ReadLine() from multiline string variable

[=?Utf-8?B?c2FtMDFt?=]

just as the subject states, I need to find a way to read each line from a
multiline variable without having to write the string out to a file so I can
stream it in and use ReadLine(). Below is a snippet of code where I am trying
to read the string that has been passed into the function.


//source is the string of data to parse out
//nodes is the Xml Node Name in the mappingFile
("/Meters/Ion/Report/Field")
//ReadLine indicates whether to process line by line, or read as
continuous string
public List<List<Field s>GetNodeData(s tring source, string node,
Boolean ReadLine)
{
//Get the field mappings.
List<Fieldsreco rd = GetFields(node) ;

List<List<Field s>records = new List<List<Field s>>();

using (StreamReader sr = new StreamReader(so urce))
{
//this is the string of data to process
string contents = sr.ReadLine();

while (sr.Peek() >= 0)
{...

[Bruce Wood]

Re: ReadLine() from multiline string variable

On Jul 19, 7:42 pm, sam01m <sam...@newsgro ups.nospamwrote :

just as the subject states, I need to find a way to read each line from a
multiline variable without having to write the string out to a file so I can
stream it in and use ReadLine(). Below is a snippet of code where I am trying
to read the string that has been passed into the function.
>
//source is the string of data to parse out
//nodes is the Xml Node Name in the mappingFile
("/Meters/Ion/Report/Field")
//ReadLine indicates whether to process line by line, or read as
continuous string
public List<List<Field s>GetNodeData(s tring source, string node,
Boolean ReadLine)
{
//Get the field mappings.
List<Fieldsreco rd = GetFields(node) ;
>
List<List<Field s>records = new List<List<Field s>>();
>
using (StreamReader sr = new StreamReader(so urce))
{
//this is the string of data to process
string contents = sr.ReadLine();
>
while (sr.Peek() >= 0)
{...

Try looking into the StringReader class.

[=?Utf-8?B?c2FtMDFt?=]

RE: ReadLine() from multiline string variable


Excellent, thank you (both) for the information. the only problem I'm
finding with ReadLine() though, in either implementation (StreamReader or
StringReader), is that I'm finding it strips out trailing whitespace. I have
preformatted data to be of a very specific length, whereby sometimes the last
two spaces have values, but more often than not, they are blank.

...........exam ple line of data:

" 13:00SI 137.76 11.37 .00 4.01 "

...........when read through ReadLine() evaluates like this:

" 13:00SI 137.76 11.37 .00 4.01"

...........prob lem is, sometimes the input data looks like this:

" 13:00SI 137.76AD 11.37AD .00AD 4.01AD"

...........in any case, I need a fixed string length when I parse out each
ReadLine()

Any ideas?

[=?UTF-8?B?R8O2cmFuIEFuZGVyc3Nvbg==?=]

Re: ReadLine() from multiline string variable

sam01m wrote:

Excellent, thank you (both) for the information. the only problem I'm
finding with ReadLine() though, in either implementation (StreamReader or
StringReader), is that I'm finding it strips out trailing whitespace. I have
preformatted data to be of a very specific length, whereby sometimes the last
two spaces have values, but more often than not, they are blank.
>
..........examp le line of data:
>
" 13:00SI 137.76 11.37 .00 4.01 "
>
..........when read through ReadLine() evaluates like this:
>
" 13:00SI 137.76 11.37 .00 4.01"
>
..........probl em is, sometimes the input data looks like this:
>
" 13:00SI 137.76AD 11.37AD .00AD 4.01AD"
>
..........in any case, I need a fixed string length when I parse out each
ReadLine()
>
Any ideas?
>

How have you determined that the ReadLine method removes the spaces?

I tried this code, and it shows that the spaces are not removed:

string input = " a\r\na \r\n a \r\na a\r\na";
using (StringReader reader = new StringReader(in put)) {
while ((line = reader.ReadLine ()) != null) {
Console.WriteLi ne(line.Length. ToString());
}
}

Output:
3
3
3
3
1

--
Göran Andersson
_____

http://www.guffa.com

[=?Utf-8?B?c2FtMDFt?=]

RE: ReadLine() from multiline string variable

Here is my code:

public void GetNodeData(str ing source, string node, Boolean ReadLine)
{
using (StringReader sr = new StringReader(so urce))
{
string contents;

if (ReadLine == true)
{
contents = sr.ReadLine();
}
else
{
contents=sr.Rea dToEnd();
}

while (contents != null)
{

contents = sr.ReadLine();
}
}
}


Here is the input string taken directly from the "source" variable at
runtime. Notice that each line contains two spaces just before \r:

" 11:00 147.02 8.24 .00 1.80 \r\n
12:00 137.22 9.47 .00 3.29 \r\n
13:00SI 137.76 11.37 .00 4.01 \r"


Here is the result of "contents = sr.ReadLine();"

" 11:00 147.02 8.24 .00 1.80 "
" 12:00 137.22 9.47 .00 3.29 "
" 13:00SI 137.76 11.37 .00 4.01 "

Hmmm.... I stand corrected, my apologies!