用SharpZipLib来压缩和解压文件
1.建立工程，添加引用，添加SharpZipLib.dll
2.建立压缩和解压类CompressionFile.cs
添加如下代码
using System;
using System.IO;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.GZip;
using ICSharpCode.SharpZipLib.BZip2;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip.Compression;
using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
namespace WebApplication3
{
ZipClass 压缩文件 ZipClass 压缩文件
public class ZipClass
{
public void ZipFile(string FileToZip, string ZipedFile ,int CompressionLevel, int BlockSize,string password)
{
//如果文件没有找到，则报错
if (! System.IO.File.Exists(FileToZip))
{
throw new System.IO.FileNotFoundException("The specified file " + FileToZip + " could not be found. Zipping aborderd");
}
System.IO.FileStream StreamToZip = new System.IO.FileStream(FileToZip,System.IO.FileMode.Open , System.IO.FileAccess.Read);
System.IO.FileStream ZipFile = System.IO.File.Create(ZipedFile);
ZipOutputStream ZipStream = new ZipOutputStream(ZipFile);
ZipEntry ZipEntry = new ZipEntry("ZippedFile");
ZipStream.PutNextEntry(ZipEntry);
ZipStream.SetLevel(CompressionLevel);
byte[] buffer = new byte[BlockSize];
System.Int32 size =StreamToZip.Read(buffer,0,buffer.Length);
ZipStream.Write(buffer,0,size);
try
{
while (size < StreamToZip.Length)
{
int sizeRead =StreamToZip.Read(buffer,0,buffer.Length);
ZipStream.Write(buffer,0,sizeRead);
size += sizeRead;
}
}
catch(System.Exception ex)
{
throw ex;
}
ZipStream.Finish();
ZipStream.Close();
StreamToZip.Close();
}
public void ZipFileMain(string[] args)
{
//string[] filenames = Directory.GetFiles(args[0]);
string[] filenames = new string[]{args[0]};
Crc32 crc = new Crc32();
ZipOutputStream s = new ZipOutputStream(File.Create(args[1]));
s.SetLevel(6); // 0 - store only to 9 - means best compression
foreach (string file in filenames)
{
//打开压缩文件
FileStream fs = File.OpenRead(file);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
ZipEntry entry = new ZipEntry(file);
entry.DateTime = DateTime.Now;
// set Size and the crc, because the information
// about the size and crc should be stored in the header
// if it is not set it is automatically written in the footer.
// (in this case size == crc == -1 in the header)
// Some ZIP programs have problems with zip files that don't store
// the size and crc in the header.
entry.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
}
s.Finish();
s.Close();
}
}
#endregion
UnZipClass 解压文件 UnZipClass 解压文件
public class UnZipClass
{
/// <summary>
/// 解压文件
/// </summary>
/// <param name="args">包含要解压的文件名和要解压到的目录名数组</param>
public void UnZip(string[] args)
{
ZipInputStream s = new ZipInputStream(File.OpenRead(args[0]));
try
{
ZipEntry theEntry;
while ((theEntry = s.GetNextEntry()) != null)
{
string directoryName = Path.GetDirectoryName(args[1]);
string fileName = Path.GetFileName(theEntry.Name);
//生成解压目录
Directory.CreateDirectory(directoryName);
if (fileName != String.Empty)
{
//解压文件到指定的目录
FileStream streamWriter = File.Create(args[1]+fileName);
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;
}
}
streamWriter.Close();
}
}
s.Close();
}
catch(Exception eu)
{
throw eu;
}
finally
{
s.Close();
}
}//end UnZip
}//end UnZipClass
#endregion
AttachmentUnZip AttachmentUnZip
public class AttachmentUnZip
{
public AttachmentUnZip()
{
}
public static void UpZip(string zipFile)
{
string []FileProperties=new string[2];
FileProperties[0]=zipFile;//待解压的文件
FileProperties[1]=zipFile.Substring(0,zipFile.LastIndexOf("""")+1);//解压后放置的目标目录
UnZipClass UnZc=new UnZipClass();
UnZc.UnZip(FileProperties);
}
}
#endregion
}
3.建立测试页面
3.1html
<HTML>
<HEAD>
