如何压缩多个文件.docx
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如何压缩多个文件
如何压缩多个文件/文件夹
用例:
1.压缩
1 stringfolder=Path.Combine（Server.MapPath（"~"）,"TestCompress"）;
2 stringfile="file1.txt";
3 stringzip="myzip";
4
5 SampleCompress.Compress（Path.Combine（folder,file）,Path.Combine（folder,zip））;
2.解压
1 stringfolder=Path.Combine（Server.MapPath（"~"）,"TestCompress"）;
2 stringfile="file1.txt";
3 stringzip="myzip";
4
5 SampleCompress.Decompress（Path.Combine（folder,zip）,Path.Combine（Path.Combine（folder,"zipfolder"）,file））;
由代码和使用例子我们可以了解到,Code1只是支持单个文本文件的压缩/解压,代码非常简单,但是却实际上却没什么用途,功能太少,只是让你有个初步的认识.下面介绍Code2来实现本文的主题内容.
Code2:
publicclassGZip
{
///
///Compress
///
///Thelocationofthefilestoincludeinthezipfile,allfilesincludingfilesinsubfolderswillbeincluded.
///Foldertowritethezipfileinto
///Nameofthezipfiletowrite
publicstaticGZipResultCompress（stringlpSourceFolder,stringlpDestFolder,stringzipFileName）
{
returnCompress（lpSourceFolder,"*.*",SearchOption.AllDirectories,lpDestFolder,zipFileName,true）;
}
///
///Compress
///
///Thelocationofthefilestoincludeinthezipfile
///Searchpattern（ie"*.*"or"*.txt"or"*.gif"）toidendifywhatfilesinlpSourceFoldertoincludeinthezipfile
///OnlyfilesinlpSourceFolderorincludefilesinsubfoldersalso
///Foldertowritethezipfileinto
///Nameofthezipfiletowrite
///Boolean,truedeletedtheintermediatetempfile,falseleavesthetempfileinlpDestFolder（fordebugging）
publicstaticGZipResultCompress（stringlpSourceFolder,stringsearchPattern,SearchOptionsearchOption,stringlpDestFolder,stringzipFileName,booldeleteTempFile）
{
DirectoryInfodi=newDirectoryInfo（lpSourceFolder）;
FileInfo[]files=di.GetFiles（"*.*",searchOption）;
returnCompress（files,lpSourceFolder,lpDestFolder,zipFileName,deleteTempFile）;
}
///
///Compress
///
///ArrayofFileInfoobjectstobeincludedinthezipfile
///ArrayofFolderstring
///Basefoldertousewhencreatingrelativepathsforthefiles
///storedinthezipfile.Forexample,iflpBaseFolderis'C:
zipTestFiles',andthereisafile
///'C:
zipTestFilesfolder1sample.txt'inthe'files'array,therelativepathforsample.txt
///willbe'folder1/sample.txt'
///Foldertowritethezipfileinto
///Nameofthezipfiletowrite
publicstaticGZipResultCompress（FileInfo[]files,string[]folders,stringlpBaseFolder,stringlpDestFolder,stringzipFileName）
{
//supportcompressfolder
IListlist=newList（）;
foreach（FileInfoliinfiles）
list.Add（li）;
foreach（stringstrinfolders）
{
DirectoryInfodi=newDirectoryInfo（str）;
foreach（FileInfoinfoindi.GetFiles（"*.*",SearchOption.AllDirectories））
{
list.Add（info）;
}
}
returnCompress（list.ToArray（）,lpBaseFolder,lpDestFolder,zipFileName,true）;
}
///
///Compress
///
///ArrayofFileInfoobjectstobeincludedinthezipfile
///Basefoldertousewhencreatingrelativepathsforthefiles
///storedinthezipfile.Forexample,iflpBaseFolderis'C:
zipTestFiles',andthereisafile
///'C:
