107 lines
3.4 KiB
C#
107 lines
3.4 KiB
C#
// Copyright (c) 2022- schick Informatik
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// Description: Compares excel files and highlights changes
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//
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using System;
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using System.IO;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Drawing;
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using Microsoft.Office.Interop.Excel;
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namespace ENI2.Excel
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{
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/// <summary>
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/// Diese Klasse beinhaltet den von Anmeldungen unabhängigen Vergleich von Excel Sheets. Damit
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/// können dann Updates von "außen" einfacher abgearbeitet werden. Zellen und sheets werden bei
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/// Aktualisierung bunt eingefärbt
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/// </summary>
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public static class ExcelComparer
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{
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private static int diffColor = ColorTranslator.ToOle(Color.FromArgb(150, 150, 255)); // blue
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private static bool GetSheetRange(Worksheet sheet, out int lastUsedRow, out int lastUsedColumn)
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{
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try
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{
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Range last = sheet.Cells.SpecialCells(XlCellType.xlCellTypeLastCell, Type.Missing);
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Range range = sheet.get_Range("A1", last);
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lastUsedRow = last.Row;
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lastUsedColumn = last.Column;
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return true;
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}
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catch(Exception)
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{
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lastUsedColumn = 0;
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lastUsedRow = 0;
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return false;
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}
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}
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public static string Compare(string sourcePath, string targetPath, out string errorMessage)
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{
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string fileName = Path.GetTempPath() + Guid.NewGuid().ToString() + ".xlsx";
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errorMessage = "";
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int counter = 0;
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try
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{
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File.Copy(targetPath, fileName);
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ExcelReader source = new ExcelReader(sourcePath);
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ExcelReader comparison = new ExcelReader(fileName, false);
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/*
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// loop through named cells
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foreach (string name in comparison.NameDict.Keys)
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{
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if (!source.NameDict.ContainsKey(name)) continue;
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string sourceText = source.ReadText(name);
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string targetText = comparison.ReadText(name);
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if (sourceText == null)
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{
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if (targetText != null)
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{
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comparison.Colorize(name, diffColor);
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counter++;
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}
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}
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else if (targetText == null)
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{
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if (sourceText != null)
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{
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comparison.Colorize(name, diffColor);
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counter++;
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}
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}
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else if ((sourceText != null) && (targetText != null))
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{
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if (!sourceText.Equals(targetText))
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{
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// turn cell blue
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comparison.Colorize(name, diffColor);
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counter++;
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}
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}
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}
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*/
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comparison.Save(fileName);
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errorMessage = string.Format("{0} differences found", counter);
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}
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catch (Exception ex)
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{
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errorMessage = ex.Message;
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}
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return fileName;
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}
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}
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}
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