C#用GZipStraem做一个分卷压缩程序

Question

C#用GZipStraem做一个分卷压缩程序，但是我的程序运行后，压缩的分卷文件解压的时候报数据损坏或者是不存在该压缩文件。大虾们，帮忙看看，或者有米有好的建议，谢谢！
 FileStream fst = null, ToPut = null;
            fst = new FileStream(srcFilename, FileMode.Open, FileAccess.Read);
            ToPut = new FileStream(zipFileName, FileMode.Create, FileAccess.Write);
            GZipStream zipStream = null;
            bool result;
            if (!File.Exists(srcFilename))
                result = false;
            
            int FileLength = Convert.ToInt32(fst.Length);
            //根据一次传输的大小
            int FileSize;
            if (SectSize < FileLength)
            {
                byte[] Secbuffer = new byte[SectSize];
                int copied = 0;
                while (copied <= ((int)FileLength - SectSize))
                {
                    FileSize = fst.Read(Secbuffer, 0, SectSize);//从0开始读，每次最大读SectSize
                    fst.Flush();
                    ToPut.Write(Secbuffer, 0, SectSize);
                    ToPut.Flush();
                    ToPut.Position = fst.Position;//当前流的位置
                    copied += FileSize;
                 
                    int i = copied / SectSize;
                    zipFileName = @"F:\1\" + i.ToString() + ".rar";
                    if (!File.Exists(zipFileName))
                    {
                        ToPut = File.Create(zipFileName);
                        ToPut.Write(Secbuffer, 0, SectSize);
                        ToPut.Flush();
                        ToPut.Position = fst.Position;
                        //ToPut = File.Create(zipFileName);
                        //zipStream = new GZipStream(ToPut, CompressionMode.Compress);
                        //zipStream.Write(Secbuffer, 0, Secbuffer.Length);
                    }
                }
                int left = (int)FileLength - copied;
                FileSize = fst.Read(Secbuffer, 0, left);
                fst.Flush();
                ToPut.Write(Secbuffer, 0, left);
                ToPut.Flush();

Answer 1

路过 学习了
使用SharpZip压缩与解压缩的实战经验
 
首先，在 http://www.icsharpcode.net/OpenSource/SharpZipLib/Default.aspx 下载源码，找到“ZipConstants.cs”修改public static string ConvertToString(byte[] data)
{
      return Encoding.GetEncoding("gb2312").GetString(data, 0, data.Length);
      //return Encoding.ASCII.GetString(data,0, data.Length);
}
  
