This code is written in C# to convert EBCDIC to ASCII
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;
namespace ConsoleApplication1
{
class Program
{
static void Main()
{
StreamReader sr = new StreamReader("d:\\LAB\\CXAR2.block.txt");
StreamWriter sw = new StreamWriter("d:\\LAB\\CXAR2.DAT.ascii");
EBCDIC2ASCII obj = new EBCDIC2ASCII();
string line = "";
//char[] buffer=new char[256];
//byte[] bufferByte = new byte[256];
int i = 0;
while (!(sr.EndOfStream))
{
line = sr.ReadLine();
byte[] bufferByte = obj.EBCDIC_1(line);
char[] buffer = new char[bufferByte.Length - 1];
for (i = 0; i < bufferByte.Length - 1; i++)
{
buffer[i] = (char)bufferByte[i];
}
sw.WriteLine(buffer);
}
sr.Close();
sw.Close();
}
}
class EBCDIC2ASCII
{
public byte[] EBCDIC_1(string line)
{
string ebcdicTable = "@KMNPZ[\\]^_`akloz{|}ÀÁÂÃÄÅÆÇÈÉÑÒÓÔÕÖ×ØÙàâãäåæçèéðñòóôõö÷øùЂƒ„…†‡ˆ‰‘’“”•–—˜™¢£¤¥¦§¨©¬mjnLº»°~";
string asciiTable = " .(+&!$*); -/,%?:#@'\"{ABCDEFGHIJKLMNOPQR\\STUVWXYZ0123456789}abcdefghijklmnopqrstuvwxyzD_|><[]^=";
const byte space = (byte)32;
const byte tilde = (byte)126;
Regex rx = new Regex("");
string[] inBufChar = rx.Split(line);
List<char> lstInBuff = new List<char>();
List<byte> lstInBuff_Byte = new List<byte>();
char chrInBuff;
int i = 0;
for (i = 0; i < inBufChar.Length - 1; i++)
{
if (inBufChar[i] == "") { continue; }
chrInBuff =char.Parse(inBufChar[i]);
lstInBuff_Byte.Add((byte)chrInBuff);
}
//char[] inBufChar1 = new char[256];
byte[] inBuf = lstInBuff_Byte.ToArray();
byte[] outBuf = new byte[inBuf.Length-1];
for ( i = 0; i < line.Length-1; i++)
{
int inCharPos = ebcdicTable.IndexOf((char)inBuf[i]);
if (inCharPos == -1)
{
// Unknown EBCDIC character
outBuf[i] = space;
}
else
{
outBuf[i] = (byte)asciiTable[inCharPos];
if (outBuf[i] < space ||
outBuf[i] > tilde)
{
// Out of range ASCII character.
// Should never happen, as the translation table
// has no control or high-order characters on the
// output side ... but, just in case.
outBuf[i] = space;
}
}
}
return outBuf;
}
public byte[] EBCDICToASCIIFile(byte[] buffer,int recordLength)
{
byte[] outBuffer = BuildRecord(buffer, recordLength);
//fsOut.Write(outBuffer, 0, outBuffer.Length);
return outBuffer;
}
protected byte[] BuildRecord(byte[] buf, int record)
{
byte[] outBuf = new byte[256]; // Output record length
int outPos = 0;
outPos += CopyRange(buf, outBuf, 0, 12, outPos); // Cust ID, district
if (outPos != outBuf.Length - 2)
{
//throw new ApplicationException(String.Format("BuildRecord(): Internal error at record {0}: {1} bytes have been written to output record, should be {2}.",
//record,
//outPos,
//outBuf.Length - 2));
}
// Add CR/LF
outBuf[outBuf.Length - 2] = (byte)13;
outBuf[outBuf.Length - 1] = (byte)10;
return outBuf;
}
protected int CopyRange(byte[] inBuf,
byte[] outBuf,
int start,
int length,
int outStart)
{
string ebcdicTable = "@KMNPZ[\\]^_`akloz{|}ÀÁÂÃÄÅÆÇÈÉÑÒÓÔÕÖ×ØÙàâãäåæçèéðñòóôõö÷øùЂƒ„…†‡ˆ‰‘’“”•–—˜™¢£¤¥¦§¨©¬mjnLº»°~";
string asciiTable = " .(+&!$*); -/,%?:#@'\"{ABCDEFGHIJKLMNOPQR\\STUVWXYZ0123456789}abcdefghijklmnopqrstuvwxyzD_|><[]^=";
const byte space = (byte)32;
const byte tilde = (byte)126;
for (int i = 0; i < length; i++)
{
int outPos = outStart + i;
int inCharPos = ebcdicTable.IndexOf((char)inBuf[start + i]);
if (inCharPos == -1)
{
// Unknown EBCDIC character
outBuf[outPos] = space;
}
else
{
outBuf[outPos] = (byte)asciiTable[inCharPos];
if (outBuf[outPos] < space ||
outBuf[outPos] > tilde)
{
// Out of range ASCII character.
// Should never happen, as the translation table
// has no control or high-order characters on the
// output side ... but, just in case.
outBuf[outPos] = space;
}
}
}
return length;
}
}
} 
