Best way to clear contents of a stringbuilder object

[moondaddy]

Using c# 3.5, what's the best way to remove the contents of a stringbuilder
object? I was using this code:

sb.Remove(1, sb.Length - 1);

but when it had 9 carriage returns in it like this:
"\r\n\r\n\r\n\r \n\r\n\r\n\r\n\ r\n\r\n"

I got the error:
System.Argument OutOfRangeExcep tion: Length cannot be less than zero.
Parameter name: length at System.Text.Str ingBuilder.Remo ve(Int32 startIndex,
Int32 length)

You would think there would be a simple Clear() method.

Thanks.



--
moondaddy@newsg roup.nospam

[Jack Jackson]

Re: Best way to clear contents of a stringbuilder object

On Thu, 7 Feb 2008 11:40:43 -0600, "moondaddy"
<moondaddy@news group.nospamwro te:

>Using c# 3.5, what's the best way to remove the contents of a stringbuilder
>object? I was using this code:
>
>sb.Remove(1, sb.Length - 1);
>
>but when it had 9 carriage returns in it like this:
>"\r\n\r\n\r\n\ r\n\r\n\r\n\r\n \r\n\r\n"
>
>I got the error:
>System.Argumen tOutOfRangeExce ption: Length cannot be less than zero.
>Parameter name: length at System.Text.Str ingBuilder.Remo ve(Int32 startIndex,
>Int32 length)
>
>You would think there would be a simple Clear() method.
>
>Thanks.

If you want to remove everything, set Length = 0.

Your call to Remove should have left the first character, but would
give an error if there were no characters in the stringbuilder.

[Cor Ligthert[MVP]]

Re: Best way to clear contents of a stringbuilder object

Jon,

I am more and more happy when I see this kind of messages from you.

>
The important thing is that creating a new StringBuilder for each
iteration is simpler to understand. Unless this turns into a
performance bottleneck, you should use the simplest reasonable code and
not worry about micro-optimising. Clearing and reusing a StringBuilder
definitely counts as micro-optimisation - and it may well go wrong, as
the StringBuilder will end up in gen1 or gen2, rather than being
garbage collected quickly.
>

Absolutely my idea too.

Have a look at my reply too.

:-)

Cor

[Cor Ligthert[MVP]]

Re: Best way to clear contents of a stringbuilder object

Moondaddy,

The simplest method is in my idea to let it go out of scope.

Cor

[moondaddy]

Re: Best way to clear contents of a stringbuilder object

Thanks for the advice!


"Cor Ligthert[MVP]" <notmyfirstname @planet.nlwrote in message
news:FEA67EBB-8246-4F8D-9CAD-DBB50BE8C29F@mi crosoft.com...

Moondaddy,
>
The simplest method is in my idea to let it go out of scope.
>
Cor