Regular expression check file extension

Basically, what I want is to validate a file input box to check if the extension is the correct type, i. Also I would like to check multiple file types, for instance allow a gif or a jpeg or a jpg. Regards, Chris. Follow Post Reply. Kevin Spencer. I responded to this exact same question yesterday.

JPG", "test6. Multiline RegexOptions. WriteLine string. Sorry about repost but my news server sometimes gets confused and appends the question to the wrong thread. I couldn't reply because I couldn't find it. You can sometimes find it on Google but not always. Has question not clarified things. I want an expression to check for a variable number of expressions in the extension of a file path e. I hope this clarifies things. In that case, Chris, it looks like boomfield has already guessed your question, and given you a good answer!

It tried putting this in the validation expression of my regular expression validator, got it to validate a textbox with qwerty. Any ideas? Program: How to validate file extensions using regular expression in java? Matcher; import java. Is 'java2novice. Simple java regex using Pattern and Matcher classes. Java regex with case insensitive. How to validate IP address using regular expression? How to replace a pattern using regular expression in java? How to remove multiple spaces with a single space with in a string?

How to validate user name using regular expression? How to validate email address using regular expression? Is that the expected result? But the path we provided there has a filename which is not expected input. Hey Yes!! It works. Apologies, my mistake. Thanks a lot for the quick resolution and help Bryian! Keep it up!! No problem. I'm glad we got it sorted out.

Have a good day. Member This was a helpful starting point. I'll have to figure out how to do that Worked for me Member Feb Nice pattern, saved me time. I added A-Z to the pattern but changing the string to lowercase would probably suffice. I like how it handles spaces in folders and file names. Also like how it handles multiple dots in file name. Thanks G. Regular expressions can be a headache.

This couldn't be any more simple and clear. Thanks a bunch. File extensions order Sergei Vedischev Jun Sergei Vedischev. Hello, Bryian! It would be better to list similar file extensions in order from longest to shortest because of regexp "laziness". For example, xlsx xls will match abc. As well with docx doc. Thank you! Re: File extensions order Bryian Tan Jul Thanks for the suggestion. I learned something new from you today.