public static byte[] ConvertToArray(string str)
{
       return Encoding.GetEncoding("gb2312").GetBytes(str);
       //return Encoding.ASCII.GetBytes(str);
}
如此就可支持中文名称了
以下是我写的压缩与解压缩的代码：using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using ICSharpCode.SharpZipLib.Zip;namespace OA
{
         /// <summary>
         /// WebForm1 的摘要说明。
         /// </summary>
         public class WebForm1 : System.Web.UI.Page
         {
              public string ServerDir;
              private void Page_Load(object sender, System.EventArgs e)
               {
                // 在此处放置用户代码以初始化页面
                     this.ServerDir = Page.MapPath(".");
                     this.ZipFile("01.txt*02.txt*000.zip");  //只是示例，具体的大家自己去实现
                     this.ZipFile("01.txt*02.txt*001.zip");
                     this.UnZipFile("000.zip*001.zip");
         }
         public string ShortDir(string s)
         {
              //将文件的绝对路径转为相对路径
               string d=s.Replace(ServerDir,"");
               return d;
         }         //压缩文件 p 为客户端传回来的文件列表：文件名+压缩包的名称
          public void ZipFile(string p)
           {
                   string[] tmp = p.Split(new char[]{'*'});  //分离文件列表
                   if(tmp[tmp.Length-1]!="")  //压缩包名称不为空
                     {
                           ZipOutputStream u = new ZipOutputStream(File.Create(ServerDir+tmp[tmp.Length-1]));            //新建压缩文件流 “ZipOutputStream”
                          for(int i =0;i<tmp.Length-1;i++)
                           {
                                 if(tmp[i]!="")  //分离出来的文件名不为空
                                  {
                                          this.AddZipEntry(tmp[i],u,out u); //向压缩文件流加入内容
                                  } 
                            }
                            u.Finish(); // 结束压缩
                            u.Close();
                      }
             }             //添加压缩项目：p 为需压缩的文件或文件夹； u 为现有的源ZipOutputStream；  out j为已添加“ZipEntry”的“ZipOutputStream”
              public void AddZipEntry(string p,ZipOutputStream u,out ZipOutputStream j)
              {
                   string s =ServerDir+p;                   if(Directory.Exists(s)) //文件夹的处理
                    {
                          DirectoryInfo di = new DirectoryInfo(s);                         //***********以下内容是修订后添加的***********                         if(di.GetDirectories().Length<=0)   //没有子目录
                           {
                                     ZipEntry z = new ZipEntry(p+""""); //末尾“""”用于文件夹的标记
                                      u.PutNextEntry(z);
                            }                             //***************以上内容是修订后添加的***************
                           foreach(DirectoryInfo tem in di.GetDirectories()) //获取子目录
                             {
                                     ZipEntry z = new ZipEntry(this.ShortDir(tem.FullName)+""""); //末尾“""”用于文件夹的标记
                                      u.PutNextEntry(z);    //此句不可少，否则空目录不会被添加
                                      s = this.ShortDir(tem.FullName);
                                     this.AddZipEntry(s,u,out u);       //递归
                            }
                            foreach(FileInfo temp in di.GetFiles())  //获取此目录的文件
                            {
                                      s = this.ShortDir(temp.FullName);
                                     this.AddZipEntry(s,u,out u);       //递归
                            }
                      }
                     else if(File.Exists(s)) //文件的处理
                      {
                                u.SetLevel(9);      //压缩等级
                                 FileStream f = File.OpenRead(s);
                                byte[] b = new byte[f.Length];
                                 f.Read(b,0,b.Length);           //将文件流加入缓冲字节中
                                ZipEntry z = new ZipEntry(this.ShortDir(s));
                                u.PutNextEntry(z);              //为压缩文件流提供一个容器
                                u.Write(b,0,b.Length); //写入字节
                                f.Close();
                       }
                       j=u;    //返回已添加数据的“ZipOutputStream”
               }
               public void UnZipFile(string p)   //解压缩
               {
                   string[] un_tmp = p.Split(new char[]{'*'});
                   int i2=0;  //防止名称冲突的参数
                   for(int j=0;j<un_tmp.Length;j++)
                    {
                         if(un_tmp[j]!="")
                          {
                                 string un_time=System.DateTime.Now.ToShortDateString()+"-"+System.DateTime.Now.Hour.ToString()+"-"+System.DateTime.Now.Minute.ToString()+"-"+(System.DateTime.Now.Second+i2).ToString();
                                 string un_dir =ServerDir+"Unzip-"+un_time;
                                  Directory.CreateDirectory(un_dir);     //创建以解压时间为名称的文件夹
                                  ZipInputStream f = new ZipInputStream(File.OpenRead(ServerDir+un_tmp[j])); //读取压缩文件，并用此文件流新建 “ZipInputStream”对象                                  A:   ZipEntry zp = f.GetNextEntry();    //获取解压文件流中的项目。 另注（我的理解）：在压缩包里每个文件都以“ZipEntry”形式存在，其中包括存放文件的目录信息。如果空目录被压缩，该目录下将出现一个名称为空、大小为 0 、“Crc”属性为 00000000 的“文件”。此文件只是个标记，不会被解压。                                 while(zp!=null)
                                  {
                                       string un_tmp2;
                                         if(zp.Name.IndexOf("""")>=0) //获取文件的目录信息
                                         {
                                                 int tmp1 = zp.Name.LastIndexOf("""");
                                                  un_tmp2 = zp.Name.Substring(0,tmp1);
                                                  Directory.CreateDirectory(un_dir+""""+un_tmp2+""""); //必须先创建目录，否则解压失败 --- （A） 关系到下面的步骤（B）
                                         }
                                         if(!zp.IsDirectory&&zp.Crc!=00000000L) //此“ZipEntry”不是“标记文件”
                                           {
                                                  int i =2048;
                                                 byte[] b = new byte[i];  //每次缓冲 2048 字节
                                                  FileStream s= File.Create(un_dir+""""+zp.Name); //（B)-新建文件流
                                                 while(true) //持续读取字节，直到一个“ZipEntry”字节读完
                                                  {
                                                         i = f.Read(b,0,b.Length); //读取“ZipEntry”中的字节
                                                         if(i>0)
                                                          {
                                                                    s.Write(b,0,i); //将字节写入新建的文件流
                                                          }
                                                         else
                                                          {
                                                                   break; //读取的字节为 0 ，跳出循环
                                                          }
                                                  }
                                                  s.Close();
                                            }
                                            goto A; //进入下一个“ZipEntry”
                                      }
                                      f.Close();
                                      i2++;
                          }
                     }
               }
         }
}
 

Answer 2

hefeng_aspnet 你好你的这个是将多个文件压缩，我想问问将一个文件按照需求分卷压缩怎么办呢？