封装了一个类，方便使用SevenZipSharp，支持加入进度显示事件。

双重加密压缩工具范例：

using SevenZip;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace ProcessItems
{class SevenZipSharpUser{// 假设这是某个类中的一个事件定义public  event EventHandler<ProgressEventArgs> ProgressUpdated = null;public  static bool SetSetLibraryPath(){//设置库路径string currentDirectory = AppDomain.CurrentDomain.BaseDirectory;string dllPath = GetAppropriate7zDllPath(currentDirectory);if (!File.Exists(dllPath)){return false;}SevenZipSharpUser.SetSetLibraryPath(dllPath);return true;}public static void SetSetLibraryPath(string s7zDllPath){SevenZipBase.SetLibraryPath(s7zDllPath);}public bool CompressItem(string inputItem, string outputFile, string password = null){string directory = Path.GetDirectoryName(outputFile);if (!Directory.Exists(directory)){Directory.CreateDirectory(directory);}if (Directory.Exists(inputItem)){return CompressDir(inputItem, outputFile, password);}else if (File.Exists(inputItem)){return CompressFile(inputItem, outputFile, password);}return false;}public bool DoubleCompressItem(string inputItem, string outputFile, string password1 = null, string password2 = null){string directory = Path.GetDirectoryName(outputFile);string fileNameWithoutExtension = Path.GetFileNameWithoutExtension(outputFile);string sFirstDstPath = Path.Combine(directory, $"{fileNameWithoutExtension}{".7zx"}");CompressItem(inputItem, sFirstDstPath, password1);CompressItem(sFirstDstPath, outputFile, password2);File.Delete(sFirstDstPath);return false;}public bool ExtractItem(string inputItem, string outputDir, string password = null){// 确保输出目录存在string directory = Path.GetDirectoryName(outputDir);if (!Directory.Exists(directory)){Directory.CreateDirectory(directory);}// 检查输入文件是否存在if (!File.Exists(inputItem)){Console.WriteLine($"输入文件不存在: {inputItem}");return false;}try{// 使用 SevenZipExtractor 打开 .7z 文件if (string.IsNullOrEmpty(password)){using (var extractor = new SevenZipExtractor(inputItem)){// 提取所有文件到输出目录extractor.ExtractArchive(outputDir);}}else{using (var extractor = new SevenZipExtractor(inputItem, password)){// 提取所有文件到输出目录extractor.ExtractArchive(outputDir);}}// 解压成功return true;}catch (Exception ex){// 处理异常，例如密码错误或文件损坏Console.WriteLine($"解压文件时发生错误: {ex.Message}");return false;}}public string GetUniqueFilePath(string filePath){string directory = Path.GetDirectoryName(filePath);string fileNameWithoutExtension = Path.GetFileNameWithoutExtension(filePath);string extension = Path.GetExtension(filePath);int counter = 1;string newFilePath = filePath;while (File.Exists(newFilePath)){newFilePath = Path.Combine(directory, $"{fileNameWithoutExtension}{counter}{extension}");counter++;}return newFilePath;}public bool CompressFile(string inputFile, string outputFile, string password = null){try{// 检查输入文件是否存在if (!File.Exists(inputFile)){throw new FileNotFoundException("输入文件不存在。", inputFile);}// 创建 SevenZipCompressor 实例var compressor = new SevenZipCompressor();// 设置压缩级别和档案格式compressor.CompressionLevel = CompressionLevel.Normal;compressor.ArchiveFormat = OutArchiveFormat.SevenZip;// 订阅进度更新事件if (ProgressUpdated != null){compressor.Compressing += ProgressUpdated;}// 压缩文件compressor.CompressFilesEncrypted(outputFile, password, inputFile);if (ProgressUpdated != null){compressor.Compressing -= ProgressUpdated;}// 压缩成功后返回 truereturn true;}catch (Exception ex){// 在发生异常时记录日志、抛出异常或返回 false// 这里简单地返回 false，但你可以根据需要更改此行为Console.WriteLine($"压缩文件时发生错误: {ex.Message}");return false;}finally{}}public bool CompressDir(string stInputDir, string stOutputFile, string stPwd){try{// 检查输入文件是否存在if (!Directory.Exists(stInputDir)){throw new FileNotFoundException("输入目录不存在。", stInputDir);}// 创建 SevenZipCompressor 实例var compressor = new SevenZipCompressor();// 设置压缩级别和档案格式compressor.CompressionLevel = CompressionLevel.Normal;compressor.ArchiveFormat = OutArchiveFormat.SevenZip;// 订阅进度更新事件if (ProgressUpdated != null){compressor.Compressing += ProgressUpdated;}// 压缩文件compressor.CompressDirectory(stInputDir, stOutputFile, stPwd);if (ProgressUpdated != null){compressor.Compressing -= ProgressUpdated;}// 压缩成功后返回 truereturn true;}catch (Exception ex){// 在发生异常时记录日志、抛出异常或返回 false// 这里简单地返回 false，但你可以根据需要更改此行为Console.WriteLine($"压缩文件时发生错误: {ex.Message}");return false;}finally{}}private static string GetAppropriate7zDllPath(string basePath){string dllName = "7z.dll";string dllPath = Path.Combine(basePath, dllName);// Check if the system is 64-bit or 32-bitif (Environment.Is64BitOperatingSystem){// If the system is 64-bit, check for a specific 64-bit version of the DLLstring dll64Path = Path.Combine(basePath, "7z.dll"); // Example name for 64-bit versionif (File.Exists(dll64Path)){return dll64Path;}// If the specific 64-bit version is not found, fall back to the generic name}else{// If the system is 32-bit, check for a specific 32-bit version of the DLLstring dll32Path = Path.Combine(basePath, "7-zip32.dll"); // Example name for 32-bit versionif (File.Exists(dll32Path)){return dll32Path;}// If the specific 32-bit version is not found, fall back to the generic name}// If neither specific version is found, return the generic DLL name (which might be a universal version or an error)return dllPath;}}
}

使用方法：

            //设置库if (!SevenZipSharpUser.SetSetLibraryPath()){MessageBox.Show("7z.dll库引用失败!", "错误！", MessageBoxButtons.OK, MessageBoxIcon.Error);}//这里是处理任务逻辑开始========start===========if (itemInfo.bDoubleCompress){szu.DoubleCompressItem(itemInfo.sItemPath, itemInfo.sDstPath, itemInfo.sPassword1, itemInfo.sPassword2);}else{szu.CompressItem(itemInfo.sItemPath, itemInfo.sDstPath, itemInfo.sPassword1);}//这里是处理任务逻辑结束========end=============