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    Validating file extension with regularexpressionvalidator

    ( #Start of the group #1 [^\s] # must contains one or more anything (except white space) ( # start of the group #2 \. i) # ignore the case sensive checking for the following characters ( # start of the group #3 jpg # contains characters "jpg" | # .png # contains characters "png" | # .gif # contains characters "gif" | # .bmp # contains characters "bmp" ) # end of the group #3 ) # end of the group #2 $ # end of the string ) #end of the group #1 Whole combination is means, must have 1 or more strings (but not white space), follow by dot “.” and string end in “jpg” or “png” or “gif” or “bmp” , and the file extensive is case-insensitive. , false Image is valid : a.mp3 , false Image is valid : jpg , false Image is valid : gif , false Image is valid : png , false Image is valid : bmp , false PASSED: Valid Image Test([ String;@116471f) =============================================== com.mkyong.regex.

    This regular expression pattern is widely use in for different file extensive checking.

    Does anyone know a regular expression that will validate the file extension but also allow multiple file extensions if necessary. Basically, what I want is to validate a file input box to check if the extension is the correct type, i.e. Also I would like to check multiple file types, for instance allow a gif or a jpeg or a jpg. Does anyone know a regular expression that will validate the file extension but also allow multiple file extensions if necessary. Basically, what I want is to validate a file input box to check if the extension is the correct type, i.e. Also I would like to check multiple file types, for instance allow a gif or a jpeg or a jpg. Here there are some clues string check File Regex = @"^. BTW, there is an excellent freeware utility for building and testing Regular Expressions, which you can download from: -- HTH, Kevin Spencer .. "Kevin Spencer" It tried putting this in the validation expression of my regular expression validator, got it to validate a textbox with as the text value and it didn't work. \.((jpg)|(gif)|(jpeg))$"; string[] test Data = new string[] ; foreach(string test in test Data) Hope this helps -- ____________________ Chris Kennedy wrote: Does anyone know a regular expression that will validate the file extension but also allow multiple file extensions if necessary. Basically, what I want is to validate a file input box to check if the extension is the correct type, i.e. Also I would like to check multiple file types, for instance allow a gif or a jpeg or a jpg. It tried putting this in the validation expression of my regular expression validator, got it to validate a textbox with as the text value and it didn't work. \.((jpg)|(gif)|(jpeg))$"; string[] test Data = new string[] ; foreach(string test in test Data) Hope this helps -- ____________________ Chris Kennedy wrote: Does anyone know a regular expression that will validate the file extension but also allow multiple file extensions if necessary. Basically, what I want is to validate a file input I tried the expression ^. [g G])|([g G][i I][f F]))$ to allow extensions like j Pe G etc Chris Kennedy wrote: Here there are some cluesstring check File Regex = @"^.

    \.((jpg)|(gif)|(jpeg))$"; string[] test Data = new string[] ; foreach(string test in test Data) Hope this helps -- ____________________ Chris Kennedy wrote: Does anyone know a regular expression that will validate the file extension but also allow multiple file extensions if necessary. Basically, what I want is to validate a file input box to check if the extension is the correct type, i.e. Also I would like to check multiple file types, for instance allow a gif or a jpeg or a jpg. Sorry about repost but my news server sometimes gets confused and appends the question to the wrong thread. You can sometimes find it on Google but not always. I want an expression to check for a variable number of expressions in the extension of a file path e.g. Net Developer Microsoft MVP Big things are made up of lots of little things. \.((jpg)|(gif)|(jpeg))$ and it worked for me in a Regular Expression Validator. I didn't find a way to specify that the regular expression is case insensitive for the Regular Expression Validator.

    Bm P , true Image is valid : , true Image is valid : , true Image is valid : , true Image is valid : , true Image is valid : , false Image is valid : , false Image is valid : , false Image is valid : , false Image is valid : , false Image is valid : , false Image is valid : , false Image is valid : , false Image is valid : , false Image is valid : , false Image is valid : a.

    Hi, using version 4.5 I am trying to validate file upload image validation and seems this expression is not working.

    NET webform that has a file upload control that is tied to a regular expression validator.

    The Regular Expression Validator does not have an option to ignore case and the ASP.It will automatically validate the extension of the uploaded file before the page is posted back.Here I will show you regular expressions for various file formats to validate a file upload. "Kevin Spencer" In that case, Chris, it looks like boomfield has already guessed your question, and given you a good answer! "bloomfield" Here there are some clues string check File Regex = @"^. "bloomfield" Here there are some clues string check File Regex = @"^."Chris Kennedy" Sorry about repost but my news server sometimes gets confused and appends the question to the wrong thread. You can sometimes find it on Google but not always. I want an expression to check for a variable number of expressions in the extension of a file path e.g.

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