首先通过NuGet管理安装ICSharpCode.SharpZipLib.dll
以下是压缩的通用方法：
using System;
using System.IO;
using System.Web;
using System.Linq;
using System.Collections.Generic;
using ICSharpCode.SharpZipLib.Zip; namespace Common
{
/// <summary>
/// 压缩文件帮助类
/// </summary>
public static class ZipHelper
{
/// <summary>
/// 压缩多个文件
/// </summary>
/// <param name="filesToZip">要压缩的文件的相对路径集合</param>
/// <param name="zipedFileName">压缩后的文件名</param>
/// <param name="zipPassword">压缩密码</param>
/// <param name="blockSize">每次写入的缓冲区大小</param>
/// <param name="zipLevel">压缩等级（0-9）</param>
/// <returns></returns>
public static string ZipFile(List<string> filesToZip, string zipedFileName, string zipPassword = "", int blockSize = , int zipLevel = )
{
try
{
//压缩后的压缩文件相对路径
var newFileName = @"~/UploadFiles/Temp/" + zipedFileName + DateTime.Now.ToString("yyyyMMddHHmmssffff") + ".zip"; //压缩后的压缩文件物理地址
var zipedFilePath = HttpContext.Current.Server.MapPath(newFileName); //获取所有文件的物理地址
List<string> allFilesPath = new List<string>();
if (filesToZip != null && filesToZip.Any())
{
filesToZip.ForEach(file =>
{
var serverPath = HttpContext.Current.Server.MapPath(file);
if (File.Exists(serverPath))
{
allFilesPath.Add(serverPath);
}
});
} if (allFilesPath.Any())
{
//创建临时目录
var directory = HttpContext.Current.Server.MapPath(@"~/UploadFiles/Temp");
if (!Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
} //创建压缩文件
ZipOutputStream zipStream = new ZipOutputStream(File.Create(zipedFilePath));
zipStream.SetLevel(zipLevel);
zipStream.Password = zipPassword; //写入所有文件到压缩文件
for (int i = ; i < allFilesPath.Count; i++)
{
string strFilePath = allFilesPath[i];
FileStream fs = null;
try
{
//被压缩的文件名
string strFileName = strFilePath.Substring(strFilePath.LastIndexOf("\\") + ); ZipEntry entry = new ZipEntry(strFileName);
entry.DateTime = DateTime.Now;
zipStream.PutNextEntry(entry); //读取文件
fs = File.OpenRead(strFilePath); //缓冲区大小
byte[] buffer = new byte[blockSize];
int sizeRead = ;
do
{
sizeRead = fs.Read(buffer, , buffer.Length);
zipStream.Write(buffer, , sizeRead);
}
while (sizeRead > );
}
catch (Exception ex)
{
//continue;
}
finally
{
if (fs != null)
{
fs.Close();
fs.Dispose();
}
}
} zipStream.Finish();
zipStream.Close();
//返回压缩后的压缩文件相对路径
return newFileName;
} return string.Empty;
}
catch (Exception ex)
{
return string.Empty;
}
}
}
}
调用：
//要压缩的附件相对路径集合
List<string> filesToZip = new List<string>();
var ziped_file = ZipHelper.ZipFile(filesToZip, "压缩后的文件名");