<title>WebForm1</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:Button id="Button1" style="Z-INDEX: 101; LEFT: 56px; POSITION: absolute; TOP: 64px" runat="server"
Text="压缩"></asp:Button>
<asp:Button id="Button2" style="Z-INDEX: 102; LEFT: 112px; POSITION: absolute; TOP: 64px" runat="server"
Text="解压"></asp:Button><INPUT id="File1" style="Z-INDEX: 103; LEFT: 32px; POSITION: absolute; TOP: 24px" type="file"
name="File1" runat="server">
</form>
</body>
</HTML>
3.2 cs代码
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.HtmlControls.HtmlInputFile File1;
protected System.Web.UI.WebControls.Button Button2;
private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
}
Web Form Designer generated code Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.Button1.Click += new System.EventHandler(this.Button1_Click);
this.Button2.Click += new System.EventHandler(this.Button2_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
压缩 压缩
private void Button1_Click(object sender, System.EventArgs e)
{
string []FileProperties=new string[2];
string fullName=this.File1.PostedFile.FileName;//C:"test"a.txt
string destPath=System.IO.Path.GetDirectoryName(fullName);//C:"test
//待压缩文件
FileProperties[0]=fullName;
//压缩后的目标文件
FileProperties[1]= destPath +""""+ System.IO.Path.GetFileNameWithoutExtension(fullName)+".zip";
ZipClass Zc=new ZipClass();
Zc.ZipFileMain(FileProperties);
//删除压缩前的文件
System.IO.File.Delete(fullName);
}
#endregion
解压 解压
private void Button2_Click(object sender, System.EventArgs e)
{
string fullName=this.File1.PostedFile.FileName;//C:"test"a.zip
//解压文件
AttachmentUnZip.UpZip(fullName);
}
#endregion
2.建立压缩和解压类CompressionFile.cs
添加如下代码
using System;using System.IO;using ICSharpCode.SharpZipLib.Zip;using ICSharpCode.SharpZipLib.GZip;using ICSharpCode.SharpZipLib.BZip2;using ICSharpCode.SharpZipLib.Checksums;using ICSharpCode.SharpZipLib.Zip.Compression;using ICSharpCode.SharpZipLib.Zip.Compression.Streams;namespace WebApplication3{
ZipClass 压缩文件 ZipClass 压缩文件 public class ZipClass { public void ZipFile(string FileToZip, string ZipedFile ,int CompressionLevel, int BlockSize,string password) { //如果文件没有找到，则报错 if (! System.IO.File.Exists(FileToZip)) { throw new System.IO.FileNotFoundException("The specified file " + FileToZip + " could not be found. Zipping aborderd"); } System.IO.FileStream StreamToZip = new System.IO.FileStream(FileToZip,System.IO.FileMode.Open , System.IO.FileAccess.Read); System.IO.FileStream ZipFile = System.IO.File.Create(ZipedFile); ZipOutputStream ZipStream = new ZipOutputStream(ZipFile); ZipEntry ZipEntry = new ZipEntry("ZippedFile"); ZipStream.PutNextEntry(ZipEntry); ZipStream.SetLevel(CompressionLevel); byte[] buffer = new byte[BlockSize]; System.Int32 size =StreamToZip.Read(buffer,0,buffer.Length); ZipStream.Write(buffer,0,size); try { while (size < StreamToZip.Length) { int sizeRead =StreamToZip.Read(buffer,0,buffer.Length); ZipStream.Write(buffer,0,sizeRead); size += sizeRead; } } catch(System.Exception ex) { throw ex; } ZipStream.Finish(); ZipStream.Close(); StreamToZip.Close(); } public void ZipFileMain(string[] args) { //string[] filenames = Directory.GetFiles(args[0]); string[] filenames = new string[]{args[0]}; Crc32 crc = new Crc32(); ZipOutputStream s = new ZipOutputStream(File.Create(args[1])); s.SetLevel(6); // 0 - store only to 9 - means best compression foreach (string file in filenames) { //打开压缩文件 FileStream fs = File.OpenRead(file); byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); ZipEntry entry = new ZipEntry(file); entry.DateTime = DateTime.Now; // set Size and the crc, because the information // about