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AnswerRe: how to make username regex for windows forms Pin
Kenneth Haugland30-Sep-12 23:32
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GeneralRe: how to make username regex for windows forms Pin
sariqkhan1-Oct-12 0:11
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GeneralRe: how to make username regex for windows forms Pin
Richard MacCutchan1-Oct-12 0:44
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AnswerRe: how to make username regex for windows forms Pin
Manfred R. Bihy2-Oct-12 3:11
mvpManfred R. Bihy2-Oct-12 3:11 
GeneralRe: how to make username regex for windows forms Pin
sariqkhan2-Oct-12 8:22
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GeneralRe: how to make username regex for windows forms Pin
Manfred R. Bihy4-Oct-12 0:10
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GeneralRe: how to make username regex for windows forms Pin
sariqkhan4-Oct-12 0:27
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GeneralRe: how to make username regex for windows forms Pin
Manfred R. Bihy4-Oct-12 1:44
mvpManfred R. Bihy4-Oct-12 1:44 
Above you said: "I mean allowing only one dot dash or underscore in a row?".
The meaning of "in a row" is that the characters consecutively follow one another with out other characters in between.
If you meant that there should be at most one "-" and at most one "." and at most one "_", you should have said so. Smile | :)

I don't think this is possible to achieve using regular expressions. You'd have to iterate over the characters and increment a counter for each of the three characters "-", "." and "_". As soon a one of the counters is greater than one the check already failed and you don't need to use the regulare expression.

Regards,

Manfred
"I had the right to remain silent, but I didn't have the ability!"
Ron White, Comedian


GeneralRe: how to make username regex for windows forms Pin
sariqkhan4-Oct-12 1:55
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GeneralRe: how to make username regex for windows forms Pin
Manfred R. Bihy4-Oct-12 2:01
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GeneralRe: how to make username regex for windows forms Pin
Peter_in_27804-Oct-12 3:51
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Question[SOLVED] C Code Parsing Pin
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QuestionRename File Name Help Pin
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QuestionSwap two values based on pattern Pin
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