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);