Question on TRIM function

[mwazir]

Can someone please explain this to me

Dim str As String = Chr(12)
Debug.WriteLine(str) ' Output shows the line feed junk character

Dim iLen As Integer = str.Trim.Length
Debug.WriteLine(iLen) ' Output window shows 0

Dim iLenNoTrim As Integer = str.Length
Debug.WriteLine(iLenNoTrim) ' Output window shows 1

I thought Trim removes all leading and trailing spaces. I didnt understand
why Trim removes CHR(12).
CHR(12) is a line feed character

TIA

 

[Armin Zingler]

Can someone please explain this to me

Dim str As String = Chr(12)
Debug.WriteLine(str) ' Output shows the line feed junk
character

Dim iLen As Integer = str.Trim.Length
Debug.WriteLine(iLen) ' Output window shows 0

Dim iLenNoTrim As Integer = str.Length
Debug.WriteLine(iLenNoTrim) ' Output window shows 1

I thought Trim removes all leading and trailing spaces. I didnt
understand why Trim removes CHR(12).
CHR(12) is a line feed character

Have a look at the Trim documentation (the one without args): All chars are
removed where char.IsWhiteSpace returns True. See char.IsWhitespace docs on
what chars are "white spaces".


--
Armin

How to quote and why:
http://www.plig.net/nnq/nquote.html
http://www.netmeister.org/news/learn2quote.html

 

[Guest]

Hi

I do not know if you use ms.visualbasic...Trim or String.Trim. I'm not sure about ms.visualbasic...Trim
but System.String.Trim removes all white spaces. White spaces include characters like tab formfeed (chr(12)
cariage return (13) line feed (10) and so on.

Hope it help

Greating

Ras Alhague

 

[mwazir]

I am using System.String.Trim

Thanks for your response. I was under the impression that its only the
trailing and leading spaces.

Regards
--
Wazir

Hi,

I do not know if you use ms.visualbasic...Trim or String.Trim. I'm not

sure about ms.visualbasic...Trim,

but System.String.Trim removes all white spaces. White spaces include

characters like tab formfeed (chr(12))

 

[Herfried K. Wagner [MVP]]

Have a look at the Trim documentation (the one without args): All chars are
removed where char.IsWhiteSpace returns True. See char.IsWhitespace docs on
what chars are "white spaces".

'Char.IsWhiteSpace(Chr(12))' returns 'True' on my system.

 

[Armin Zingler]

'Char.IsWhiteSpace(Chr(12))' returns 'True' on my system.

Yes, that's why it is removed.

 

[Herfried K. Wagner [MVP]]

Yes, that's why it is removed.

Ooops. While reading your post I forgot that length actually /was/ 0
after trimming...