Hmmm.  This all makes sense, but I get an:

Error: 'null' is null or not an object

when I try to submit with an invalid entry in the reCaptcha...

Thank you, very useful.

alessandro, thank you so much for sharing your solution. It wasn't working at first, but after adding ChildrenAsTriggers="false" it worked perfectly!

Alessandro, what can I do if my Recaptcha is inside a MultiView which is encapsulated by a UpdatePanel?  I applied your solution with no results. Thanks.

Hi,

Example works ok however it never returns a valid response. if the update panels are removed it works. any ideas?

regards

toby.

Calling the Validate method fixes the failure ti validate:

public void btnSubmit_Click(object sender, EventArgs args)

{

   recaptcha1.Validate();

   if (!recaptcha1.IsValid)

   {

       labelError.Text = "Incorrect, try again!";

labelError.ForeColor = System.Drawing.Color.Red;

//Reload recaptcha

ScriptManager.RegisterClientScriptBlock(

this.Page,

this.Page.GetType(),

"whatever1",

"Recaptcha.reload();",

true);

       UpdatePanel2.Update();

   }

}

Hi all. I was asked to add captcha to some web forms for contact and subscription information, so I though

Hello ,

I read above comments. Also I m getting same problem .

do need to add

" ScriptManager.RegisterClientScriptBlock(

this.Page,

this.Page.GetType(),

"whatever1",

"Recaptcha.reload();",

true);"

only you can update your update your update panel.

problem will solved.

Thanks

I have copied this, however it always returns false, even if i type in the words correctly.?!

any help?

thanks

I second Henrys problem. IT always returns false. Any solutions?

Actually, I take it back. It doesn't return false, rather, nothing at all happens. I added the following to the code-behind:

if (recaptcha1.IsValid)

       {

           labelError.Text = "Great!";

           labelError.ForeColor = System.Drawing.Color.Green;

       }

but as mentioned, the code doesn't execute??

Pingback from  Automatically reload reCAPTCHA when postingback via a partial refresh (UpdatePanel)  « Yasserzaid’s Weblog

I download your .dll file but its refference is not added  into asp page . please tell me how we can add refference in asp.net.

thanks for helf

Thank you!  Just what I was looking for!

Great code dude its really working

Amazing job!!thanks for the article....

Encountering the same problem as Henry and Phil.

Page.IsValid is always false.

What is the solution?

do recaptcha works on localhost?

if yes, please tell me what is the process???

I tried all above said, but I am getting always false in recaptcha.validate() method.

please help me...

What happens if the public and private keys are invalid?

Thanks pal, the code worked and I have got the desired output with the code.

Best Regards,

Sougandh Pavithran

INDIA

Hi Sougandh,

Still Page.IsValid/recaptcha1.Isvalid always returns false.

How did you get a desired output? Please let me know.

Thanks,

Kameswari.

wa

Thanks for your help! I needed to solve it!

I'm having a problem with this, it works for me but only on the first time I land on the page (like by typing the url in the browser). The reCaptcha is in my Master Page hidden in a JQueryUI dialog (modal). When I first land on the page everything works great, I can show the modal, use the form, and everything works. If i navigate to any other page using that master page, the page finishes loading, then automatically gets redirected to the reCaptcha on a blank white page...

Any thoughts?

I tried this, however i keep getting a error still in recaptcha.js at e("recaptcha_challenge_field_holder") is null.Can u pls help...

Solution: ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), "whatever1", "Recaptcha.reload();", true);

Thank you very much! Your solution worked nice!

Hi all,

Recaptcha disappears after postback while using updatepanel. Doing the Recaptcha.Reload() does not solve the issue?

Any help will be very appreciated.

Thanks