Hi,
As Mach58 pointed out, your report position is wrong and since StreamReader
is reading the the data as text you probably have some binary data making the
StreamReader return a null line prematurely. If you change the position you
should get the text. Alternately you could treat everything as a byte array
and extract necessary text using Encoding.ASCII.
Below is another way to do the same as your method. It uses a StringBuilder
to assemble the string. The reason for this was mainly due to using a
windows application and assembling everything to a single string object
before displaying it. It copies all the binary data to a byte array and uses
the byte array to read from instead of a stream. It isn't necessarily better
or worse reading from a byte array instead of a stream, but using a stream I
would probably use fs.Read and store the data in a byte arrays instead of
using a StreamReader.
StringBuilder sb = new StringBuilder();
int reportIdPosition = 877;
int custIdPosition = 1178;
int reportPosition = 2581;
byte[] data = File.ReadAllBytes(@"C:\TEST.BIN");
byte[] reportId = new byte[43];
byte[] custId = new byte[3];
byte[] report = new byte[data.Length - reportPosition];
// get report name
Array.Copy(data, reportIdPosition, reportId, 0, reportId.Length);
sb.AppendLine("ReportID: " + Encoding.ASCII.GetString(reportId));
// get customer ID
Array.Copy(data, custIdPosition, custId, 0, custId.Length);
sb.AppendLine("CustID: " + Encoding.ASCII.GetString(custId));
// get report
Array.Copy(data, reportPosition, report, 0, report.Length);
sb.AppendLine(Encoding.ASCII.GetString(report));
Console.WriteLine(sb.ToString());
--
Happy Coding!
Morten Wennevik [C# MVP]
"dm3281" wrote:
This is what I have so far and it kind of works for ReportID and CustID.
Then I try and do a ReadLine using streamreader and it re-reads the entire
file and prints the garbage at the beginning?
using System;
using System.IO;
namespace sample
{
public class test
{
static void Main()
{
FileStream fs = new FileStream(@"C:\TEMP\TEST.BIN",FileMode.Open);
// get report name
Console.Write("ReportID: ");
fs.Seek(877, SeekOrigin.Begin);
for (int i = 0; i < 43 && i < fs.Length; i++)
{
Console.Write((char) fs.ReadByte());
}
// get customer ID
Console.WriteLine();
Console.Write("CustID: ");
fs.Seek(1178, SeekOrigin.Begin);
for (int i = 0; i < 3 && i < fs.Length; i++)
{
Console.Write((char) fs.ReadByte());
}
StreamReader sr = new StreamReader(fs);
// jump to start of report
Console.WriteLine();
sr.BaseStream.Seek(1171,SeekOrigin.Begin);
//s.Seek(1171, SeekOrigin.Begin);
string str = sr.ReadLine();
while (str != null)
{
Console.WriteLine(str);
str = sr.ReadLine();
}
sr.Close();
fs.Close();
}
}
}
"dm3281" <dm****@nospam.netwrote in message
news:23**********************************@microsof t.com...
Hello, I have a text report from a mainframe that I need to parse.
The report has about a 2580 byte header that contains binary information
(garbage for the most part); although there are a couple areas that have
ASCII text that I need to extract. At the end of the 2580 bytes, I can
read the report like a standard text file. It should have CR/LF at the
end of each line.
What is the best way for me to read this report using C#. It is almost
like I need to access the file using seek() or something and then read it
using ReadLine() or something.
I have a sample file here. The extension is .BIN to cause your browser to
prompt for the file download.
http://members.verizon.net/dm3281/misc/TEST.BIN
Any assistance or sample code would be appreciated.
