how to read text from image in asp.net.?

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hello friends,

i have a registration form in which i have captcha field and i want to fill the textbox with thee string shown in captcha image on button click..

any suggession will be very helpful...

Posted 1-Jun-13 7:34am

abhishekagrwl25

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debkumar@codeproject 2-Jun-13 0:20am

That needs image processing. If that was easy, there would have been automated tools which could be used for cracking captcha. Once that is done, people would use automated tools to create thousands of accounts or download same thing thousands of times using the tool which may lead to denial of service.

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Swayam231 · Answer 1 · 2013-06-01T07:48:00

well u can't directly make asp.net to read string from image thats impossible!!!
But say you have one captcha images u can store its values in string by writing:

string sdr= "2345";

and then validate that

void btn1_click()
{
if (textbox.text!= sdr)
{
//write error code
}
}

For better info visit
How to use Captcha

Its simple :)