Non Printable Characters using C#

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Greyhound - 10 Apr 2008 21:20 GMT

I need to remove non-printable characters from a text file. I need to do
this in C#. The Hex codes for the characters I need to remove are '0C' and
'0A' which equate to 12 and 10 in decimal. Their codes are 'FF' and 'LF'
from the ASCII talbe. I have searched and searched and cannot come up with a
method for doing this.

Many Thanks...

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Jeroen Mostert - 10 Apr 2008 21:54 GMT

> I need to remove non-printable characters from a text file. I need to do
> this in C#. The Hex codes for the characters I need to remove are '0C' and
> '0A' which equate to 12 and 10 in decimal. Their codes are 'FF' and 'LF'
> from the ASCII talbe. I have searched and searched and cannot come up with a
> method for doing this.

Use a FileStream to read the existing file and a FileStream for creating the
new file. .Read() from one and .Write() to the other, skipping the unwanted
characters. A BufferedStream may improve performance.

Anything more and I'd be writing the code for you, and that would be bad.

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Jon Skeet [C# MVP] - 10 Apr 2008 23:04 GMT

Just read the text, then remove the appropriate characters using
something like string.Replace. The escape code for FF is "\f" and for
LF it's "\n".

Jon

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Arne Vajhøj - 11 Apr 2008 00:36 GMT

s = Regex.Replace(s, "[\f\n]", "");

or maybe:

s = Regex.Replace(s, "[\u0000-\u001F]", "");

Arne

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Non Printable Characters using C#

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