如何比较两个文件并在另一个文件中写入增量数据

本文介绍了如何比较两个文件并在另一个文件中写入增量数据的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在尝试这样做，将File1与File2进行比较，并将增量数据写入另一个文件。但重点是在这里我想在比较时排除标题行。我试图用C＃ 下面是我试过的代码，我在SSIS脚本任务中使用这段代码。 立即注意将被批评.. !! 预付款谢谢 Pradeep Kumar T 我尝试了什么：

I am trying to do something Like this, Comparing File1 with File2 and write Incremental data into another file. But the point is here I want to exclude Header row while Comparing. I trying to do this in C# Below is the code I have tried, I am using this code in SSIS Script task. Immediate attention will be aprreciated..!! Thanks in Advance Pradeep Kumar T What I have tried:

foreach (string CFile in Directory.EnumerateFiles(CurrentWkFile)) { WriteLogFile("Step 2 : Checking " + CFile + " from path " + CurrentWkFile); //var pFile = Directory.GetFiles(PreviousWkFile, CFile, SearchOption.AllDirectories).FirstOrDefault(); String[] Prevwk = File.ReadAllLines(Path.Combine(PreviousWkFile, Path.GetFileName(CFile))); Prevwk.Skip(0); String[] CurWk = File.ReadAllLines(Path.Combine(CurrentWkFile, Path.GetFileName(CFile))); CurWk.Skip(0); if (File.Exists(PreviousWkFile + "\\" + Path.GetFileName(CFile))) { WriteLogFile("Step 3 : Comparing file" + Path.GetFileName(CFile) + "with previous week file"); IEnumerable<string> Exprevwk = Prevwk.Skip(0); IEnumerable<string> ExCurrwk = CurWk.Skip(0); IEnumerable<string> CurrWkOnly = (ExCurrwk.Skip(0).Except(Exprevwk.Skip(0))).Skip(0); WriteLogFile("Step 4 : File Compared ready to write incremental record in the file " + CFile); File.WriteAllLines(Path.Combine(ToProcessFile, Path.GetFileName(CFile)), CurrWkOnly.Skip(0)); WriteLogFile("step 5 :Incremental data written in the file " + CFile + "placed in the folder path" + ToProcessFile); } else { IEnumerable<string> CurrWeek = CurWk; WriteLogFile("Crazy step :In Prevoius week " + Path.GetFileName(CFile) + "not exists in the path" + PreviousWkFile); File.WriteAllLines(Path.Combine(ToProcessFile, Path.GetFileName(CFile)), CurrWeek); } }

推荐答案

看起来很直接，我想知道是什么问题是......你的目标是框架3.5确定，但SSIS与手头的事情有什么关系？ 无论如何这里是我的五美分一个简单的程序在3.5 Seems pretty straight forward, i wonder what the problem is ... you're targeting framework 3.5 ok, but SSIS what does that have to do with the matter at hand? Anyway here's my five cents on a simple program that does that in 3.5 using System; using System.Collections.Generic; using System.Data; using System.IO; using System.Linq; using System.Reflection; using System.Text; namespace ComparingOfFiles { class Program { static void Main(string[] args) { Write("Welcome to file compare program utility, it will generate a file and add some lines, then it will copy it and add more. Finally compare the two and write the added content to a new file.\r\n"); try { var parts = Assembly.GetExecutingAssembly().Location.Split(@"\".ToCharArray()); parts[parts.GetUpperBound(0)] = ""; var basePath = string.Join(@"\", parts); string fileOne = Path.Combine(basePath, "fileone.txt"); string fileTwo = Path.Combine(basePath, "filetwo.txt"); string fileResult = Path.Combine(basePath, "fileresult.txt"); int columns = 8; string valuerange = "abcdefghijklmnopqrstuvwxyz"; string seperator = System.Globalization.CultureInfo.CurrentCulture.TextInfo.ListSeparator; var rnd = new Random((int) DateTime.Now.Ticks); Write("Deling files if existing"); foreach(var file in new []{fileOne, fileTwo, fileResult}) if(File.Exists(file)) File.Delete(file); Write("Making log file one"); using (var fs = new FileStream(fileOne, FileMode.Create)) { var writer = new StreamWriter(fs, Encoding.UTF8); for (int x = 0; x < 10; x++) AddColumnsOfRandomWords(columns, rnd, valuerange, seperator, writer); writer.Flush(); writer.Close(); } Write("Copying to logfile two and adding some lines"); File.Copy(fileOne, fileTwo); using (var fs = new FileStream(fileTwo, FileMode.Append)) { var writer = new StreamWriter(fs, Encoding.UTF8); for (int x = 0; x < 5; x++) AddColumnsOfRandomWords(columns, rnd, valuerange, seperator, writer); writer.Flush(); writer.Close(); } Write("Comparing the two files"); var sbDifference = new StringBuilder(); var fileOneContentRows = new List<string>(); var fileTwoContentRows = new List<string>(); using (var fs = new FileStream(fileOne, FileMode.Open, FileAccess.Read)) { var reader = new StreamReader(fs, Encoding.UTF8); while(!reader.EndOfStream) fileOneContentRows.Add(reader.ReadLine()); reader.Close(); } using (var fs = new FileStream(fileTwo, FileMode.Open, FileAccess.Read)) { var reader = new StreamReader(fs, Encoding.UTF8); while (!reader.EndOfStream) fileTwoContentRows.Add(reader.ReadLine()); reader.Close(); } using (var fs = new FileStream(fileResult, FileMode.CreateNew)) { int idx = 1; while (idx < fileOneContentRows.Count()) { if (fileOneContentRows[idx].Equals(fileTwoContentRows[idx])) { idx++; continue; } throw new DataException("OMFG! the logs from last weeks have been changed this week!"); } if (fileOneContentRows.Count() >= fileTwoContentRows.Count()) { sbDifference.AppendLine("Log error, the content of the logfile appears to have decreased between one: " + fileOne + " and two: " + fileTwo); } else { for (int z = idx; z < fileTwoContentRows.Count();z++ ) { sbDifference.AppendLine(fileTwoContentRows[z]); } } var writer = new StreamWriter(fs, Encoding.UTF8); writer.Write(sbDifference.ToString()); writer.Flush(); writer.Close(); } Write("Done"); } catch (Exception ex) { Write("Exception occured:\r\n" + ex.ToString()); } Write("\r\nPress ENTER to exit"); Console.ReadLine(); } private static void AddColumnsOfRandomWords(int columnsToAdd, Random rnd, string valuerange, string seperator, StreamWriter writer) { for (int i = 0; i < columnsToAdd; i++) { int length = rnd.Next(1, 20); var word = ""; for (int y = 0; y < length; y++) word += valuerange.Substring(rnd.Next(valuerange.Length - 1), 1); if (i < (columnsToAdd - 1)) word += seperator; writer.Write(word); } writer.Write("\r\n"); } private static void Write(string message) { Console.WriteLine(message); } } }