Asp.net 2.0 C#实现压缩/解压功能

(一). 实现功能

    对文件及目录的压缩及解压功能

(二). 运行图片示例

  (三).代码

   1. 压缩类

  1 /**/ /// <summary>
  2/// 压缩类
  3/// </summary>
  4 public   class  ZipClass
  5 {   
  6    public static void ZipFile(string FileToZip, string ZipedFile, int CompressionLevel, int BlockSize)
  7    {
  8        //如果文件没有找到，则报错
  9        if (!System.IO.File.Exists(FileToZip))
 10        {
 11            throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");
 12        }
 13
 14        System.IO.FileStream StreamToZip = new System.IO.FileStream(FileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read);
 15        System.IO.FileStream ZipFile = System.IO.File.Create(ZipedFile);
 16        ZipOutputStream ZipStream = new ZipOutputStream(ZipFile);
 17        ZipEntry ZipEntry = new ZipEntry("ZippedFile");
 18        ZipStream.PutNextEntry(ZipEntry);
 19        ZipStream.SetLevel(CompressionLevel);
 20        byte[] buffer = new byte[BlockSize];
 21        System.Int32 size = StreamToZip.Read(buffer, 0, buffer.Length);
 22        ZipStream.Write(buffer, 0, size);
 23        try
 24        {
 25            while (size < StreamToZip.Length)
 26            {
 27                int sizeRead = StreamToZip.Read(buffer, 0, buffer.Length);
 28                ZipStream.Write(buffer, 0, sizeRead);
 29                size += sizeRead;
 30            }
 31        }
 32        catch (System.Exception ex)
 33        {
 34            throw ex;
 35        }
 36        ZipStream.Finish();
 37        ZipStream.Close();
 38        StreamToZip.Close();
 39    }
 40
 41    /**//// <summary>
 42    /// 压缩目录
 43    /// </summary>
 44    /// <param name="args">数组(数组[0]: 要压缩的目录; 数组[1]: 压缩的文件名)</param>
 45    public static void ZipFileDictory(string[] args)
 46    {
 47        string[] filenames = Directory.GetFiles(args[0]);
 48
 49        Crc32 crc = new Crc32();
 50        ZipOutputStream s = new ZipOutputStream(File.Create(args[1]));            
 51        s.SetLevel(6); 
 52        foreach (string file in filenames)
 53        {
 54            //打开压缩文件
 55            FileStream fs = File.OpenRead(file);
 56
 57            byte[] buffer = new byte[fs.Length];
 58            fs.Read(buffer, 0, buffer.Length);
 59            ZipEntry entry = new ZipEntry(file);
 60
 61            entry.DateTime = DateTime.Now;
 62            
 63            entry.Size = fs.Length;
 64            fs.Close();
 65
 66            crc.Reset();
 67            crc.Update(buffer);
 68
 69            entry.Crc = crc.Value;
 70
 71            s.PutNextEntry(entry);
 72
 73            s.Write(buffer, 0, buffer.Length);
 74
 75        }
 76
 77        s.Finish();
 78        s.Close();
 79    }
 80
 81    /**//// <summary>
 82    /// 压缩文件
 83    /// </summary>
 84    /// <param name="FileToZip">要进行压缩的文件名</param>
 85    /// <param name="ZipedFile">压缩后生成的压缩文件名</param>
 86    public static void ZipFile(string FileToZip, string ZipedFile)
 87    {
 88        //如果文件没有找到，则报错
 89        if (!File.Exists(FileToZip))
 90        {
 91            throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");
 92        }            
 93        FileStream fs = File.OpenRead(FileToZip);
 94        byte[] buffer = new byte[fs.Length];
 95        fs.Read(buffer, 0, buffer.Length);
 96        fs.Close();
 97
 98        FileStream ZipFile = File.Create(ZipedFile);
 99        ZipOutputStream ZipStream = new ZipOutputStream(ZipFile);
100        ZipEntry ZipEntry = new ZipEntry("ZippedFile");
101        ZipStream.PutNextEntry(ZipEntry);
102        ZipStream.SetLevel(6);
103        
104        ZipStream.Write(buffer, 0, buffer.Length);            
105        ZipStream.Finish();
106        ZipStream.Close();
107    }
108}
109
110 /**/ /// <summary>
111///  解压类
112/// </summary>
113 public   class  UnZipClass
114 {
115    /**//// <summary>
116    /// 解压功能(解压压缩文件到指定目录)
117    /// </summary>
118    /// <param name="args">待解压的文件</param>
119    /// <param name="args">指定解压目标目录</param>
120    public static void UnZip(string[] args)
121    {
122        ZipInputStream s = new ZipInputStream(File.OpenRead(@args[0].Trim()));            
123        ZipEntry theEntry;
124        string directoryName = Path.GetDirectoryName(@args[1].Trim());
125        
126        if (!Directory.Exists(@args[1].Trim()))
127        {
128            Directory.CreateDirectory(directoryName);
129        }
130        while ((theEntry = s.GetNextEntry()) != null)
131        {
132            ;
133            string fileName = Path.GetFileName(theEntry.Name);
134
135            if (fileName != String.Empty)
136            {            
137                FileStream streamWriter = File.Create(@args[1].Trim() + fileName);
138
139                int size = 2048;
140                byte[] data = new byte[2048];
141                while (true)
142                {
143                    size = s.Read(data, 0, data.Length);
144                    if (size > 0)
145                    {
146                        streamWriter.Write(data, 0, size);
147                    }
148                    else
149                    {
150                        break;
151                    }
152                }
153
154                streamWriter.Close();
155            }
156        }
157        s.Close();
158    }
159

