/// <summary>
/// processing MT940 file
/// </summary>
/// <param name="filename"></param>
public void ProcessFile(string filename)
{
Console.WriteLine("Read file " + filename);
Int32 LineCounter = 0;
try
{
StreamReader reader = new StreamReader(filename, Encoding.GetEncoding(1252));
string fileContent = reader.ReadToEnd();
reader.Close();
string swiftTag = "";
string swiftData = "";
statements = new List <TStatement>();
currentStatement = null;
while (fileContent.Length > 0)
{
string line = ReadLine(ref fileContent);
LineCounter++;
if ((line.Length > 0) && (!line.StartsWith("-")))
{
// a swift chunk starts with a swiftTag, which is between colons
if (line.StartsWith(":"))
{
// process previously read swift chunk
if (swiftTag.Length > 0)
{
// Console.WriteLine(" Tag " + swiftTag + " Data " + swiftData);
HandleSwiftData(swiftTag, swiftData);
}
int posColon = line.IndexOf(":", 2);
swiftTag = line.Substring(1, posColon - 1);
swiftData = line.Substring(posColon + 1);
}
else
{
// the swift chunk is spread over several lines
swiftData = swiftData + line;
}
}
}
if (swiftTag.Length > 0)
{
HandleSwiftData(swiftTag, swiftData);
}
}
catch (Exception e)
{
throw new Exception(
"problem with file " + filename + "; line: " + LineCounter.ToString() + "; " + e.Message + Environment.NewLine + e.StackTrace);
}
}
private void HandleSwiftData(string swiftTag, string swiftData)
{
if (currentStatement != null)
{
currentStatement.lines.Add(new TLine(swiftTag, swiftData));
}
if (swiftTag == "OS")
{
// ignore
}
else if (swiftTag == "20")
{
// 20 is used for each "page" of the statement; but we want to put all transactions together
// the whole statement closes with 62F
if (currentStatement == null)
{
currentStatement = new TStatement();
currentStatement.lines.Add(new TLine(swiftTag, swiftData));
}
}
else if (swiftTag == "25")
{
int posSlash = swiftData.IndexOf("/");
currentStatement.bankCode = swiftData.Substring(0, posSlash);
currentStatement.accountCode = WithoutLeadingZeros(swiftData.Substring(posSlash + 1));
}
else if (swiftTag.StartsWith("60"))
{
// 60M is the start balance on each page of the statement.
// 60F is the start balance of the whole statement.
// first character is D or C
int DebitCreditIndicator = (swiftData[0] == 'D' ? -1 : +1);
// next 6 characters: YYMMDD
// next 3 characters: currency
// last characters: balance with comma for decimal point
currentStatement.currency = swiftData.Substring(7, 3);
decimal balance = DebitCreditIndicator * Convert.ToDecimal(swiftData.Substring(10).Replace(",",
Thread.CurrentThread.CurrentCulture.NumberFormat.CurrencyDecimalSeparator));
// we only want to use the first start balance
if (swiftTag == "60F")
{
currentStatement.startBalance = balance;
currentStatement.endBalance = balance;
}
else
{
// check if the balance inside the statement is ok
// ie it fits the balance of the previous page
if (Convert.ToDecimal(Math.Round(currentStatement.endBalance, 2)) != Convert.ToDecimal(balance))
{
throw new Exception("start balance does not match current balance");
}
}
}
else if (swiftTag == "28C")
{
// this contains the number of the statement and the number of the page
// only use for first page
if (currentStatement.transactions.Count == 0)
{
if (swiftData.IndexOf("/") != -1)
{
currentStatement.id = swiftData.Substring(0, swiftData.IndexOf("/"));
}
else
{
// realtime statement. do not use statement number 0, because Sparkasse has 0/1 for valid statements
currentStatement.id = string.Empty;
}
}
}
else if (swiftTag == "61")
{
TTransaction transaction = new TTransaction();
// valuta date (YYMMDD)
try
{
transaction.valueDate = new DateTime(2000 + Convert.ToInt32(swiftData.Substring(0, 2)),
Convert.ToInt32(swiftData.Substring(2, 2)),
Convert.ToInt32(swiftData.Substring(4, 2)));
}
catch (ArgumentOutOfRangeException)
{
// we have had the situation in the bank file with a date 30 Feb 2010.
