How to block some punctuation in my code

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Hi everybody,

would somebody please guide me in finding out how to block some punctuation in my code?
I'd like to enter a floating point number and I don't want a comma with the point ".", but ¬
the comma with the real comma like this ", I have absolutely no idea of how to utilize regular ¬
expression for this.
My code looks something like this:

C#

float value = Convert.ToSingle(Console.Readline());
string rex = @"[0-9],";
// I don't know how to continue from here on

Can somebody please help me?

Stefan

Posted 16-Nov-12 0:53am

stefan from germany

Updated 16-Nov-12 1:18am

Manfred Rudolf Bihy

v4

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3 solutions

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André Kraak · Accepted Answer · 2012-11-16T01:08:00

Solution 2

This site http://www.regular-expressions.info/[^] has all kinds off regular expressions, including for floating points www.regular-expressions.info/floatingpoint.html[^].
Just replace the point in the sample with a comma.

Posted 16-Nov-12 1:08am

André Kraak

Comments

stefan from germany 17-Nov-12 6:45am

thx André it help me so much

OriginalGriff · Accepted Answer · 2012-11-16T01:03:00

Solution 1

Try:

[+-]?\d+\,\d+

Posted 16-Nov-12 1:03am

OriginalGriff

Comments

stefan from germany 16-Nov-12 7:07am

but how to verify it now with my if statement?

OriginalGriff 16-Nov-12 7:15am

if (Regex.IsMatch("123,456", @"[+-]?\d+\,\d+"))
{
Console.WriteLine("Matched");
}

stefan from germany 17-Nov-12 6:45am

thx

CafedeJamaica · Accepted Answer · 2012-11-16T02:30:00

Solution 3

I just read this yesterday and it makes regular expressions really simple

Learn Regular Expressions (RegEx) with Ease[^]

Posted 16-Nov-12 2:30am

CafedeJamaica