解析Quickbook IIF格式文件

我做的:

 public DataSet parseIIF(Stream file) {
            iifSet = new DataSet();
            String fileText;

            using (StreamReader sr = new StreamReader(file)) {
                fileText = sr.ReadToEnd();
            }
            //replace line breaks with tabs
            //fileText.Replace('\n', '\t');
            fileText = fileText.Replace("\r\n", "\n");
            fileText = fileText.Replace('\r', '\n');

            //split along tabs
            string[] lines = fileText.Split('\n');

            this.createTables(lines, iifSet);
            this.fillSet(lines, iifSet);

            return iifSet;
        }

        /// 

        /// Reads an array of lines and parses them into tables for the dataset
        /// 
        /// String Array of lines from the iif file
        /// DataSet to be manipulated
        private void fillSet(string[] lines, DataSet set) {
            //CODING HORROR
            //WARNING: I will monkey with the for loop index, be prepared!
            for (int i = 0; i < lines.Length; i++) {
                if (this.isTableHeader(lines[i])) {
                    //ignore this line, tables are alread defined
                    continue;
                }
                if (lines[i] == "" || lines[i] == "\r" || lines[i] == "\n\r" || lines[i] == "\n") {
                    //ignore lines that are empty if not inside a record
                    //probably the end of the file, it always ends with a blank line break
                    continue;
                }

                if (lines[i].IndexOf(";__IMPORTED__") != -1) {
                    continue;
                    //just signifying that it's been imported by quickbook's timer before, don't need it
                }

                string line = lines[i];
                while (!isFullLine(line, set)){
                    i++;            //<--------------------------- MONKEYING done here!
                    line += lines[i];       
                }
                //now, the line should be complete, we can parse it by tabs now
                this.parseRecord(line, set);
            }
        }

        private void parseRecord(string line, DataSet set) {
            if (isTableHeader(line)) {
                //we don't want to deal with headers here
                return;
            }

            String tablename = line.Split('\t')[0];
            //this just removes the first value and the line break from the last value
            String[] parameters = this.createDataRowParams(line);

            //add it to the dataset
            set.Tables[tablename].Rows.Add(parameters);
        }

        private bool isFullLine(string line, DataSet set) {
            if (isTableHeader(line)) {
                return true;    //assumes table headers won't have line breaks
            }
            int values = line.Split('\t').Length;
            string tableName = line.Split('\t')[0];
            int columns = set.Tables[tableName].Columns.Count;

            if (values < columns) {
                return false;
            } else {
                return true;
            }
        }

        private void createTables(string[] lines, DataSet set) {
            for (int index = 0; index < lines.Length; index++) {
                if (this.isTableHeader(lines[index])) {
                    set.Tables.Add(createTable(lines[index]));
                }
            }
        }

        private bool isTableHeader(string tab) {
            if (tab.StartsWith("!"))
                return true;
            else
                return false;
        }

        private bool isNewLine(string p) {
            if (p.StartsWith("!"))
                return true;
            if (iifSet.Tables[p.Split('\t')[0]] != null)    //that little mess there grabs the first record in the line, sorry about the mess
                return true;
            return false;
        }

    private DataTable createTable(string line) {
        String[] values = line.Split('\t');

        //first value is always the title
        //remove the ! from it
        values[0] = values[0].Substring(1);     //remove the first character
        DataTable dt = new DataTable(values[0]);
        values[0] = null;   //hide first title so it doesn't get used, cheaper than resetting array
        foreach (String name in values) {
            if (name == null || name == "")
                continue;
            DataColumn dc = new DataColumn(name, typeof(String));
            try {
                dt.Columns.Add(dc);
            } catch (DuplicateNameException) {
                //odd
                dc = new DataColumn(name + "_duplicateCol" + dt.Columns.Count.ToString());
                dt.Columns.Add(dc);
                //if there is a triple, just throw it
            }
        }

        return dt;
    }

   private string getTableName(string line) {
        String[] values = line.Split('\t');

        //first value is always the title
        if(values[0].StartsWith("!")){
            //remove the ! from it
            values[0] = values[0].Substring(1);     //remove the first character
        }
        return values[0];
    }

    private string[] createDataRowParams(string line) {
        string[] raw = line.Split('\t');
        string[] values = new string[raw.Length - 1];

        //copy all values except the first one
        for (int i = 0; i < values.Length; i++) {
            values[i] = raw[i + 1];
        }

        //remove last line break from the record
        if (values[values.Length - 1].EndsWith("\n")) {
            values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf('\n'));
        } else if (values[values.Length - 1].EndsWith("\n\r")) {
            values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf("\n\r"));
        } else if (values[values.Length - 1].EndsWith("\r")) {
            values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf('\r'));
        }


        return values;
    }

    private string[] createDataRowParams(string line, int max) {
        string[] raw = line.Split('\t');

        int length = raw.Length - 1;
        if (length > max) {
            length = max;
        }

        string[] values = new string[length];
        for (int i = 0; i < length; i++) {
            values[i] = raw[i + 1];
        }

        if (values[values.Length - 1].EndsWith("\n")) {
            values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf('\n'));
        } else if (values[values.Length - 1].EndsWith("\n\r")) {
            values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf("\n\r"));
        } else if (values[values.Length - 1].EndsWith("\r")) {
            values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf('\r'));
        }

        return values;
    }