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Parsing through a pipe delimited File

Posted on 2010-09-23
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Last Modified: 2012-05-10
Hello Everyone,

In the sample code I supplied, I and using a StreamReader to read a pipe delimited file. A sample of the file looks like this:

11517838|05   |F |01|2041|Y|0.1500|N| \n 11517838|05   |F |01|2042|Y|0.1500|N| \n11517838|05   |F |01|2044|Y|0.1500|N| \n11517838|05   |F |01|2047|Y|0.1500|N| \n11517838|05   |F |01|2049|Y|0.1500|N| \n

In the file, they are all on one line, with the newline character after the |N|. What I need to be able to do, is read the whole file into a string array like I have shown, but then I need to go 'line' by 'line' to populate some string variables. Right now when I run my code, it will go in and get the first:

11517838|05   |F |01|2041|Y|0.1500|N|

from the file, but when it goes in for the second iteration, It does not move to the next line, aka, the character after the newline mark. Thanks in advance for your help.
StreamReader sr = new StreamReader(dailyAudit.ToString());
                        auditLine = sr.ReadToEnd();
                        string auditContents = auditLine;
                        string[] lines = auditContents.Split(char.Parse("|"));
                        int x = 1;
                        
                        while (x < lines.Length && lines[x].ToString() != "\n")
                       {
                            x++;
                            string MID = lines[0];
                            string Vendor = lines[1];
                            string VendType = lines[2];
                            string CardID = lines[3];
                            string ChargeType = lines[4];
                            string RateType = lines[5];
                            string Amount = lines[6];
                            string ExcessRol = lines[7];
                            string FileDate = ftpDate;
                       }

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Question by:Abacus IT
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10 Comments
 
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Expert Comment

by:Umar Topia
ID: 33744170
Instead of this
you use streamreader to read the file
and then use object of streamreader srObj.ReadLine() to read line by line
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Author Comment

by:Abacus IT
ID: 33744213
So, I could change the code to look like:
StreamReader sr = new StreamReader(dailyAudit.ToString());
                        auditLine = sr.ReadLine();
                        string auditContents = auditLine;
                        string[] lines = auditContents.Split(char.Parse("|"));
                        while (sr.ReadLine() != null)
                       {
                            string MID = lines[0];
                            string Vendor = lines[1];
                            string VendType = lines[2];
                            string CardID = lines[3];
                            string ChargeType = lines[4];
                            string RateType = lines[5];
                            string Amount = lines[6];
                            string ExcessRol = lines[7];
                            string FileDate = ftpDate;

                       }

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Author Comment

by:Abacus IT
ID: 33744287
Edit to that last code sample:

while (sr.ReadLine() != null)
                       {    
                            string auditContents = auditLine;
                            string[] lines = auditContents.Split(char.Parse("|"));
                           
                            string MID = lines[0];
                            string Vendor = lines[1];
                            string VendType = lines[2];
                            string CardID = lines[3];
                            string ChargeType = lines[4];
                            string RateType = lines[5];
                            string Amount = lines[6];
                            string ExcessRol = lines[7];
                            string FileDate = ftpDate;

                       }
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LVL 1

Author Comment

by:Abacus IT
ID: 33745052
So I totally changed my code to read as you see below. Problem is that it still won't move on to the next line in the file.
while (sr.ReadLine() != null)
                        {
                            string[] lines = sr.ReadLine().Split(char.Parse("|"));

                            string MID = lines[0];
                            string Vendor = lines[1];
                            string VendType = lines[2];
                            string CardID = lines[3];
                            string ChargeType = lines[4];
                            string RateType = lines[5];
                            string Amount = lines[6];
                            string ExcessRol = lines[7];
                            string FileDate = ftpDate;
                        }

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Assisted Solution

by:kris_per
kris_per earned 250 total points
ID: 33745554

Use it like below:


while (true)
                        {
string aLine = sr.ReadLine();
if(aLine == null) break;

                            string[] lines = aLine.Split("|");

                            string MID = lines[0];
                            string Vendor = lines[1];
                            string VendType = lines[2];
                            string CardID = lines[3];
                            string ChargeType = lines[4];
                            string RateType = lines[5];
                            string Amount = lines[6];
                            string ExcessRol = lines[7];
                            string FileDate = ftpDate;
                        }

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Accepted Solution

by:
kris_per earned 250 total points
ID: 33745587

I mean, as below:

StreamReader sr = new StreamReader(dailyAudit.ToString());

while (true)
      {
             string aLine = sr.ReadLine();
             if(aLine == null) break;

                            string[] lines = aLine.Split("|");

                            string MID = lines[0];
                            string Vendor = lines[1];
                            string VendType = lines[2];
                            string CardID = lines[3];
                            string ChargeType = lines[4];
                            string RateType = lines[5];
                            string Amount = lines[6];
                            string ExcessRol = lines[7];
                            string FileDate = ftpDate;
                        }

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Expert Comment

by:Todd Gerbert
ID: 33745589
You can use File.ReadAllLines to get a string array, where each item in the array represents one line in the file.  Then loop through that array, and split each individual line on the | character to get the fields.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace ConsoleApplication1
{
	class Program
	{
		static void Main(string[] args)
		{
			string[] lines = File.ReadAllLines("C:\\test.txt");

			foreach (string line in lines)
			{
				string[] fields = line.Split('|');

				string one = fields[0];
				string two = fields[1];
				string three = fields[2];
				string four = fields[3];
			}
		}
	}
}

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Expert Comment

by:Todd Gerbert
ID: 33745645
Sorry...didn't catch that your using a StreamReader on a string variable.  If File.ReadAllLines doesn't work in your case, you can just use Split('\n') on dailyAudit.ToString().
...what is dailyAudit?  Maybe the problem is that dailyAudit only has one line in it?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace ConsoleApplication1
{
	class Program
	{
		static void Main(string[] args)
		{
			string dailyAudit = "The|Quick|Brown|Fox\nJumped|Over|The|Lazy\nDog|Hello|World|Test\n";

			string[] lines = dailyAudit.ToString().Split('\n');

			foreach (string line in lines)
			{
				string[] fields = line.Split('|');

				string one = fields[0];
				string two = fields[1];
				string three = fields[2];
				string four = fields[3];
			}
		}
	}
}

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Author Comment

by:Abacus IT
ID: 33746485
@Kris_per, I tried your code, and it is doing exactly what I need it to. Thank you very much for all the help everyone.
0
 
LVL 1

Author Closing Comment

by:Abacus IT
ID: 33746498
Question was answered exactly as I needed it to be.
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