How to convert from EBCDIC to ASCII in C#.net

Question

I have a value in EBCDIC format \"000000{\". I want to convert it into a.Net Int32 type. Can anyone let me know what I can do about it?? So my question is given a string tha

Answer 1

These are the extension methods and unit test that we use:

    /// 

    /// parses a signed or unsigned decimal in EBCDIC format int an integer
    /// 
    /// 
    /// 
    private static int? FromZonedDecimalString(this string value)
    {
        var trimmed = ("" + value).Trim();
        if (trimmed.Length == 0)
            return null;

        int testValue;
        if (Int32.TryParse(trimmed, out testValue))
            return testValue;

        var lastChar = Convert.ToChar(trimmed.Substring(trimmed.Length - 1, 1));
        var result = 0;

        if (trimmed.Length > 1)
            result = Int32.Parse(trimmed.Substring(0, trimmed.Length - 1)) * 10;

        switch (lastChar)
        {
            case '{':
                return result;
            case '}':
                return -1 * result;
            default:
                if (lastChar >= 'A' && lastChar <= 'I')
                    return result + lastChar - 'A' + 1;
                if (lastChar >= 'J' && lastChar <= 'R')
                    return (result + lastChar - 'J' + 1) * -1;
                if (lastChar >= '0' && lastChar <= '9')
                    return (result + lastChar - '0' + 1) * -1;
                break;
        }
        return null;
    }

    /// 

    /// converts an integer value into zoned signed EBCDIC decimal format
    /// 
    /// 
    /// 
    public static string ToZonedSignedDecimalString(this int value)
    {
        var str = Math.Abs(value).ToString();
        str = str.Substring(0, str.Length - 1);
        var lastDigit = Math.Abs(value % 10);

        if (value < 0)
        {
            if (lastDigit == 0) return str + "}";
            if (lastDigit == 1) return str + "J";
            if (lastDigit == 2) return str + "K";
            if (lastDigit == 3) return str + "L";
            if (lastDigit == 4) return str + "M";
            if (lastDigit == 5) return str + "N";
            if (lastDigit == 6) return str + "O";
            if (lastDigit == 7) return str + "P";
            if (lastDigit == 8) return str + "Q";
            if (lastDigit == 9) return str + "R";

            throw new NotSupportedException("If this throws, I'm at a loss. Last digit was: " + lastDigit);
        }

        if (lastDigit == 0) return str + "{";
        if (lastDigit == 1) return str + "A";
        if (lastDigit == 2) return str + "B";
        if (lastDigit == 3) return str + "C";
        if (lastDigit == 4) return str + "D";
        if (lastDigit == 5) return str + "E";
        if (lastDigit == 6) return str + "F";
        if (lastDigit == 7) return str + "G";
        if (lastDigit == 8) return str + "H";
        if (lastDigit == 9) return str + "I";

        throw new NotSupportedException("If this throws, I'm at a loss. Last digit was: " + lastDigit);
    }


[TestClass]
public class IntExtensionsTests
{
    [TestMethod]
    public void TestConversion()
    {
        string signedDecimalString;
        int convertedlValue;
        for (int i = -1000001; i <= 1000001; i++)
        {
            signedDecimalString = i.ToZonedSignedDecimalString();
            convertedlValue = signedDecimalString.ConvertRightSignedJustifySignedValueToInt();

            Assert.AreEqual(i, convertedlValue);
        }
    }
}