Parsing numbers at PreviewTextInput

Posted by Nitin Chaudhari on Stack Overflow See other posts from Stack Overflow or by Nitin Chaudhari
Published on 2010-06-08T12:31:08Z Indexed on 2010/06/08 12:42 UTC
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c#

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parsing

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numbers

I have a WPF application in which I have a hook at PreviewTextInput, through that I get the currently entered character and I have the string already entered. Given this I need to write the following function :

bool ShouldAccept(char newChar,string existingText)

existingText can be comma seperated valid numbers(including exponential) and it should just return false when invalid characters are pressed.

My code(if else based) currently has a lot of flaws, I wanted to know if there is any smart way to do it.

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