ICSharpCode 做文档管理系统的下载功能

最新推荐文章于 2025-09-07 09:02:07 发布

转载最新推荐文章于 2025-09-07 09:02:07 发布 · 61 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/tatabi/archive/2010/08/22/tatabi.html

文章标签：

#ui

本文介绍了一种利用ICSharpCode.SharpZipLib库实现文件夹及文件压缩并下载的方法。通过C#代码示例展示了如何将指定路径下的文件和文件夹打包成ZIP格式供用户下载。

因为要做文档管理系统，需要同时下载文件夹和文件。到网上找到了ICSharpCode，帮我完美的解决了问题。

需要引用ICSharpCode.SharpZipLib.dll ，dll下载地址 http://www.icsharpcode.net/

代码如下:

代码

using System;
using System.Collections.Generic;
using System.Web.UI;
using System.Web;
using System.Web.UI.WebControls;
using System.Text;
using System.IO;
using System.Text;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip;

namespace Common
{
public class SharpZipLib
{
static ZipOutputStream zos = null ;
static String strBaseDir = "" ;
/// <summary>
/// 压缩文件和文件夹并下载文件（夹）列表　放在List〈string〉泛型里格式如　文件夹 @"E:\我的文档\新建文件夹,文件 @"D:\我的照片.jpg"
/// </summary>
/// <param name="strPath"> 文件（夹）列表　放在List〈string〉泛型里格式如　文件夹 @"E:\我的文档\新建文件夹,文件 @"D:\我的照片.jpg" </param>
/// <param name="strFileName"> 压缩包名称 </param>
public static void dlZipDir(List < string > strPath, string strFileName)
{
MemoryStream ms = null ;
HttpContext.Current.Response.ContentType = " application/octet-stream " ;
strFileName = HttpUtility.UrlEncode(strFileName).Replace( ' + ' , ' ' );
HttpContext.Current.Response.AddHeader( " Content-Disposition " , " attachment; filename= " + strFileName + " .zip " );
ms = new MemoryStream();
zos = new ZipOutputStream(ms);
// strBaseDir = strPath;
addZipEntry(strPath);
zos.Finish();
zos.Close();
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.BinaryWrite(ms.ToArray());
HttpContext.Current.Response.End();
}

/// <summary>
/// 文件（夹）列表放入压缩包
/// </summary>
/// <param name="PathStr"></param>
static void addZipEntry(List < string > PathStr)
{
foreach ( string path in PathStr)
{
strBaseDir = GetPostfixStr(path);
int che = CheckFilename(path);
if (che == 0 )
{
DirectoryInfo di = new DirectoryInfo(path);
foreach (DirectoryInfo item in di.GetDirectories())
{
addZipEntry(item.FullName);
}
foreach (FileInfo item in di.GetFiles())
{
AddZip(item.FullName);
}
}
else if (che == 1 )
{
AddZip(path);
}
}
}
/// <summary>
/// 处理单个文件夹的把文件夹添加到压缩包里
/// </summary>
/// <param name="PathStr"></param>
static void addZipEntry( string PathStr)
{
if (strBaseDir == "" )
{
strBaseDir = GetPostfixStr(PathStr);
}
DirectoryInfo di = new DirectoryInfo(PathStr);
foreach (DirectoryInfo item in di.GetDirectories())
{
addZipEntry(item.FullName);
}
foreach (FileInfo item in di.GetFiles())
{
AddZip(item.FullName);
}
}
/// <summary>
/// 把文件添加到压缩包里
/// </summary>
/// <param name="FileName"></param>
static void AddZip( string FileName)
{
FileStream fs = File.OpenRead(FileName);
byte [] buffer = new byte [fs.Length];
fs.Read(buffer, 0 , buffer.Length);
string strEntryName = FileName.Replace(strBaseDir, "" );
ZipEntry entry = new ZipEntry(strEntryName);
zos.PutNextEntry(entry);
zos.Write(buffer, 0 , buffer.Length);
fs.Close();
}
/// <summary>
/// 返回是文件还是文件夹
/// </summary>
/// <param name="filename"></param>
/// <returns> 0是文件夹1是文件2什么都不是 </returns>
static int CheckFilename( string filename)
{
if (Directory.Exists(filename))
{

return 0 ;
}
if (File.Exists(filename))
{

return 1 ;
}
return 2 ;
}
/// <summary>
/// 用于处理解压包里的文件夹
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
static string GetPostfixStr( string filename)
{
int start = filename.LastIndexOf( " \\ " );
int length = filename.Length;
if (start < length)
{
start ++ ;
}
string postfix = filename.Substring( 0 , start);
return postfix;
}

}
}

转载于:https://www.cnblogs.com/tatabi/archive/2010/08/22/tatabi.html