C generates a verification code that takes a random number plus the letter of
- 2020-05-30 19:49:24
- OfStack
Before 1 directly used to generate captcha method, take 4 digits no problem, the results plus letters, take 6 digits, the efficiency is very low.
Improved by 1. The method is as follows
Improved by 1. The method is as follows
var text2 = "";
var random = new Random((int)DateTime.Now.Ticks);
const string textArray = "23456789ABCDEFGHGKLMNPQRSTUVWXYZ";
for (var i = 0; i < iVcodeNum; i++)
{
text2 = text2 + textArray.Substring(random.Next() % textArray.Length, 1);
}
return text2;