120 lines
3.9 KiB
C#
120 lines
3.9 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using System.Windows;
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namespace ExtendedGrid.Classes
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{
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public static class ClipboardHelper
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{
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public delegate string[] ParseFormat(string value);
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public static List<string[]> ParseClipboardData()
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{
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List<string[]> clipboardData = null;
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object clipboardRawData = null;
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ParseFormat parseFormat = null;
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// get the data and set the parsing method based on the format
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// currently works with CSV and Text DataFormats
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IDataObject dataObj = Clipboard.GetDataObject();
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if (dataObj != null && (clipboardRawData = dataObj.GetData(DataFormats.CommaSeparatedValue)) != null)
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{
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parseFormat = ParseCsvFormat;
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}
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else if (dataObj != null && (clipboardRawData = dataObj.GetData(DataFormats.Text)) != null)
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{
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parseFormat = ParseTextFormat;
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}
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if (parseFormat != null)
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{
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var rawDataStr = clipboardRawData as string;
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if (rawDataStr == null && clipboardRawData is MemoryStream)
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{
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// cannot convert to a string so try a MemoryStream
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var ms = clipboardRawData as MemoryStream;
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var sr = new StreamReader(ms);
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rawDataStr = sr.ReadToEnd();
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}
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Debug.Assert(rawDataStr != null,
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string.Format(
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"clipboardRawData: {0}, could not be converted to a string or memorystream.",
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clipboardRawData));
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string[] rows = rawDataStr.Split(new[] {"\r\n"}, StringSplitOptions.RemoveEmptyEntries);
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if (rows.Length > 0)
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{
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clipboardData = rows.Select(row => parseFormat(row)).ToList();
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}
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else
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{
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Debug.WriteLine("unable to parse row data. possibly null or contains zero rows.");
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}
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}
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return clipboardData;
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}
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public static string[] ParseCsvFormat(string value)
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{
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return ParseCsvOrTextFormat(value, true);
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}
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public static string[] ParseTextFormat(string value)
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{
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return ParseCsvOrTextFormat(value, false);
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}
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private static string[] ParseCsvOrTextFormat(string value, bool isCsv)
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{
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var outputList = new List<string>();
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char separator = isCsv ? ',' : '\t';
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int startIndex = 0;
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int endIndex = 0;
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for (int i = 0; i < value.Length; i++)
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{
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char ch = value[i];
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if (ch == separator)
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{
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outputList.Add(value.Substring(startIndex, endIndex - startIndex));
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startIndex = endIndex + 1;
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endIndex = startIndex;
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}
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else if (ch == '\"' && isCsv)
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{
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// skip until the ending quotes
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i++;
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if (i >= value.Length)
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{
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throw new FormatException(string.Format("value: {0} had a format exception", value));
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}
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char tempCh = value[i];
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while (tempCh != '\"' && i < value.Length)
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i++;
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endIndex = i;
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}
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else if (i + 1 == value.Length)
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{
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// add the last value
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outputList.Add(value.Substring(startIndex));
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break;
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}
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else
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{
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endIndex++;
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}
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}
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return outputList.ToArray();
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}
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}
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}
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