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C# System.IO.Compression命名空间怎么实现

发表于：2025-01-20 作者：千家信息网编辑

千家信息网最后更新 2025年01月20日，这篇文章主要介绍"C# System.IO.Compression命名空间怎么实现"，在日常操作中，相信很多人在C# System.IO.Compression命名空间怎么实现问题上存在疑惑，小编查阅

千家信息网最后更新 2025年01月20日C# System.IO.Compression命名空间怎么实现

这篇文章主要介绍"C# System.IO.Compression命名空间怎么实现"，在日常操作中，相信很多人在C# System.IO.Compression命名空间怎么实现问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"C# System.IO.Compression命名空间怎么实现"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

C# System.IO.Compression命名空间，注意：此命名空间在 .NET Framework 2.0 版中是新增的。C# System.IO.Compression命名空间包含提供基本的流压缩和解压缩服务的类。GZipStream提供用于压缩和解压缩流的方法和属性。下面以 GZipStream 为例说明

注意：此类在 .NET Framework 2.0 版中是新增的。

提供用于压缩和解压缩流的方法和属性。
命名空间:System.IO.Compression
程序集:System（在 system.dll 中）
语法
Visual Basic（声明）
Public Class GZipStream
Inherits Stream
Visual Basic（用法）
Dim instance As GZipStream

C#
public class GZipStream : Stream

C++
public ref class GZipStream : public Stream

J#
public class GZipStream extends Stream

JScript
public class GZipStream extends Stream

classclsZip
...{
publicvoidCompressFile(stringsourceFile,stringdestinationFile)
...{
//makesurethesourcefileisthere
if(File.Exists(sourceFile)==false)
thrownewFileNotFoundException();
//Createthestreamsandbytearraysneeded
byte[]buffer=null;
FileStreamsourceStream=null;
FileStreamdestinationStream=null;
GZipStreamcompressedStream=null;
try
...{
//Readthebytesfromthesourcefileintoabytearray
sourceStream=newFileStream(sourceFile,FileMode.Open,FileAccess.Read,FileShare.Read);
//Readthesourcestreamvaluesintothebuffer
buffer=newbyte[sourceStream.Length];
intcheckCounter=sourceStream.Read(buffer,0,buffer.Length);
if(checkCounter!=buffer.Length)
...{
thrownewApplicationException();
}
//OpentheFileStreamtowriteto
destinationStream=newFileStream(destinationFile,FileMode.OpenOrCreate,FileAccess.Write);
//Createacompressionstreampointingtothedestiantionstream
compressedStream=newGZipStream(destinationStream,CompressionMode.Compress,true);
//Nowwritethecompresseddatatothedestinationfile
compressedStream.Write(buffer,0,buffer.Length);
}
catch(ApplicationExceptionex)
...{
MessageBox.Show(ex.Message,"压缩文件时发生错误：",MessageBoxButtons.OK,MessageBoxIcon.Error);
}
finally
...{
//Makesureweallwayscloseallstreams
if(sourceStream!=null)
sourceStream.Close();
if(compressedStream!=null)
compressedStream.Close();
if(destinationStream!=null)
destinationStream.Close();
}
}
publicvoidDecompressFile(stringsourceFile,stringdestinationFile)
...{
//makesurethesourcefileisthere
if(File.Exists(sourceFile)==false)
thrownewFileNotFoundException();
//Createthestreamsandbytearraysneeded
FileStreamsourceStream=null;
FileStreamdestinationStream=null;
GZipStreamdecompressedStream=null;
byte[]quartetBuffer=null;
try
...{
//Readinthecompressedsourcestream
sourceStream=newFileStream(sourceFile,FileMode.Open);
//Createacompressionstreampointingtothedestiantionstream
decompressedStream=newGZipStream(sourceStream,CompressionMode.Decompress,true);
//Readthefootertodeterminethelengthofthedestiantionfile
quartetBuffer=newbyte[4];
intposition=(int)sourceStream.Length-4;
sourceStream.Position=position;
sourceStream.Read(quartetBuffer,0,4);
sourceStream.Position=0;
intcheckLength=BitConverter.ToInt32(quartetBuffer,0);
byte[]buffer=newbyte[checkLength+100];
intoffset=0;
inttotal=0;
//Readthecompresseddataintothebuffer
while(true)
...{
intbytesRead=decompressedStream.Read(buffer,offset,100);
if(bytesRead==0)
break;
offset+=bytesRead;
total+=bytesRead;
}
//Nowwriteeverythingtothedestinationfile
destinationStream=newFileStream(destinationFile,FileMode.Create);
destinationStream.Write(buffer,0,total);
//andflusheveryhtingtocleanoutthebuffer
destinationStream.Flush();
}
catch(ApplicationExceptionex)
...{
MessageBox.Show(ex.Message,"解压文件时发生错误：",
MessageBoxButtons.OK,MessageBoxIcon.Error);
}
finally
...{
//Makesureweallwayscloseallstreams
if(sourceStream!=null)
sourceStream.Close();
if(decompressedStream!=null)
decompressedStream.Close();
if(destinationStream!=null)
destinationStream.Close();
}
}
}