需要引用的空间
using ICSharpCode.SharpZipLib.Zip;
using System.Collections;
using System.IO;
using System.Net;
//ICSharpCode.SharpZipLib.Zip下载网址:http://www.icsharpcode.net/OpenSource/SharpZipLib/
/// <summary>
/// 压缩多个文件 并下载
/// <param name="strpath">待压缩的文件路径(物理路径如d://123.txt)</param>
/// <param name="string strFileName">最终的压缩包文件名</param>
/// </summary>
public void DownMultiFileOfZip(List<string> strPath, string strFileName)
{
MemoryStream ms = new MemoryStream();//创建可存储的内存流，用来放置压缩流；
ZipOutputStream zos = new ZipOutputStream(ms);//压缩流
long ChunkSize = 524288;//512K 每次读取文件，只读取512Ｋ，这样可以缓解服务器的压力
//向压缩流中添加文件
for (int i = 0; i < strPath.Count; i++)
{
System.IO.FileInfo fileInfo = new System.IO.FileInfo(strPath[i].ToString());
if (fileInfo.Exists == true)
{
byte[] buffer = new byte[ChunkSize];
System.Web.HttpContext.Current.Response.Clear();
string strEntryName = System.IO.Path.GetFileName(strPath[i].ToString()); //根据路径取文件名
ZipEntry entry = new ZipEntry(strEntryName);
zos.PutNextEntry(entry);
FileStream fs = File.OpenRead(strPath[i].ToString());
long dataLengthToRead = fs.Length;//获取下载的文件总大小
while (dataLengthToRead > 0 && System.Web.HttpContext.Current.Response.IsClientConnected)
{
int lengthRead = fs.Read(buffer, 0, Convert.ToInt32(ChunkSize));//读取的大小
zos.Write(buffer, 0, lengthRead);
dataLengthToRead = dataLengthToRead - lengthRead;
}
fs.Close();
}
}
//关闭压缩流
zos.Finish();
zos.Close();
//打开下载压缩流的保存框
System.Web.HttpContext.Current.Response.ContentType = "application/octet-stream";
strFileName = HttpUtility.UrlEncode(strFileName).Replace('+', ' ');
System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + strFileName + ".zip");
System.Web.HttpContext.Current.Response.Clear();
System.Web.HttpContext.Current.Response.BinaryWrite(ms.ToArray());
System.Web.HttpContext.Current.Response.End();
}
/// <summary>
/// 压缩多个文件
/// </summary>
public void WriteZip()
{
List<string> strPath = new List<string>();//多个文件路径
strPath.Add("d:\\1.txt");
strPath.Add("d:\\2.txt");
FileInfo zipFile = new FileInfo("d:\\mldn.zip"); //定义压缩文件名称
ZipOutputStream zipOut = null; // 定义压缩输出流
zipOut = new ZipOutputStream(zipFile.Create()); // 实例化压缩输出流对象，并指定压缩文件的输出路径
for (int i = 0; i < strPath.Count; i++)
{
FileInfo file = new FileInfo(strPath[i]); //定义要压缩的文件
if (file.Exists == false)
{
Response.Write("要压缩的文件(" + strPath[i] + ")不存在<br/>");
continue;
}
zipOut.PutNextEntry(new ZipEntry(file.Name)); // 创建ZipEntry 每一个被压缩的文件都用ZipEntry表示，需要为每一个压缩后的文件设置名称
zipOut.SetComment("这里是注释"); // 设置注释
FileStream fs = file.OpenRead();//定义输出流
long dataLengthToRead = fs.Length; ////获取输出流总大小
while (dataLengthToRead > 0)
{ // 读取内容
byte[] buffer = new byte[524288];
int lengthRead = fs.Read(buffer, 0, buffer.Length);//读取的大小
zipOut.Write(buffer, 0, lengthRead); // 压缩输出内容
dataLengthToRead = dataLengthToRead - lengthRead;
}
fs.Close(); // 关闭输入流
}
zipOut.Finish(); //完成压缩流
zipOut.Close(); // 关闭压缩输出流
}
/// <summary>
/// 解压缩
/// </summary>
public void ReadZip()
{
string zipFilePath = "d:\\mldn.zip";//压缩文件位置
string unZipPath = "d:\\";//放置解压缩文件的目录位置
if (!unZipPath.EndsWith("\\"))
unZipPath += "\\";
using (ZipInputStream inzip = new ZipInputStream(File.OpenRead(zipFilePath)))
{
ZipEntry theEntry=null ;
while ((theEntry = inzip.GetNextEntry()) != null)
{
string theEntryDirectoryName = Path.GetDirectoryName(theEntry.Name);//获取目录名称
string theEntryFileName = Path.GetFileName(theEntry.Name);//获取文件名称
if (theEntryDirectoryName.Length > 0)
{
Directory.CreateDirectory(unZipPath + theEntryDirectoryName);//创建放置解压缩文件的子目录
}
if (!theEntryDirectoryName.EndsWith("\\"))
theEntryDirectoryName += "\\";
if (theEntryFileName != String.Empty)
{
using (FileStream ts = File.Create(unZipPath + theEntry.Name))
{
int inSize = 524288;
byte[] date = new byte[524288];
while (true)
{
inSize = inzip.Read(date, 0, date.Length);
if (inSize > 0)
{
ts.Write(date, 0, inSize);
}
else
{
break;
}
}
}
}
}
}
}