Hi,

 I have a Regex to validate password by following conditions:

 1. password must be between 8 and 10 characters
2. contain at least one one letter and one digit
3. not contain leading and trailing blanks

But if the first character is numerical, my regex failed, other cases are ok. Can anyone help me out. Thanks a lot!

 Here is the Regex i used:

 ^[^\s].*(?=.{7,10})(?=.*[a-zA-Z])(?=.*\d).*[^\s]$

^(?i)(?=.*\d)(?=.*[a-z])\S{8,10}$

validates

123456789A

for example

i probly misunderstood your spec: u r allowing white spaces in the pass (with exception of leading and trailing ones), right?

u can try

^(?!\x22)(?i)(?=.*\d)(?=.*[a-z]).{8,10}(?<!\x22)$

it'll not allow leading and trailing white spaces; it'll validate

1234 6789A

for example

Thanks Sergei,

 but your regex not works. I should say not working in ASP.Net, Actually, i have other Regex, they are all working for my requirement, but not in ASP.NET. For example,

^(?=.*[0-9])(?=.*[a-zA-Z])(?!.*\s).{7,10}$

I don't know what is special in ASP.Net. Any suggestions?

Thanks

sprry, i don't use ASP; works OK in C#, which i thought u were using.

i got solution, thanks.

 here is the one:

(?=^[^\s].{7,10}$)(?=.*\d)(?=.*[a-zA-Z]).*[^\s]$

(?=^[^\s].{7,10}$)(?=.*\d)(?=.*[a-zA-Z]).*[^\s]$

your regex

(?=^[^\s].{7,10}$)(?=.*\d)(?=.*[a-zA-Z]).*[^\s]$

validates this str which is 11-char long:

1234567890a

u can use \S instead of [^\s]