Regular expression validation

Question

Hello Guys,
I am developing windows application using C#.
Can we use regular expression validation in windows application? How?
I want a string which contain starting 5 char Alphabets then 4 char numeric and 1 char Alphabet in sequence.
Regards,
Zuber Kazi

Jignesh Trivedi · Answer

hi, yes, u can use regular expression validation in windows application. Try... string stringInput = "testw1234s"; Regex myPattern = new Regex(@"[A-Za-z]{5}\d{4}[A-Za-z]{1}"); bool a = myPattern.IsMatch(stringInput); also refer http://www.codeproject.com/Articles/10093/Validators-for-Windows-Forms-ValidationProvider-Co hope this help.

Vulpes · Answer

Note that if those characters are the only ones the string can contain, then you also need to add the ^ (string start) and $ (string end) anchors to your regular expression: Regex myPattern = new Regex(@"^[A-Za-z]{5}\d{4}[A-Za-z]$"); If you don't do that then a string like the following will also be matched as well: string stringInput = "anothertestw1234salsomatches";

Zuber Kazi · Answer

I found the way using System.Text.RegularExpressions; Match m = Regex.Match(str, "[a-zA-Z][a-zA-Z][a-zA-Z][a-zA-Z][a-zA-Z][0-9][0-9][0-9][0-9][a-zA-Z]"); if (m.Success) MessageBox.Show("valid"); else MessageBox.Show("invalid");

Regular expression validation

Answers (3)