Asp.net 2.0 C#实现压缩/解压功能 (示例代码下载)

(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

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/**//// <summary>
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/// 压缩类
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/// </summary>
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public class ZipClass
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{
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public static void ZipFile(string FileToZip, string ZipedFile, int CompressionLevel, int BlockSize)
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{
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//如果文件没有找到，则报错
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if (!System.IO.File.Exists(FileToZip))
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{
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throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");
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}
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System.IO.FileStream StreamToZip = new System.IO.FileStream(FileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read);
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System.IO.FileStream ZipFile = System.IO.File.Create(ZipedFile);
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ZipOutputStream ZipStream = new ZipOutputStream(ZipFile);
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ZipEntry ZipEntry = new ZipEntry("ZippedFile");
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ZipStream.PutNextEntry(ZipEntry);
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ZipStream.SetLevel(CompressionLevel);
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byte[] buffer = new byte[BlockSize];
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System.Int32 size = StreamToZip.Read(buffer, 0, buffer.Length);
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ZipStream.Write(buffer, 0, size);
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try
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{
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while (size < StreamToZip.Length)
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{
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int sizeRead = StreamToZip.Read(buffer, 0, buffer.Length);
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ZipStream.Write(buffer, 0, sizeRead);
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size += sizeRead;
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}
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}
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catch (System.Exception ex)
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{
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throw ex;
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}
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ZipStream.Finish();
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ZipStream.Close();
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StreamToZip.Close();
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}
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/**//// <summary>
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/// 压缩目录
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/// </summary>
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/// <param name="args">数组(数组[0]: 要压缩的目录; 数组[1]: 压缩的文件名)</param>
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public static void ZipFileDictory(string[] args)
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{
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string[] filenames = Directory.GetFiles(args[0]);
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Crc32 crc = new Crc32();
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ZipOutputStream s = new ZipOutputStream(File.Create(args[1]));
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s.SetLevel(6);
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foreach (string file in filenames)
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{
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//打开压缩文件
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FileStream fs = File.OpenRead(file);
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byte[] buffer = new byte[fs.Length];
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fs.Read(buffer, 0, buffer.Length);
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ZipEntry entry = new ZipEntry(file);
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entry.DateTime = DateTime.Now;
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entry.Size = fs.Length;
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fs.Close();
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crc.Reset();
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crc.Update(buffer);
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entry.Crc = crc.Value;
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s.PutNextEntry(entry);
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s.Write(buffer, 0, buffer.Length);
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}
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s.Finish();
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s.Close();
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}
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/**//// <summary>
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/// 压缩文件
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/// </summary>
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/// <param name="FileToZip">要进行压缩的文件名</param>
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/// <param name="ZipedFile">压缩后生成的压缩文件名</param>
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public static void ZipFile(string FileToZip, string ZipedFile)
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{
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//如果文件没有找到，则报错
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if (!File.Exists(FileToZip))
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{
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throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");
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}
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FileStream fs = File.OpenRead(FileToZip);
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byte[] buffer = new byte[fs.Length];
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fs.Read(buffer, 0, buffer.Length);
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fs.Close();
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FileStream ZipFile = File.Create(ZipedFile);
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ZipOutputStream ZipStream = new ZipOutputStream(ZipFile);
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ZipEntry ZipEntry = new ZipEntry("ZippedFile");
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ZipStream.PutNextEntry(ZipEntry);
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ZipStream.SetLevel(6);
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ZipStream.Write(buffer, 0, buffer.Length);
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ZipStream.Finish();
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ZipStream.Close();
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}
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}
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/**//// <summary>
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/// 解压类
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/// </summary>
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public class UnZipClass
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{
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/**//// <summary>
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/// 解压功能(解压压缩文件到指定目录)
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/// </summary>
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/// <param name="args">待解压的文件</param>
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/// <param name="args">指定解压目标目录</param>
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public static void UnZip(string[] args)
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{
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ZipInputStream s = new ZipInputStream(File.OpenRead(@args[0].Trim()));
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ZipEntry theEntry;
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string directoryName = Path.GetDirectoryName(@args[1].Trim());
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if (!Directory.Exists(@args[1].Trim()))
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{
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Directory.CreateDirectory(directoryName);
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}
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while ((theEntry = s.GetNextEntry()) != null)
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{
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;
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string fileName = Path.GetFileName(theEntry.Name);
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if (fileName != String.Empty)
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{
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FileStream streamWriter = File.Create(@args[1].Trim() + fileName);
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int size = 2048;
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byte[] data = new byte[2048];
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while (true)
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{
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size = s.Read(data, 0, data.Length);
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if (size > 0)
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{
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streamWriter.Write(data, 0, size);
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}
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else
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{
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break;
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}
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}
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streamWriter.Close();
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}
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}
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s.Close();
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}
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2. 前台页面代码

