예제 #1
0
        /// <summary>
        /// Writes a single row to a CSV file.
        /// </summary>
        /// <param name="row">The row to be written</param>
        public void WriteRow(PipeDelimitedRow row)
        {
            StringBuilder builder     = new StringBuilder();
            bool          firstColumn = true;

            foreach (string value in row)
            {
                // Add separator if this isn't the first value
                if (!firstColumn)
                {
                    builder.Append('|');
                }
                // Implement special handling for values that contain comma or quote
                // Enclose in quotes and double up any double quotes
                if (value.IndexOfAny(new char[] { '"' }) != -1)
                {
                    builder.AppendFormat("\"{0}\"", value.Replace("\"", "\"\""));
                }
                else if (value.IndexOfAny(new char[] { '|' }) != -1)
                {
                    builder.AppendFormat("\"{0}\"", value.Replace("|", ""));
                }
                else
                {
                    builder.Append(value);
                }
                firstColumn = false;
            }
            row.LineText = builder.ToString();
            WriteLine(row.LineText);
        }
예제 #2
0
        /// <summary>
        /// Reads a row of data from a CSV file
        /// </summary>
        /// <param name="row"></param>
        /// <returns></returns>
        public bool ReadRow(PipeDelimitedRow row)
        {
            row.LineText = ReadLine();
            if (String.IsNullOrEmpty(row.LineText))
            {
                return(false);
            }

            int pos  = 0;
            int rows = 0;

            while (pos < row.LineText.Length)
            {
                string value;

                // Special handling for quoted field
                if (row.LineText[pos] == '"')
                {
                    // Skip initial quote
                    pos++;

                    // Parse quoted value
                    int start = pos;
                    while (pos < row.LineText.Length)
                    {
                        // Test for quote character
                        if (row.LineText[pos] == '"')
                        {
                            // Found one
                            pos++;

                            // If two quotes together, keep one
                            // Otherwise, indicates end of value
                            if (pos >= row.LineText.Length || row.LineText[pos] != '"')
                            {
                                pos--;
                                break;
                            }
                        }
                        pos++;
                    }
                    value = row.LineText.Substring(start, pos - start);
                    value = value.Replace("\"\"", "\"");
                }
                else
                {
                    // Parse unquoted value
                    int start = pos;
                    while (pos < row.LineText.Length && row.LineText[pos] != '|')
                    {
                        pos++;
                    }
                    value = row.LineText.Substring(start, pos - start);
                }

                // Add field to list
                if (rows < row.Count)
                {
                    row[rows] = value;
                }
                else
                {
                    row.Add(value);
                }
                rows++;

                // Eat up to and including next comma
                while (pos < row.LineText.Length && row.LineText[pos] != '|')
                {
                    pos++;
                }
                if (pos < row.LineText.Length)
                {
                    pos++;
                }
            }
            // Delete any unused items
            while (row.Count > rows)
            {
                row.RemoveAt(rows);
            }

            // Return true if any columns read
            return(row.Count > 0);
        }