2. 前台页面代码

 1        < body >
 2      < form id = " form1 "  runat = " server " >
 3      < div >
 4          & nbsp; < asp:Label ID = " Label1 "  runat = " server "  BackColor = " #C0C0FF "  Font - Size = " XX-Large "
 5             Height = " 44px "  Text = " 压缩文件/文件夹示例 "  Width = " 366px " ></ asp:Label >
 6          < asp:Panel ID = " Panel1 "  runat = " server "  Height = " 1px "  Width = " 369px "  BackColor = " #FFFFC0 " >
 7              < table width = " 100% "  height = " 100% " >
 8                  < tr >
 9                      < td style = " width: 3px "  valign = " top " >
10                          < asp:Label ID = " lbDisplay "  runat = " server "  Text = " 压缩目录(from/to): "  Width = " 153px " ></ asp:Label >< asp:TextBox ID = " TextBox1 "  runat = " server " ></ asp:TextBox >
11              < br  />
12              < asp:TextBox ID = " TextBox2 "  runat = " server " ></ asp:TextBox >
13              & nbsp; < br  />
14              < asp:Button ID = " btZipDictory "  runat = " server "  OnClick = " btZipDictory_Click "  Text = " 压缩目录 "   />< br  />
15                      </ td >
16                      < td style = " width: 4px "  valign = " middle " >
17                          < asp:Label ID = " Label2 "  runat = " server "  Text = " 解压目录(from/to): "  Width = " 154px " ></ asp:Label >
18                          < asp:TextBox ID = " TextBox3 "  runat = " server " ></ asp:TextBox >
19                          < br  />
20                          < asp:TextBox ID = " TextBox4 "  runat = " server " ></ asp:TextBox >
21                          & nbsp; < br  />
22                          < asp:Button ID = " btUnZipDictory "  runat = " server "  Text = " 解压目录 "  OnClick = " btUnZipDictory_Click "   />< br  />
23                      </ td >               
24                  </ tr >
25                  < tr >
26                      < td style = " width: 3px; height: 150px "  valign = " top " >
27                          < asp:Label ID = " Label3 "  runat = " server "  Text = " 压缩文件(from/to): "  Width = " 153px " ></ asp:Label >
28                          < asp:TextBox ID = " TextBox5 "  runat = " server " ></ asp:TextBox >
29                          < br  />
30                          < asp:TextBox ID = " TextBox6 "  runat = " server " ></ asp:TextBox >
31                          & nbsp; < br  />
32                          < asp:Button ID = " btZipFile "  runat = " server "  Text = " 压缩文件 "  OnClick = " btZipFile_Click "   />< br  />
33                      </ td >
34                      < td style = " width: 4px; height: 150px "  valign = " top " >
35                          < asp:Label ID = " Label4 "  runat = " server "  Text = " 解压文件(from/to): "  Width = " 154px " ></ asp:Label >
36                          < asp:TextBox ID = " TextBox7 "  runat = " server " ></ asp:TextBox >
37                          < br  />
38                          < asp:TextBox ID = " TextBox8 "  runat = " server " ></ asp:TextBox >
39                          & nbsp; < br  />
40                          < asp:Button ID = " btUnZipFile "  runat = " server "  Text = " 解压文件 "  OnClick = " btUnZipFile_Click "   />< br  />
41                      </ td >
42              
43                  </ tr >
44      
45              </ table >
46              < asp:Label ID = " lbMessage "  runat = " server "  Width = " 368px " ></ asp:Label >< br  />
47              < br  />
48          </ asp:Panel >
49     
50      </ div >
51      </ form >
52 </ body >
53

3. 后台页面代码

 1public partial class  _Default : System.Web.UI.Page 
 2 {
 3    protected void Page_Load(object sender, EventArgs e)
 4    {
 5
 6    }
 7    protected void btZipDictory_Click(object sender, EventArgs e)
 8    {
 9        string[] FilePathS = new string[2];
10        FilePathS[0] = TextBox1.Text.Trim();  //待压缩的文件目录
11        FilePathS[1] = TextBox2.Text.Trim();  //生成的目标文件        
12        ZipClass.ZipFileDictory(FilePathS);
13    }
14    protected void btUnZipDictory_Click(object sender, EventArgs e)
15    {
16        string[] FilePathS = new string[2];
17        FilePathS[0] = TextBox3.Text.Trim();  //待解压的文件
18        FilePathS[1] = TextBox4.Text.Trim();  //解压目标存放目录
19        UnZipClass.UnZip(FilePathS);
20    }
21    protected void btZipFile_Click(object sender, EventArgs e)
22    {
23        string[] FilePathS = new string[2];
24        FilePathS[0] = TextBox5.Text.Trim();  //待压缩的文件
25        FilePathS[1] = TextBox6.Text.Trim();  //生成的压缩文件名
26        ZipClass.ZipFile(FilePathS[0], FilePathS[1]);
27
28    }
29    protected void btUnZipFile_Click(object sender, EventArgs e)
30    {
31        string[] FilePathS = new string[2];
32        FilePathS[0] = TextBox7.Text.Trim();  //待解压的文件
33        FilePathS[1] = TextBox8.Text.Trim();  //解压目标存放目录
34        UnZipClass.UnZip(FilePathS);
35    }
36}
37

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