RegEx to get only page name from URL

Question

Hi Can anyone help me to understand how to take: http://www.mywebsite.com/news/local_news/Bullet-riddled_body_found_on_North_Side.html And strip off everything before the last / to result in: Bullet-riddled_body_found_on_North_Side.html The replace on the .html is something I know how to do and I think i need to use: Regex RE = new Regex(/RegexOptions.RightToLeft); Match theMatch = RE.Match(URL); But his only returns the character /. How do you say delete everything before the first instance of the / character looking left to Right? Thanks in advance.

Alan · Answer

You don't need a placeholder because only one result is possible. Just do: Regex RE = new Regex(@[^/]*(?=\.html.*$)); Match match = RE.Match(URL); string myFileName = match.Value;

Tony Serva · Answer

Sweet! It worked beautifully. I had to add a test for records that did not have .html and then it was perfect. Thank you!

Tony Serva · Answer

Sorry to be lame but where would I put the pace holder

Tony Serva · Answer

I'll give it a try

Alan · Answer

If you do need to use regex then the following seems to be working OK with the new url: Regex RE = new Regex(@[^/]*(?=\.html.*$));

Alan · Answer

Do you have to use regular expressions for this Tony as it's much easier to use traditional string parsing: string url =  http://www.mysite.com/news/local_news/One_dies_one_wounded_in_vehicle_shooting.html?c=y&viewAl ; int index1 = url.LastIndexOf(/); int index2 = url.LastIndexOf(.); string pageName = url.Substring(index1 + 1 index2 - index1 - 1);

Tony Serva · Answer

Thanks for the reply but it did not actually work. This is an example of the string: http://www.mysite.com/news/local_news/One_dies_one_wounded_in_vehicle_shooting.html?c=y&viewAl Regex regex = new Regex ( @^.*/(? [^/]+.?)(\?.*)? ); //Regex regex = new Regex(@^.*/(? [^/]+.?)(?=\.html$)?); Match match = regex.Match(URL); string myFileName = match.Groups[ myFileName ].Value; Result: myFileName still = One_dies_one_wounded_in_vehicle_shooting.html?c=y&viewAl I need it to look tike this: One_dies_one_wounded_in_vehicle_shooting Any ideas? I am reading through the O'Reilly Reg Ex book now

Alan · Answer

Try: Regex RE = new Regex(@[^/]*$); or to remove the .html as well: Regex RE = new Regex(@[^/]*(?=\.html$));

Tony Serva · Answer

Ok I found two ways. Thanks to Phil Haack at http://forums.asp.net/t/551079.aspx First is this: string myUrl = URL; Uri myUri = new Uri(myUrl); string fileName = System.IO.Path.GetFileName(myUri.AbsolutePath); And the second is this (which I am using) Regex regex = new Regex(@^.*/(? [^/]+.?)(\?.*)?); Match match = regex.Match(URL); string myFileName = match.Groups[myFileName].Value; But 1- Not all of the items in URL have filenames. 2- I need to remove the .html So an if statement to test for the existence of the .html and then striping it out if it does should do it.