.net 3.5 - Allow only positive number with text input mask -

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I have a set of text input mask that is better than numbers 0-999 or better than 1-999 Allows

So I tried the mask "## 0", but unfortunately it also allows negative numbers too. Is there any way to allow only positive numbers?

Best regards, Anira

Until 9090 I understand your question. This will make space an allowed character for two first digits, and the last one must always have a number.


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