Date: Sun, 17 Oct 2004 10:48:56 GMT
Reply-To: Alan Churchill <REM0VETHISSTRINGTechSupport@SAVIAN.NET>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Alan Churchill <REM0VETHISSTRINGTechSupport@SAVIAN.NET>
Subject: Re: DCB-information on a PC-file
Jesper,
Posting Attempt # 3.
Look at the following code (C#):
StreamWriter writer=new StreamWriter(@"c:\temp\test.txt",
false,System.Text.Encoding.Unicode) ;
writer.Write("string without newline") ;
//Write a newline
writer.WriteLine() ;
for (int i=0;i<10;i++)
{
writer.WriteLine("string " + i.ToString() + " with newline") ;
}
//Write a chain of strings without newlines
for (int i=0;i<10;i++)
{
writer.Write("string " + i.ToString()) ;
}
//Write EOF and close
writer.Close() ;
This produces the following output:
string without newline
string 0 with newline
string 1 with newline
string 2 with newline
string 3 with newline
string 4 with newline
string 5 with newline
string 6 with newline
string 7 with newline
string 8 with newline
string 9 with newline
string 0string 1string 2string 3string 4string 5string 6string 7string 8string 9
As you can tell, there is lots of control on the PC side over the file contents.
Thanks,
Alan
Savian
"Bridging SAS and Microsoft technologies"
nntp://news.qwest.net/comp.soft-sys.sas/<7bb4f21d.0410160804.1d2b0b75@posting.google.com>
Hi Alan!
Thanks for your reply, I will study the article.
When writing to a simple text-file on a mainframe, you usually specify
the DCB-details for the file before writing. I don't understand how
the PC takes care of this automatically. How are record-length,
end-of-line markers etc. handled, if you don't specify this?
Guess I will have to read the article before asking more questions :-)
Regards,
Jesper
"Alan Churchill" <REM0VETHISSTRINGTechSupport@savian.net> wrote in message news:<_g3cd.924$dZ.81818@news.uswest.net>...
> Jesper,
>
> The file system handles it all for you on a PC. A possible source of info:
>
> http://www.pcguide.com/ref/hdd/file/ntfs/archFiles-c.html
>
> It really depends on what you are trying to do. I think a question along those lines might be easier to answer.
>
> Bear with me since it has been a few years since my MVS days and
coding DCBs…but on the mainframe, all resources need to be
allocated prior to use. The PC operates very differently in that
resources are demanded and received on the fly. Hence you have static
information, at that time, about a file but there aren't caps per se
on what it can hold. Also, I can call a picture a .gif or a .txt: the
extension is merely a ‘suggestion' but the file system
determines the type based upon an event (user click saying ‘open
this in an image editor) or a binary representation in the file.
>
> The article above describes accessing the file system for the info but I would be leery of going down this route w/o knowing more about what you are trying to do. SAS has some insights into the file system however there are other ways of getting much more information (including going through SAS to an O\S type of command).
>
> Thanks,
>
> Alan
>
>
>
> Savian
>
> "Bridging SAS and Microsoft technologies"
>
> www.savian.net
>
>
>
> nntp://news.qwest.net/comp.soft-sys.sas/<7bb4f21d.0410152127.6a0eef76@posting.google.com>
>
> Hi!
>
> On a mainframe-file I am used to specify a number of DCB-informations
> about a file, e.g. record length (LRECL), record format (VB, VBA, FB),
> block size (BLKSIZE) etc.
>
> But what about a PC-file? Is this information kept in the file-type,
> e.g. .txt, .doc, .xls, .sas etc.? Can't be the whole truth.
>
> How are PC-files in general organized (text- vs. binary-files etc.),
> and how do I retrieve this information?
>
> Regards,
> Jesper
>
>
> [comp.soft-sys.sas]
[comp.soft-sys.sas]
