Allow specific characters - Regular Expression

Hello everyone
I am new to regular expression and I have a very simple question. I use the "read from text file" function to load a Tab delimited file with 3 columns into my VI. Next, the string is converted in array and I use the values.
Nevertheless, I want to develop a "filter" allowing only digits (0-9), colon, comma and point into strings.
Using the "match regular expression" function, I was trying a regular expression like that:
[^0-9]|[^\].[|^:]|[^,]
But it is not working.
Could someone help me with this issue?
Thanks
Dan07
Solved!
Go to Solution.

Hello
Actually I don't need to modify the string that has "invalid" characters, I just need to identify them instead. Find below a VI testing both methods: Match Regular Expression and Search and Replace String.
Using Match Regular Expression method, I got correct results since all the "valid" values must be identified as "-1" and all the "invalid" values must be identified as positive numbers (offset).
Nevertheless, using Search and Replace String method I got wrong results, since all the strings were classified as "valid" (-1), but "bg" and "03/12/2010" are not "valid".
I will go ahead with Match Regular Expression method because it is working great, but I was just wondering how to fix Search and Replace String method to achieve equivalent results.
Thanks
Dan07
Attachments:
Regular Expression_example.vi ‏18 KB

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