Editing a textbox for numeric

(*[0-9A-Za-z]+\.[[0-9A-Za-z][0-9A-Za-z]*){3, 15}
use in a custom validator

(*[0-9A-Za-z]+\.[0-9A-Za-z][0-9A-Za-z]*){3, 15}
use in a custom validator

oops...Regular expression that states any amount of letters that have at least one digit or letter (alphanumeric in front, followed by a period, followed by at least one alphanumeric and therefore you must have at least  3 characters and up to 15.

(*[0-9A-Za-z]+[.]{0,1}[0-9A-Za-z][0-9A-Za-z]*){3, 15}
use in a custom validator


Just read your statement clearer...this is same as above except there can be 1 or less periods

my regular expression is wrong...i'm trying to figure this one out.

It does not have to be just 1 edit.  Must catch anything non numeric and allow only "."

yep and that's what regular expressions are good for, pattern matching...basically the patterns are

1
11
111
1a1  up to fifteen characters
but when the decimal comes into play, that when the problem occurs because that must at least one alphanumeric in front of the decimal and i would think one after....i.e. pattern if there's a decimal:
x.x   can't be .x   or x.     where x = a-z, 0-9, etc.  

problem is i can make a regular expression for this but it will be pretty long... because you have to consider when there's not a set number of decimals in front of the decimal nor in back.  so you have a lot of cases to consider...  what programming language are you using by the way?
.....

Well how about a try catch to see if the textbox is decimal:

Try
convert.todecimal(txtmBox1.text)
catch...

that would actually work and you could set the text box length to 15.

well, i'm sorry...is decimal wouldn't work because your input will be alphanumeric...

i'm actually doing a programs to work with the regular expression.  Another option you have to separate the string, but that's more code than needed...but as a last result that will be the way to go.

here's the regular expression: ^[0-9A-Za-z]{1,15}([.]{0,1}[0-9A-Za-z]{1,13})*$

oh...and remove the * that's before the $

^[0-9A-Za-z]{1,15}([.]{0,1}[0-9A-Za-z]{1,13})$


remove the * before the $ in the example code too when testing it.