Hi,

Can someone give me the validation expression for a RegularExpressionValidator in asp.net. i need two  validation expression.The rule for the first one is as follows.It should allow the following:

a-z or A-Z
0-9 and
underscore (_)
Also, the underscore should not be the first or the last character.

Rule for second validation expression is:

only numbers 0-9 and it should be four digits

Thanks & Regards,
Frenz

Hi,

I got the answer for the second one its \d{4}. Can someone help me with the first one.

Thanks,

Frenz