the size and crc should be stored in the header // if it is not set it is automatically written in the footer. // (in this case size == crc == -1 in the header) // Some ZIP programs have problems with zip files that don't store // the size and crc in the header. entry.Size = fs.Length; fs.Close(); crc.Reset(); crc.Update(buffer); entry.Crc = crc.Value; s.PutNextEntry(entry); s.Write(buffer, 0, buffer.Length); } s.Finish(); s.Close(); } } #endregion UnZipClass 解压文件 UnZipClass 解压文件 public class UnZipClass { /// <summary> /// 解压文件 /// </summary> /// <param name="args">包含要解压的文件名和要解压到的目录名数组</param> public void UnZip(string[] args) { ZipInputStream s = new ZipInputStream(File.OpenRead(args[0])); try { ZipEntry theEntry; while ((theEntry = s.GetNextEntry()) != null) { string directoryName = Path.GetDirectoryName(args[1]); string fileName = Path.GetFileName(theEntry.Name); //生成解压目录 Directory.CreateDirectory(directoryName); if (fileName != String.Empty) { //解压文件到指定的目录 FileStream streamWriter = File.Create(args[1]+fileName); 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; } } streamWriter.Close(); } } s.Close(); } catch(Exception eu) { throw eu; } finally { s.Close(); } }//end UnZip }//end UnZipClass #endregion AttachmentUnZip AttachmentUnZip public class AttachmentUnZip { public AttachmentUnZip() { } public static void UpZip(string zipFile) { string []FileProperties=new string[2]; FileProperties[0]=zipFile;//待解压的文件 FileProperties[1]=zipFile.Substring(0,zipFile.LastIndexOf("""")+1);//解压后放置的目标目录 UnZipClass UnZc=new UnZipClass(); UnZc.UnZip(FileProperties); } } #endregion}3.1html
<HTML> <HEAD> <title>WebForm1</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Form1" method="post" runat="server"> <asp:Button id="Button1" style="Z-INDEX: 101; LEFT: 56px; POSITION: absolute; TOP: 64px" runat="server" Text="压缩"></asp:Button> <asp:Button id="Button2" style="Z-INDEX: 102; LEFT: 112px; POSITION: absolute; TOP: 64px" runat="server" Text="解压"></asp:Button><INPUT id="File1" style="Z-INDEX: 103; LEFT: 32px; POSITION: absolute; TOP: 24px" type="file" name="File1" runat="server"> </form> </body></HTML>public class WebForm1 : System.Web.UI.Page { protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.HtmlControls.HtmlInputFile File1; protected System.Web.UI.WebControls.Button Button2; private void Page_Load(object sender, System.EventArgs e) { // Put user code to initialize the page here } Web Form Designer generated code Web Form Designer generated code override protected void OnInit(EventArgs e) { // // CODEGEN: This call is required by the ASP.NET Web Form Designer. // InitializeComponent(); base.OnInit(e); } /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.Button1.Click += new System.EventHandler(this.Button1_Click); this.Button2.Click += new System.EventHandler(this.Button2_Click); this.Load += new System.EventHandler(this.Page_Load); } #endregion 压缩 压缩 private void Button1_Click(object sender, System.EventArgs e) { string []FileProperties=new string[2]; string fullName=this.File1.PostedFile.FileName;//C:"test"a.txt string destPath=System.IO.Path.GetDirectoryName(fullName);//C:"test //待压缩文件 FileProperties[0]=fullName; //压缩后的目标文件 FileProperties[1]= destPath +""""+ System.IO.Path.GetFileNameWithoutExtension(fullName)+".zip"; ZipClass Zc=new ZipClass(); Zc.ZipFileMain(FileProperties); //删除压缩前的文件 System.IO.File.Delete(fullName); } #endregion 解压 解压 private void Button2_Click(object sender, System.EventArgs e) { string fullName=this.File1.PostedFile.FileName;//C:"test"a.zip //解压文件 AttachmentUnZip.UpZip(fullName); } #endregion }
