ASP.NET - No Captcha ReCaptcha 2.0 with ASP.NET (C# Version) : Code Entry

Live Editing Disabled for Server-Side Example

HTML

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Load.aspx.cs" Inherits="Load" %>

<!DOCTYPE html>

<html xmlns="http:'www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
<script src='https:'www.google.com/recaptcha/api.js'></script>
</head>
<body>
<form id="form1" runat="server">
<label>Name</label>
<asp:TextBox ID="name" runat="server"></asp:TextBox>
<%
'You will need to the new reCaptcha 2.0 Site Key for this.
'Go here: https:'www.google.com/recaptcha/admin
'And add a new Site Key for your website.
'For local testing, you will have to test with
'local/site.asp
'127.0.1/site.asp
'It will not work with a static IP Address as I would prefer.
%>

        
        <div class="g-recaptcha" data-sitekey="6LeGzQATAAAAAGglcdHMRAuR8IOAdAFD47HpCZRQ"></div>
        <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
        <asp:Label ID="Label1" runat="server"></asp:Label>
</form>
</body>
</html>

ASP.NET

protected void Button1_Click(object sender, EventArgs e)
    {
        String strname = name.Text;
        String captcha = Request.Form["g-recaptcha-response"];
        //Next we are going to make sure that each form variable has a value (Meaning: Filled out)
        if (strname == null || strname == "")
        {
            Label1.Text = "Please provide your name";
            //next, we are going to challange the reCaptcha, to make sure that it is not blank, 
            //and there is NO way around this. If it is not blank, then we send them a message.
        } 
        else if (captcha == null || captcha == "")
                {
            Label1.Text = "You have not completed the <strong>reCAPTCHA</strong><br />Please click on the blank box.<br />Thanks You";
        }
        else
        { // If the user has completed the reCaptcha, then we send a message letting them know.;
            Label1.Text = "Thank you for trying out the <br /><strong>ASP.NET (C# Version) / Jquery reCAPTCHA 2.0</strong> demo.";
        }
    }

Resources

(Copy JS and CSS code below, and add it to your project. It is best to download and host from within your site. This will reduce bandwidth drain from your hosting server and the servers hosting the actual files.)

https://www.google.com/recaptcha/api.js

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