c# - Building a URL in HTML with Text Box Values -

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i adding button website take user website , fill in various variables text boxes on site.

here markup code html page:

<body> <form id="form1" runat="server"> <div>      <asp:label id="firstnamelabel" runat="server" text="first name:" width="100px"></asp:label>     <asp:textbox id="firstnametxtbox" runat="server" width="150px"></asp:textbox>     <br />     <asp:label id="lastnamelabel" runat="server" text="last name:" width="100px"></asp:label>     <asp:textbox id="lastnametextbox" runat="server" width="150px"></asp:textbox>     <br />     <asp:label id="emaillabel" runat="server" text="e-mail address:" width="100px"></asp:label>     <asp:textbox id="emailtextbox" runat="server" width="150px"></asp:textbox>      <br />     <asp:label id="desclabel" runat="server" text="description:" width="100px"></asp:label>     <asp:textbox id="desctextbox" runat="server" height="100px" width="150px"></asp:textbox>  </div>     <button class="button" style="height:20px;width:120px" onclick="<%# string.format("location.href='https://biznetsoftware.fastsupport.com/?first_name={0}&last_name={1}&email={2}&question=   {3}",firstnametxtbox.text,lastnametextbox.text,emailtextbox.text,desctextbox.   text) %>" id="joinchatbutton">join chat</button>   </form> </body>

the page doesn't go destination url. doing wrong?

you can use code:

<%@ page language="c#" autoeventwireup="true" codefile="default.aspx.cs" inherits="_default" %>  <!doctype html>  <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server">     <title></title>     <script runat="server">     void joinchat(object sender, eventargs e)     {         string url = string.format("https://biznetsoftware.fastsupport.com/?first_name={0}&last_name={1}&email={2}&question={3}",                      firstnametxtbox.text,                     lastnametextbox.text,                     emailtextbox.text,                     desctextbox.text);           response.redirect(url);     }     </script> </head> <body> <form id="form1" runat="server"> <div>      <asp:label id="firstnamelabel" runat="server" text="first name:" width="100px"></asp:label>     <asp:textbox id="firstnametxtbox" runat="server" width="150px"></asp:textbox>     <br />     <asp:label id="lastnamelabel" runat="server" text="last name:" width="100px"></asp:label>     <asp:textbox id="lastnametextbox" runat="server" width="150px"></asp:textbox>     <br />     <asp:label id="emaillabel" runat="server" text="e-mail address:" width="100px"></asp:label>     <asp:textbox id="emailtextbox" runat="server" width="150px"></asp:textbox>      <br />     <asp:label id="desclabel" runat="server" text="description:" width="100px"></asp:label>     <asp:textbox id="desctextbox" runat="server" height="100px" width="150px"></asp:textbox>  </div>     <asp:button class="button" style="height:20px;width:120px" id="joinchatbutton" text="join chat" runat="server"onclick="joinchat" />  </form> </body> </html>

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