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Captcha Stability
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Mostafa Fawzy
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Mostafa Fawzy asked on 31 Jul 2013, 12:08 PM
i have used in my project telerik captcha in the login page,
In some times when i type the characters from the captcha image in to text box it is telling "The code you typed is in correct" even i typed correctly.  when i restart IIS it works fine and the same patter appears again after few days.
So please can any one help me.

Markup
-----------------
   <div class="captcha">
                <telerik:RadCaptcha ID="RadCaptcha1" runat="server" CaptchaTextBoxLabel="Please type the code from the image"
                    IgnoreCase="true" CaptchaTextBoxLabelCssClass="captchaLabel" EnableRefreshImage="False"
                    CaptchaLinkButtonText="Refresh" ValidatedTextBoxID="txtCaptcha" CaptchaImage-RenderImageOnly="True">
                    <CaptchaImage BackgroundNoise="Medium" TextLength="5" LineNoise="Medium" TextChars="CustomCharSet"
                        CharSet="abcdefghijkmnpqrstuvwxyz123456789" />
                </telerik:RadCaptcha>
                <div class="captchatextBox">
                    <telerik:RadTextBox ID="txtCaptcha" runat="server" Width="180px" Height="30px" MaxLength="5">
                    </telerik:RadTextBox>
                </div>
                <div class="captchaLabel">
                    <asp:Label ID="Label1" runat="server" Text="Type code from the image" Width="230px"></asp:Label>
                </div>
            </div>


C# Code
-------------
 if (!RadCaptcha1.IsValid)
                    {
                        auditClient.AddMessage("Captcha Validation", "False");
                        lblError.Text = "Please add text on image";
                        return;
                    }
                    auditClient.AddMessage("Captcha Validation", "True");

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Slav
Telerik team
answered on 02 Aug 2013, 02:25 PM
Hi Mostafa.

I have already answered your support ticket on the matter. Please check whether the suggestions I provided there will be applicable in your scenario.

When reporting a problem in the future, I would suggest using a separate ticket/forum thread. This way the information on the case will be easier to track. That being said, let us continue our discussion in the support ticket. When there is a concrete solution for the problem you can post it here for the community.

Regards,
Slav
Telerik
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Mostafa Fawzy
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Answers by
Slav
Telerik team
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