Question:
String validation ..
I want to validate a string contains only the following characters :
- A-Z
- 0-9
- "/"
- "-"
What's the best way to achieve this. I have tried to use a REGEXP but this is returning valid if any of the characters are valid, not if all of the characters are valid.
Solution:1
You could negate using [^A-Z0-9/-]. If it matches you know there are invalid characters.
if (Regex.IsMatch("input",@"[^A-Z0-9/-]")) { //invalid character found } The character ^ inside the bracket negates the set, meaning "find anything thats not here".
Solution:2
Try:
@"^[A-Z0-9/-]*$" Or if you need to limit the number of characters:
@"^[A-Z0-9/-]{lowerbound,upperbound}$" Edit: Added start and end anchors
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