Azavea.NijPredictivePolicing.ACSAlchemistLibrary.FileFormats.DesiredColumnsReader.ReadVariablesFile C# (CSharp) Method

        protected DataTable ReadVariablesFile(string filename, DataTable dt)
        {
            int line = 0;

            try
            {
                if (string.IsNullOrEmpty(_filename))
                {
                    if (!this.LoadFile(filename))
                    {
                        _log.ErrorFormat("ImportDesiredVariables failed: the file couldn't be read");
                    }
                }
                foreach (List<string> row in this)
                {
                    line++;     //base 1

                    if ((row.Count < 1) || (string.IsNullOrEmpty(row[0])) || (row[0].StartsWith("#")))
                    {
                        //skip blank lines / comments
                        continue;
                    }
                    if (row.Count > 2)
                    {
                        _log.WarnFormat("Line {0}: too many fields ({1}) provided, using first two", line, row.Count);
                    }

                    string variableID = row[0];
                    string variableAlias = (row.Count > 1) ? row[1] : row[0];
                    //string marginErrorAlias = Utilities.EnsureMaxLength(Settings.MoEPrefix + variableAlias, 10);
                    if (variableAlias.Length > 10)
                    {
                        _log.WarnFormat("Line {0}: \"{1}\" name was too long, truncating to 10 characters", line, variableAlias);
                        variableAlias = Utilities.EnsureMaxLength(variableAlias, 10);
                    }

                    //////Track duplicates
                    //AddIntToDict(columnConflicts, line, variableAlias, marginErrorAlias);
                    //IfSetAddIntToDict(reservedColumns, reservedConflicts, line, variableAlias, marginErrorAlias);

                    //uniqueColumnNames.Add(variableAlias);
                    //uniqueColumnNames.Add(marginErrorAlias);

                    dt.Rows.Add(variableID, variableAlias);//, marginErrorAlias, line);
                }
            }
            catch (Exception ex)
            {
                _log.Error("ReadVariablesFile: Exception thrown!", ex);
                _log.ErrorFormat("Variable Import made it to line {0}:{1}", filename, line);
            }

            return dt;
        }