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c#文件比较Code
我想我们很多时候想比较一个文件里面是否有改动,比如一个dll库是新加了一个方法或修改了其中的方法实现,不能通过可视化的工具来比较的时候,可以用这个小工具来比较, 以下是比较文件的代码。
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;namespace FilesCompare{ class Program { static void Main(string[] args) { Console.WriteLine("Please type the first file."); string firstFilePath = Console.ReadLine(); Console.WriteLine("Please type the second file."); string secondFilePath = Console.ReadLine(); bool isEqual = CompareFiles(firstFilePath, secondFilePath); Console.WriteLine(isEqual ? "equal" : " Not equal"); Console.Read(); } public static bool CompareFiles(string targetFile, string updatedFile) { FileInfo targetFileInfo = new FileInfo(targetFile); FileInfo updatedFileInfo = new FileInfo(updatedFile); if (targetFileInfo.Length != updatedFileInfo.Length) { return false; } using (FileStream targetStream = File.OpenRead(targetFile)) { using (FileStream updatedStream = File.OpenRead(updatedFile)) { if (targetStream.Length != updatedStream.Length) { return false; } // Using a larger buffer than the default buffer of 4 * 1024 used by FileStream.ReadByte improves performance. // The buffer size is based on user feedback. Based on performance results, a better buffer size may be determined. byte[] targetBuffer = new byte[16 * 1024]; byte[] updatedBuffer = new byte[16 * 1024]; int targetReadLength; int updatedReadLength; do { targetReadLength = targetStream.Read(targetBuffer, 0, targetBuffer.Length); updatedReadLength = updatedStream.Read(updatedBuffer, 0, updatedBuffer.Length); if (targetReadLength != updatedReadLength) { return false; } for (int i = 0; i < targetReadLength; ++i) { if (targetBuffer[i] != updatedBuffer[i]) { return false; } } } while (0 < targetReadLength); } } return true; } }}
c#文件比较Code
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