Rad captcha validating By code.

[Deepak]

Hi guys,
I am using rad captcha in my site and want to prevent the user if
user type the wrong captcha test . So for this i am validate the captcha by coding.
But i am facing the problem that captcha always give Return false in if(radcaptcha1.isvalid) and print error.
Here my code of Default.aspx

<asp:Label ID="lblCaptcha" runat="server" ForeColor="Red"></asp:Label>
                           <telerik:RadCaptcha ID="RadCaptcha1" runat="server" validationgroup="Submit">
                        </telerik:RadCaptcha>
 <asp:UpdatePanel runat="server" ID="UPbtnUpload" >
                        <ContentTemplate>
                             <asp:ImageButton runat="server" ID="btnUpload" CssClass="btnAdd" ImageUrl="~/Images/btnUpload.jpg"
                                OnClick="btnUpload_OnClick" ValidationGroup="Submit" />

                            </ContentTemplate>
                            <Triggers>
                            <asp:PostBackTrigger ControlID="btnUpload" />
                            </Triggers>
                        </asp:UpdatePanel>

And the code of default.aspx.cs is

protected void btnUpload_OnClick(object sender, EventArgs e)
       {
           RadCaptcha1.Validate();
          Page.Validate();


           if (RadCaptcha1.IsValid)
           {

               testimonial.ClubName = txtClub.Text;
               testimonial.Desciption = txtDiscription.Text;
               if (imageFileUpload.UploadedFiles.Count > 0)
               {
                   Guid guid = new Guid();

                   testimonial.FileName = imageFileUpload.UploadedFiles[0].FileName;
                   testimonial.FilePhysicalPath = imageFileUpload.TargetFolder;
                   testimonial.FileUrl = imageFileUpload.TargetFolder + imageFileUpload.UploadedFiles[0].FileName;
               }
               bool isCreated = KiwanisDataServices.CreateTestimonial(testimonial, ddlState.SelectedValue.ToString());
               ResetForm();
           }
           else
           {
               lblCaptcha.Enabled = true;
               lblCaptcha.Text = "The code you entered is not valid";
               return;
               //RadCaptcha1.ErrorMessage = "deepak";
           }

  Plz help me out for this problem there is any general solution of this.
I am structed with this problem plz telrik help me ya give me some example by this i can  accomplish it.

[Deepak]

Hello,
i did not understand why rad captcha not validate properly always return false by 
 Page.Validate();
            RadCaptcha1.Validate();
           if (Page.IsValid && RadCaptcha1.IsValid)
{
}
Plz help me asps.

[Pero]

Hi Deepak,

You should place the RadCaptcha in the UpdatePanel, as I think the problem is caused by an ajax request executed before the Captcha control is validated.
The RadCaptcha control updates its code on every trip to the server, regardless if it is a full postback or Ajax postback. In case of the Ajax postback the code will not be shown on the CaptchaImage if the control is not affected by the ajax call. So, the Captcha should be placed inside an UpdatePanel.

Regards,
Pero
the Telerik team