GeekZilla
Using Regex.Replace
Say you want to get the username from a fully qualified username such as MyDomain\AUser
Most developers would turn to SubString and LastIndexOf functions .. for example
string userName = @"MyDomain\AUser"; string result = userName.SubString(userName.LastIndexOf(@"\"));
Instead of using these functions you should consider the use of Regex.Replace(). Here's how you'd do it:
string userName = @"MyDomain\AUser"; string result = Regex.Replace(userName, @".*\\(.*?)$", "$1");
You can see from the example above that the Replace method is matching on the string and just returning the first Group. (.*?) is represented in the replace expression by $1
As I'm sure you can imagine, the possibilities here are endless... example
string userName = @"MyDomain\AUser"; string result = Regex.Replace(userName, @".*\\(.*?)$", "Welcome back $1. Nice to see you again");
I hope you find uses for Regex.Replace in your applications.
Paul is the COO of kwiboo ltd and has more than 20 years IT consultancy experience. He has consulted for a number of blue chip companies and has been exposed to the folowing sectors: Utilities, Telecommunications, Insurance, Media, Investment Banking, Leisure, Legal, CRM, Pharmaceuticals, Interactive Gaming, Mobile Communications, Online Services.
Paul is the COO and co-founder of kwiboo (http://www.kwiboo.com/) and is also the creator of GeekZilla.