// probably because the instruction by the donor is to transfer the money on the 30 day each month
// use the last day of the month
int year = 2000 + Convert.ToInt32(swiftData.Substring(0, 2));
int month = Convert.ToInt32(swiftData.Substring(2, 2));
int day = DateTime.DaysInMonth(year, month);
transaction.valueDate = new DateTime(year, month, day);
}
swiftData = swiftData.Substring(6);
if (char.IsDigit(swiftData[0]))
{
// posting date (MMDD)
transaction.inputDate = new DateTime(transaction.valueDate.Year,
Convert.ToInt32(swiftData.Substring(0, 2)),
Convert.ToInt32(swiftData.Substring(2, 2)));
swiftData = swiftData.Substring(4);
}
else
{
transaction.inputDate = transaction.valueDate;
}
// debit or credit, or storno debit or credit
int debitCreditIndicator = 0;
if (swiftData[0] == 'R')
{
// storno means: reverse the debit credit flag
debitCreditIndicator = (swiftData[1] == 'D' ? 1 : -1);
swiftData = swiftData.Substring(2);
}
else
{
debitCreditIndicator = (swiftData[0] == 'D' ? -1 : 1);
swiftData = swiftData.Substring(1);
}
// sometimes there is something about currency
if (Char.IsLetter(swiftData[0]))
{
// just skip it for the moment
swiftData = swiftData.Substring(1);
}
// the amount, finishing with N
transaction.amount =
debitCreditIndicator * Convert.ToDecimal(swiftData.Substring(0, swiftData.IndexOf("N")).Replace(",",
Thread.CurrentThread.CurrentCulture.NumberFormat.CurrencyDecimalSeparator));
currentStatement.endBalance += transaction.amount;
swiftData = swiftData.Substring(swiftData.IndexOf("N"));
// Geschaeftsvorfallcode
// transaction.typecode = swiftData.Substring(1, 3);
swiftData = swiftData.Substring(4);
// the following sub fields are ignored
// optional: customer reference; ends with //
// optional: bank reference; ends with CR/LF
// something else about original currency and transaction fees
currentStatement.transactions.Add(transaction);
}
else if (swiftTag == "86")
{
TTransaction transaction = currentStatement.transactions[currentStatement.transactions.Count - 1];
// Geschaeftsvorfallcode
transaction.typecode = swiftData.Substring(0, 3);
swiftData = swiftData.Substring(3);
char separator = swiftData[0];
swiftData = swiftData.Substring(1);
string[] elements = swiftData.Split(new char[] { separator });
foreach (string element in elements)
{
int key = 0;
string value = element;
try
{
key = Convert.ToInt32(element.Substring(0, 2));
value = element.Substring(2);
}
catch (Exception)
{
// if there is a question mark in the description, then we get here
}
if (key == 0)
{
// Buchungstext
transaction.text = value;
}
else if (key == 10)
{
// Primanotennummer; ignore at the moment
}
else if ((key >= 11) && (key <= 19))
{
// ignore, unknown meaning
}
else if ((key >= 20) && (key <= 29))
{
// do not insert a space between description lines
transaction.description += value;
}
else if (key == 30)
{
transaction.bankCode = value;
}
else if (key == 31)
{
// could use WithoutLeadingZeros, but then this must be stored in p_banking_details also without leading zeros
// which is not the case at the moment, and would increase complexity of sql queries
transaction.accountCode = value;
}
else if ((key == 32) || (key == 33))
{
transaction.partnerName += value;
}
else if (key == 34)
{
// Textschlüsselergänzung; ignore
}
else if ((key >= 60) && (key <= 63))
{
transaction.description += value;
}
else
{
throw new Exception("unknown key " + key.ToString());
}
}
}
else if (swiftTag.StartsWith("62"))
{
// 62M: finish page
// 62F: finish statement
int debitCreditIndicator = (swiftData[0] == 'D' ? -1 : 1);
swiftData = swiftData.Substring(1);
// posting date YYMMDD
DateTime postingDate = new DateTime(2000 + Convert.ToInt32(swiftData.Substring(0, 2)),
Convert.ToInt32(swiftData.Substring(2, 2)),
Convert.ToInt32(swiftData.Substring(4, 2)));
swiftData = swiftData.Substring(6);
// currency
swiftData = swiftData.Substring(3);
// sometimes, this line is the last line, and it has -NULNULNUL at the end
if (swiftData.Contains("-\0"))
{
swiftData = swiftData.Substring(0, swiftData.IndexOf("-\0"));
}
// end balance
decimal shouldBeBalance = debitCreditIndicator * Convert.ToDecimal(swiftData.Replace(",",
Thread.CurrentThread.CurrentCulture.NumberFormat.CurrencyDecimalSeparator));
currentStatement.endBalance = Math.Round(currentStatement.endBalance, 2);
if (Convert.ToDecimal(Math.Round(currentStatement.endBalance, 2)) != Convert.ToDecimal(shouldBeBalance))
{
throw new Exception("end balance does not match" +
" last transaction was: " + currentStatement.transactions[currentStatement.transactions.Count - 1].partnerName +
" balance is: " + currentStatement.endBalance.ToString() +
" but should be: " + shouldBeBalance.ToString());
}
if (swiftTag == "62F")
{
currentStatement.date = postingDate;
statements.Add(currentStatement);
currentStatement = null;
}
}
else if (swiftTag == "64")
{
// valutensaldo; ignore
}
else if (swiftTag == "65")
{
// future valutensaldo; ignore
}
else
{
Console.WriteLine("swiftTag " + swiftTag + " is unknown");
}
}
/// <summary>
/// this is useful to save an MT940 file after splitting by date
/// </summary>
/// <param name="AFilename"></param>
/// <param name="AStmt"></param>
public static void DumpMT940File(string AFilename, TStatement AStmt)
{
StreamWriter sw = new StreamWriter(AFilename, false, Encoding.Default);
foreach (TLine line in AStmt.lines)
{
sw.WriteLine(":" + line.swiftTag + ":" + line.swiftData);
}
sw.Close();
}
