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C# code to parse an x9.37 file

The following C# code will parse an X937 file (Image Cash Letter) and get the amounts of each check

// BigEndianBitConverter class taken from http://www.yoda.arachsys.com/csharp/miscutil/

        // ConvertEBCDICtoASCII method taken from http://kseesharp.blogspot.com/2007/12/convert-ebcdic-to-ascii.html

        static void Main(string[] args)

        {

            var input = new BinaryReader(new FileStream("YourICLFile.icl",FileMode.Open));

            byte[] amount_bytes, record_type_bytes;

            byte[] record_lenght_bytes = input.ReadBytes(4);

            var converter = new BigEndianBitConverter();

            int record_lenght = converter.ToInt32(record_lenght_bytes,0);

            string record_type, amount_str;

 

            //Totals

            long check_items= 0, total_amount = 0;

            try

            {

 

                while (true)

                {

                    //Get record type

                    record_type_bytes = input.ReadBytes(2);

                    record_type = ConvertEBCDICtoASCII(record_type_bytes);

                    if (record_type == "99") //file control (end of file)

                        break;

 

                    if (record_type == "25") //check detail

                    {

                        check_items++;

                        input.ReadBytes(45); //move the stream's position to the field containing the amount of the check

                        amount_bytes = input.ReadBytes(10);

                        amount_str = ConvertEBCDICtoASCII(amount_bytes);

                        Console.Out.WriteLine(check_items);

                        Console.Out.WriteLine("$ " + amount_str);

                        total_amount += long.Parse(amount_str);

                        input.ReadBytes(record_lenght - (2 + 45 + 10)); //move the stream's position to the next record

                    }

                    else

                    {

                        input.ReadBytes(record_lenght - 2); //move the stream's position to the next record

                    }

                   

 

                    //Get next record's size

                    record_lenght_bytes = input.ReadBytes(4);

                    record_lenght = converter.ToInt32(record_lenght_bytes, 0);

                }

            }

            catch (EndOfStreamException end)

            {

 

            }

            finally

            {

                input.Close();

            }

 

            Console.Out.WriteLine("Number of items: " + check_items);

            Console.Out.WriteLine("$ " + ((decimal)total_amount / (decimal)100));

            Console.ReadLine();

        }

Please note that the code above is for demonstration purposes, you can optimize the reading of the file by using File.OpenRead.

Comments

Anonymous said…
Hi, thank you for your post. Can you tell me how you got past the fact that the ConvertEBCDICtoASCII function requires a string argument, you are passing "record_type_bytes" which is of 'byte[]' type.
Thanks again
1:15 PM
Juan Pablo said…
Just change the strEBCDICString parameter to be byte[]. Then change the lines of the method to use the array instead of a string. E.g.: instead of Convert.ToChar(strEBCDICString.Substring(i, 1)) you should be able to do something like this: (char)strEBCDICString[i].
6:36 PM
Anonymous said…
Hi I want help on this. Anybody here to help
10:52 AM
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