Comments on: Captcha using ASP.Net and C# http://www.dotnetthoughts.net/2009/09/15/captcha-using-asp-net-and-c/ a dotnet developer's technical blog Thu, 09 Feb 2012 09:26:30 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Anuraj P http://www.dotnetthoughts.net/2009/09/15/captcha-using-asp-net-and-c/#comment-457 Anuraj P Tue, 04 Jan 2011 08:30:47 +0000 http://anuraj.wordpress.com/?p=380#comment-457 <a href="#comment-456" rel="nofollow">@venkat </a> Its nothing; seems pretty self explanatory, I am randomly deciding the start index and length of the word to take it from GUID. If it contains a "-", I am replacing it with 0. Hope you understood. @venkat Its nothing; seems pretty self explanatory, I am randomly deciding the start index and length of the word to take it from GUID. If it contains a “-”, I am replacing it with 0. Hope you understood.

]]> By: venkat http://www.dotnetthoughts.net/2009/09/15/captcha-using-asp-net-and-c/#comment-456 venkat Mon, 03 Jan 2011 07:15:35 +0000 http://anuraj.wordpress.com/?p=380#comment-456 Hi Wish you a very happy new year. Could you pls explain this part.. // Create string to draw. Random r = new Random(); int startIndex = r.Next(1, 5); int length = r.Next(5, 10); String drawString = Guid.NewGuid().ToString().Replace("-", "0").Substring(startIndex, length); I debugged this code but i didnt get it, i debugged and note downs the guid passed one and use substring to get specific character but it show different .. Pls explain this... Hi Wish you a very happy new year.

Could you pls explain this part..

// Create string to draw.
Random r = new Random();
int startIndex = r.Next(1, 5);
int length = r.Next(5, 10);
String drawString = Guid.NewGuid().ToString().Replace(“-”, “0″).Substring(startIndex, length);

I debugged this code but i didnt get it, i debugged and note downs the guid passed one and use substring to get specific character but it show different ..

Pls explain this…

]]> By: Anuraj P http://www.dotnetthoughts.net/2009/09/15/captcha-using-asp-net-and-c/#comment-379 Anuraj P Wed, 28 Jul 2010 08:50:52 +0000 http://anuraj.wordpress.com/?p=380#comment-379 Hi Radhika I am not clear with your requirement. You want how to implement the code? or You want to use ASPX instead of ASHX First option is simple and clearly mentioned in the post, like Create ASHX Page, copy / paste the code provided. Add an Image control in the ASPX Page, and set the Image source as ASHX that's it. It will display the Image and you can check the value against the session variable. Yes you can use ASPX instead of ASHX, simply Copy / Paste the code to Page Load event of the Page, replace context with HttpContext.Current class. Rest is same as ASHX. Hi Radhika
I am not clear with your requirement. You want how to implement the code? or You want to use ASPX instead of ASHX First option is simple and clearly mentioned in the post, like Create ASHX Page, copy / paste the code provided. Add an Image control in the ASPX Page, and set the Image source as ASHX that’s it. It will display the Image and you can check the value against the session variable. Yes you can use ASPX instead of ASHX, simply Copy / Paste the code to Page Load event of the Page, replace context with HttpContext.Current class. Rest is same as ASHX.

]]> By: Radhika http://www.dotnetthoughts.net/2009/09/15/captcha-using-asp-net-and-c/#comment-378 Radhika Wed, 28 Jul 2010 06:57:08 +0000 http://anuraj.wordpress.com/?p=380#comment-378 Hello, how can integrate this captcha code in aspx page. can you please tell me . thank you, Hello,
how can integrate this captcha code in aspx page. can you please tell me .
thank you,

]]> By: Anuraj P http://www.dotnetthoughts.net/2009/09/15/captcha-using-asp-net-and-c/#comment-367 Anuraj P Fri, 23 Jul 2010 08:10:16 +0000 http://anuraj.wordpress.com/?p=380#comment-367 We are using Session to manage it, before creating the image, we are setting the value to the session, and based on the session we are rendering image. We are using Session to manage it, before creating the image, we are setting the value to the session, and based on the session we are rendering image.

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