压缩文件、加压文件

 在此之前我们要引用一下

ICSharpCode.SharpZipLib.dll

 

下载地址 http://download.youkuaiyun.com/source/3514660

 

 

 

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
using ICSharpCode.SharpZipLib.Zip;
using System.IO;

public class ZipClass
{

    public ZipClass()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }
    #region 加压解压方法
    /// <summary>
    /// 对单一文件进行压缩
    /// </summary>
    /// <param name="FilePath">文件路径</param>
    /// <param name="zipFilePath">保存路径 如果是空则默认与要压缩的文件同一个文件夹</param>
    /// <param name="err">出错信息</param>
    /// <returns>是否压缩成功</returns>
    public bool ZipFile(string FilePath, string zipFilePath, out string err)
    {
        err = "";
        if (FilePath == string.Empty)
        {
            err = "要压缩的文件不能为空！";
            return false;
        }
        if (!File.Exists(FilePath))
        {
            err = "要压缩的文件不存在！";
            return false;
        }
        //压缩文件名为空时使用文件夹名＋.zip
        if (string.IsNullOrEmpty(zipFilePath))
        {
            zipFilePath = FilePath.Substring(0, FilePath.LastIndexOf(".")) + ".zip";
        }

        try
        {
            using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFilePath)))
            {
                s.SetLevel(9);

                ZipEntry entry = new ZipEntry(Path.GetFileName(FilePath));
                entry.DateTime = DateTime.Now;
                s.PutNextEntry(entry);
                using (FileStream fs = File.OpenRead(FilePath))
                {
                    byte[] buffer = new byte[fs.Length];
                    int sourceBytes;
                    do
                    {
                        sourceBytes = fs.Read(buffer, 0, buffer.Length);
                        s.Write(buffer, 0, sourceBytes);
                    } while (sourceBytes > 0);
                }
                s.Finish();
                s.Close();
            }
        }
        catch (Exception ex)
        {
            err = ex.Message;
            return false;
        }
        return true;
    }

    /// <summary>
    /// 功能：压缩文件（暂时只压缩文件夹下一级目录中的文件，文件夹及其子级被忽略）
    /// </summary>
    /// <param name="dirPath">被压缩的文件夹夹路径</param>
    /// <param name="zipFilePath">生成压缩文件的路径，为空则默认与被压缩文件夹同一级目录，名称为：文件夹名+.zip</param>
    /// <param name="err">出错信息</param>
    /// <returns>是否压缩成功</returns>
    public bool ZipFiles(string dirPath, string zipFilePath, out string err)
    {
        err = "";
        if (dirPath == string.Empty)
        {
            err = "要压缩的文件夹不能为空！";
            return false;
        }
        if (!Directory.Exists(dirPath))
        {
            err = "要压缩的文件夹不存在！";
            return false;
        }
        //压缩文件名为空时使用文件夹名＋.zip
        if (zipFilePath == string.Empty)
        {
            if (dirPath.EndsWith("\\"))
            {
                dirPath = dirPath.Substring(0, dirPath.Length - 1);
            }
            zipFilePath = dirPath + ".zip";
        }

        try
        {
            string[] filenames = Directory.GetFiles(dirPath);
            using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFilePath)))
            {
                s.SetLevel(9);
                byte[] buffer = new byte[4096];
                foreach (string file in filenames)
                {
                    ZipEntry entry = new ZipEntry(Path.GetFileName(file));
                    entry.DateTime = DateTime.Now;
                    s.PutNextEntry(entry);
                    using (FileStream fs = File.OpenRead(file))
                    {
                        int sourceBytes;
                        do
                        {
                            sourceBytes = fs.Read(buffer, 0, buffer.Length);
                            s.Write(buffer, 0, sourceBytes);
                        } while (sourceBytes > 0);
                    }
                }
                s.Finish();
                s.Close();
            }
        }
        catch (Exception ex)
        {
            err = ex.Message;
            return false;
        }
        return true;
    }

    /// <summary>
    /// 功能：解压zip格式的文件。
    /// </summary>
    /// <param name="zipFilePath">压缩文件路径</param>
    /// <param name="unZipDir">解压文件存放路径,为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹</param>
    /// <param name="err">出错信息</param>
    /// <returns>解压是否成功</returns>
    public bool UnZipFile(string zipFilePath, string unZipDir, out string err)
    {
        err = "";
        if (zipFilePath == string.Empty)
        {
            err = "压缩文件不能为空！";
            return false;
        }
        if (!File.Exists(zipFilePath))
        {
            err = "压缩文件不存在！";
            return false;
        }
        //解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹
        if (unZipDir == string.Empty)
            unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));
        if (!unZipDir.EndsWith("\\"))
            unZipDir += "\\";
        if (!Directory.Exists(unZipDir))
            Directory.CreateDirectory(unZipDir);

        try
        {
            using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath)))
            {

                ZipEntry theEntry;
                while ((theEntry = s.GetNextEntry()) != null)
                {
                    string directoryName = Path.GetDirectoryName(theEntry.Name);
                    string fileName = Path.GetFileName(theEntry.Name);
                    if (directoryName.Length > 0)
                    {
                        Directory.CreateDirectory(unZipDir + directoryName);
                    }
                    if (!directoryName.EndsWith("\\"))
                        directoryName += "\\";
                    if (fileName != String.Empty)
                    {
                        using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name))
                        {

                            int size = 2048;
                            byte[] data = new byte[2048];
                            while (true)
                            {
                                size = s.Read(data, 0, data.Length);
                                if (size > 0)
                                {
                                    streamWriter.Write(data, 0, size);
                                }
                                else
                                {
                                    break;
                                }
                            }
                        }
                    }
                }//while
            }
        }
        catch (Exception ex)
        {
            err = ex.Message;
            return false;
        }
        return true;
    }//解压结束
    #endregion
}

 

引用完毕、类也写完了、接下来我们该调用了

 

压缩

 

 string er = null;
 ZipClass zc = new ZipClass();
 bool be = false;
 be = zc.ZipFile(要压缩的文件, 压缩之后存放的路径, out er);

if（be）

{

//压缩成功

}

else

{

//压缩失败

}

 

解压

 

string er = null;
ZipClass zc = new ZipClass();
bool be = false;
be = zc.ZipFile(要解压的文件, 解压之后存放的路径, out er);

if（be）

{

//解压成功

}

else

{

//解压失败

}

 

如果要解压、压缩的路径在项目下

可以考虑用

string Path = Server.MapPath("../File") + "\\" + “文件名称.xml”;

string spath2 = Server.MapPath("../File") + "\\" + “压缩名称.zip”;

或者

 

string Path = HttpContext.Current.Request.PhysicalApplicationPath+“file”+ "\\" + “文件名称.xml”;

string spath2 = HttpContext.Current.Request.PhysicalApplicationPath+"file+ “压缩名称.zip”;