure out mistake in code is.
wanted note validation functionality working correctly.

master.master

<%@ master language="c#" autoeventwireup="true" inherits="master" codebehind="master.master.cs" %> <%@ register tagprefix="xyz" tagname="footer" src="~/controls/footer.ascx" %>   <xyz:footer id="footer" runat="server" /> 

footer.ascx

<%@ control language="c#" autoeventwireup="true" inherits="footer" codebehind="footer.ascx.cs"  %>  <div>      <asp:textbox id="fname" runat="server"></asp:textbox>      <asp:requiredfieldvalidator id="requiredfieldvalidatorfname"  validationgroup="validationsignup" display="static" controltovalidate="fname" errormessage="first name required" runat="server"></asp:requiredfieldvalidator> </div>  <div class="button">     <asp:button id="btnsignup"  commandname="button" runat="server" validationgroup="validationsignup" text="signup"  headertext="please fill in required fields before continuing." onclick="btnsignup_click"/> </div>  <div class="validationsummary">                      <asp:validationsummary id="validationsummary"   validationgroup="validationsignup" runat="server"></asp:validationsummary> </div> 

footer.ascx.cs

public partial class templates_site_footer : baseusercontrol {            protected void page_load(object sender, eventargs e)     {         btnsignup.click += new eventhandler(btnsignup_click);     }     protected void btnsignup_click(object sender, eventargs e)     {                if (!page.isvalid)             return;          // code execute after button clicked     } } 

remove btnsignup.click += new eventhandler(btnsignup_click); code page_load event, had assigned onclick event button in .ascx markup , no need check validate of page again in btnsignup_click, can directly write button click event code want execute.

your footer user control code behind:

protected void page_load(object sender, eventargs e) {     //btnsignup.click += new eventhandler(btnsignup_click); }  protected void btnsignup_click(object sender, eventargs e) {     if (page.isvalid)     {          // code execute after button clicked     }     else     {          // page not validated.     } }