لینک کوتاه : https://en.magicfile.ir/?p=2409
نمونه سورس و کد CAPTCHA در ASPX vb.net
Today, in this post, we have prepared for you, dear users of the website, a magic file of a sample source and CAPTCHA code in ASPX vb.net ready for download. with which you can create CAPTCHA graphics that you can use on websites to help authenticate users.
CAPTCHA چیست؟
CAPTCHA stands for C Completely A utomated P ublic T uring t est to tell part to C computers and Humans. This method uses images of words or numbers that, in theory, are distorted and jumbled enough that an optical character recognition program can't read them, but a human should be able to do so easily.
ویژگی های اصلی :
- Six characters (using numbers 0-9, uppercase AZ and lowercase az).
- به حروف کوچک و بزرگ حساس است
- دارای رنگ و موقعیت فونت پویا.
- کمک می کند (به وضوح در جعبه پیام قابل مشاهده است).
بیایید به برخی از جزئیات این روال نگاه کنیم.
The HatchBrush object is used to draw the background of the grid. The randomly generated numeric characters are drawn one graphic character at a time and randomly placed along the vertical axis and slightly off the horizontal axis. The FillEllipse method of the Graphics object is used to create noise at 50 different random points in the graphic.
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