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<body>
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<form id="form1" runat="server">
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<div>
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 <asp:Label ID="Label1" runat="server" BackColor="#C0C0FF" Font-Size="XX-Large"
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Height="44px" Text="压缩文件/文件夹示例" Width="366px"></asp:Label>
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<asp:Panel ID="Panel1" runat="server" Height="1px" Width="369px" BackColor="#FFFFC0">
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<table width="100%" height="100%">
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<tr>
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<td style="width: 3px" valign="top">
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<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>
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<br />
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<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
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 <br />
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<asp:Button ID="btZipDictory" runat="server" OnClick="btZipDictory_Click" Text="压缩目录" /><br />
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</td>
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<td style="width: 4px" valign="middle">
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<asp:Label ID="Label2" runat="server" Text="解压目录(from/to):" Width="154px"></asp:Label>
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<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
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<br />
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<asp:TextBox ID="TextBox4" runat="server"></asp:TextBox>
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 <br />
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<asp:Button ID="btUnZipDictory" runat="server" Text="解压目录" OnClick="btUnZipDictory_Click" /><br />
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</td>
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</tr>
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<tr>
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<td style="width: 3px; height: 150px" valign="top">
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<asp:Label ID="Label3" runat="server" Text="压缩文件(from/to):" Width="153px"></asp:Label>
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<asp:TextBox ID="TextBox5" runat="server"></asp:TextBox>
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<br />
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<asp:TextBox ID="TextBox6" runat="server"></asp:TextBox>
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 <br />
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<asp:Button ID="btZipFile" runat="server" Text="压缩文件" OnClick="btZipFile_Click" /><br />
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</td>
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<td style="width: 4px; height: 150px" valign="top">
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<asp:Label ID="Label4" runat="server" Text="解压文件(from/to):" Width="154px"></asp:Label>
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<asp:TextBox ID="TextBox7" runat="server"></asp:TextBox>
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<br />
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<asp:TextBox ID="TextBox8" runat="server"></asp:TextBox>
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 <br />
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<asp:Button ID="btUnZipFile" runat="server" Text="解压文件" OnClick="btUnZipFile_Click" /><br />
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</td>
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</tr>
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</table>
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<asp:Label ID="lbMessage" runat="server" Width="368px"></asp:Label><br />
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<br />
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</asp:Panel>
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</div>
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</form>
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</body>
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3. 后台页面代码

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public partial class _Default : System.Web.UI.Page
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{
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protected void Page_Load(object sender, EventArgs e)
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{
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}
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protected void btZipDictory_Click(object sender, EventArgs e)
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{
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string[] FilePathS = new string[2];
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FilePathS[0] = TextBox1.Text.Trim(); //待压缩的文件目录
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FilePathS[1] = TextBox2.Text.Trim(); //生成的目标文件
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ZipClass.ZipFileDictory(FilePathS);
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}
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protected void btUnZipDictory_Click(object sender, EventArgs e)
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{
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string[] FilePathS = new string[2];
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FilePathS[0] = TextBox3.Text.Trim(); //待解压的文件
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FilePathS[1] = TextBox4.Text.Trim(); //解压目标存放目录
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UnZipClass.UnZip(FilePathS);
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}
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protected void btZipFile_Click(object sender, EventArgs e)
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{
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string[] FilePathS = new string[2];
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FilePathS[0] = TextBox5.Text.Trim(); //待压缩的文件
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FilePathS[1] = TextBox6.Text.Trim(); //生成的压缩文件名
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ZipClass.ZipFile(FilePathS[0], FilePathS[1]);
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}
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protected void btUnZipFile_Click(object sender, EventArgs e)
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{
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string[] FilePathS = new string[2];
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FilePathS[0] = TextBox7.Text.Trim(); //待解压的文件
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FilePathS[1] = TextBox8.Text.Trim(); //解压目标存放目录
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UnZipClass.UnZip(FilePathS);
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}
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}
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(四). 示例代码下载
http://www.cnblogs.com/Files/ChengKing/ZIP.rar