ZipClass.cs 这个是一个压缩文件的类，可直接复制使用，使用到的命名空间是
using System.IO;
using ICSharpCode.SharpZipLib;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip;
请自行网上查找此压缩程序集下载使用
public class ZipClass
{
#region ZipFileDictory
/// <summary>
/// 递归压缩文件夹方法
/// </summary>
/// <param name="FolderToZip"></param>
/// <param name="s"></param>
/// <param name="ParentFolderName"></param>
private bool ZipFileDictory(string FolderToZip, ZipOutputStream s, string ParentFolderName)
{
bool res = true;
string[] folders, filenames;
ZipEntry entry = null;
FileStream fs = null;
Crc32 crc = new Crc32();
try
{
//创建当前文件夹
entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/")); //加上 “/” 才会当成是文件夹创建
s.PutNextEntry(entry);
s.Flush();
//先压缩文件，再递归压缩文件夹
filenames = Directory.GetFiles(FolderToZip);
foreach (string file in filenames)
{
//打开压缩文件
fs = File.OpenRead(file);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/" + Path.GetFileName(file)));
entry.DateTime = DateTime.Now;
entry.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
}
}
catch
{
res = false;
}
finally
{
if (fs != null)
{
fs.Close();
fs = null;
}
if (entry != null)
entry = null;
GC.Collect();
GC.Collect(1);
}
folders = Directory.GetDirectories(FolderToZip);
foreach (string folder in folders)
{
if (!ZipFileDictory(folder, s, Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip))))
return false;
}
return res;
}
#endregion
#region ZipFileDictory
/// <summary>
/// 压缩目录
/// </summary>
/// <param name="FolderToZip">待压缩的文件夹，全路径格式</param>
/// <param name="ZipedFile">压缩后的文件名，全路径格式</param>
/// <returns></returns>
private string ZipFileDictory(string FolderToZip, string ZipedFile, string Password)
{
bool res;
if (!Directory.Exists(FolderToZip))
return "错误";
ZipOutputStream s = new ZipOutputStream(File.Create(@""+FolderToZip+".zip"));
s.SetLevel(6);
if (!string.IsNullOrEmpty(Password.Trim()))
s.Password = Password.Trim();
res = ZipFileDictory(FolderToZip, s, "");
s.Finish();
s.Close();
if (res)
{
return ZipedFile;
}
else
{
return null;
}
}
#endregion
#region ZipFile
/// <summary>
/// 压缩文件
/// </summary>
/// <param name="FileToZip">要进行压缩的文件名</param>
/// <param name="ZipedFile">压缩后生成的压缩文件名</param>
/// <returns></returns>
private string ZipFile(string FileToZip, string ZipedFile, string Password)
{
//如果文件没有找到，则报错
if (!File.Exists(FileToZip))
throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");
//FileStream fs = null;
FileStream ZipFile = null;
ZipOutputStream ZipStream = null;
ZipEntry ZipEntry = null;
string res;
try
{
ZipFile = File.OpenRead(FileToZip);
byte[] buffer = new byte[ZipFile.Length];
ZipFile.Read(buffer, 0, buffer.Length);
ZipFile.Close();
ZipFile = File.Create(ZipedFile);
ZipStream = new ZipOutputStream(ZipFile);
if (!string.IsNullOrEmpty(Password.Trim()))
ZipStream.Password = Password.Trim();
ZipEntry = new ZipEntry(Path.GetFileName(FileToZip));
ZipStream.PutNextEntry(ZipEntry);
ZipStream.SetLevel(6);
ZipStream.Write(buffer, 0, buffer.Length);
}
catch
{
res = "错误";
}
finally
{
if (ZipEntry != null)
{
ZipEntry = null;
}
if (ZipStream != null)
{
ZipStream.Finish();
ZipStream.Close();
}
if (ZipFile != null)
{
ZipFile.Close();
ZipFile = null;
}
GC.Collect();
GC.Collect(1);
}
return "成功";
}
#endregion
#region Zip
/// <summary>
/// 压缩文件 和 文件夹
/// </summary>
/// <param name="FileToZip">待压缩的文件或文件夹，全路径格式</param>
/// <param name="ZipedFile">压缩后生，全路成的压缩文件名径格式</param>
/// <param name="Password">压缩密码</param>
/// <returns></returns>
public string Zip(string FileToZip, string ZipedFile, string Password)
{
if (Directory.Exists(FileToZip))
{
return ZipFileDictory(FileToZip, ZipedFile, Password);
}
else if (File.Exists(FileToZip))
{
return ZipFile(FileToZip, ZipedFile, Password);
}
else
{
return "失败";
}
}
/// <summary>
/// 压缩文件 和 文件夹
/// </summary>
/// <param name="FileToZip">待压缩的文件或文件夹，全路径格式</param>
/// <param name="ZipedFile">压缩后生成的压缩文件名，全路径格式</param>
/// <returns></returns>
public string Zip(string FileToZip, string ZipedFile)
{
return Zip(FileToZip, ZipedFile, "");
}
#endregion
}
类使用方法：
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
Firstload();
ResponseFile();
}
}
/// <summary>
/// 输出文件流
/// </summary>
protected void ResponseFile()
{
Response.ContentType = "application/x-zip-compressed";
Response.AddHeader("Content-Disposition", "attachment;filename=CurriculumDocument.zip");
string filename = Webpath+".zip";
Response.TransmitFile(filename);
//输出文件流之后删除服务器中文件夹
if (Directory.Exists(Webpath))
{
Directory.Delete(Webpath, true); //true为递归删除子文件内容
}
}
public string FileName = "";
public string Webpath = "";
/// <summary>
/// 页面第一次加载时开始获取文件压缩
/// </summary>
/// <returns></returns>
private string Firstload()
{
//当前目录下新建文件夹
Webpath = Server.MapPath("./CurriculumFiles/下载文件/" + DateTime.Now.Year + DateTime.Now.Month + DateTime.Now.Day + DateTime.Now.Hour + DateTime.Now.Second + DateTime.Now.Millisecond);
//文件名称
FileName = DateTime.Now.Year.ToString() + DateTime.Now.Month + DateTime.Now.Day + DateTime.Now.Hour + DateTime.Now.Second + DateTime.Now.Millisecond;
//判断文件夹是否存在
if (Directory.Exists(Webpath))
{
//true为递归删除子文件内容
Directory.Delete(Webpath, true);
Directory.CreateDirectory(Webpath);
}
else if (!Directory.Exists(Webpath))
{
Directory.CreateDirectory(Webpath);
}
//将要下载的文件copy到新的文件夹中
List<string> DocumentNames_List = GetDocumentNames(ClassID);
for (int i = 0; i < DocumentNames_List.Count;i++)
{
//获取服务器中CurriculumFiles目录下的文件及其路径
string DocumentFileName=Server.MapPath("./CurriculumFiles/" + DocumentNames_List[i] + "");
//判断文件是否存在
if (File.Exists(DocumentFileName))
{
File.Copy(DocumentFileName, Webpath + "\\" + "" + DocumentNames_List[i] + "", true);
}
}
//压缩文件
ZipClass zipClass = new ZipClass();
return zipClass.Zip(Webpath, FileName);
}
时间： 2024-10-13 09:29:21