zipTestFilesfolder1sample.txt'inthe'files'array,therelativepathforsample.txt
///willbe'folder1/sample.txt'
///Foldertowritethezipfileinto
///Nameofthezipfiletowrite
publicstaticGZipResultCompress（FileInfo[]files,stringlpBaseFolder,stringlpDestFolder,stringzipFileName）
{
returnCompress（files,lpBaseFolder,lpDestFolder,zipFileName,true）;
}
///
///Compress
///
///ArrayofFileInfoobjectstobeincludedinthezipfile
///Basefoldertousewhencreatingrelativepathsforthefiles
///storedinthezipfile.Forexample,iflpBaseFolderis'C:
zipTestFiles',andthereisafile
///'C:
zipTestFilesfolder1sample.txt'inthe'files'array,therelativepathforsample.txt
///willbe'folder1/sample.txt'
///Foldertowritethezipfileinto
///Nameofthezipfiletowrite
///Boolean,truedeletedtheintermediatetempfile,falseleavesthetempfileinlpDestFolder（fordebugging）
publicstaticGZipResultCompress（FileInfo[]files,stringlpBaseFolder,stringlpDestFolder,stringzipFileName,booldeleteTempFile）
{
GZipResultresult=newGZipResult（）;
try
{
if（!
lpDestFolder.EndsWith（""））
{
lpDestFolder+="";
}
stringlpTempFile=lpDestFolder+zipFileName+".tmp";
stringlpZipFile=lpDestFolder+zipFileName;
result.TempFile=lpTempFile;
result.ZipFile=lpZipFile;
if（files!
=null&&files.Length>0）
{
CreateTempFile（files,lpBaseFolder,lpTempFile,result）;
if（result.FileCount>0）
{
CreateZipFile（lpTempFile,lpZipFile,result）;
}
//deletethetempfile
if（deleteTempFile）
{
File.Delete（lpTempFile）;
result.TempFileDeleted=true;
}
}
}
catch//（Exceptionex4）
{
result.Errors=true;
}
returnresult;
}
privatestaticvoidCreateZipFile（stringlpSourceFile,stringlpZipFile,GZipResultresult）
{
byte[]buffer;
intcount=0;
FileStreamfsOut=null;
FileStreamfsIn=null;
GZipStreamgzip=null;
//compressthefileintothezipfile
try
{
fsOut=newFileStream（lpZipFile,FileMode.Create,FileAccess.Write,FileShare.None）;
gzip=newGZipStream（fsOut,CompressionMode.Compress,true）;
fsIn=newFileStream（lpSourceFile,FileMode.Open,FileAccess.Read,FileShare.Read）;
buffer=newbyte[fsIn.Length];
count=fsIn.Read（buffer,0,buffer.Length）;
fsIn.Close（）;
fsIn=null;
//compresstothezipfile
gzip.Write（buffer,0,buffer.Length）;
result.ZipFileSize=fsOut.Length;
result.CompressionPercent=GetCompressionPercent（result.TempFileSize,result.ZipFileSize）;
}
catch//（Exceptionex1）
{
result.Errors=true;
}
finally
{
if（gzip!
=null）
{
gzip.Close（）;
gzip=null;
}
if（fsOut!
=null）
{
fsOut.Close（）;
fsOut=null;
}
if（fsIn!
=null）
{
fsIn.Close（）;
fsIn=null;
}
}
}
privatestaticvoidCreateTempFile（FileInfo[]files,stringlpBaseFolder,stringlpTempFile,GZipResultresult）
{
byte[]buffer;
intcount=0;
byte[]header;
stringfileHeader=null;
stringfileModDate=null;
stringlpFolder=null;
intfileIndex=0;
stringlpSourceFile=null;
stringvpSourceFile=null;
GZipFileInfogzf=null;
FileStreamfsOut=null;
FileStreamfsIn=null;
if（files!
=null&&files.Length>0）
{
try
{
result.Files=newGZipFileInfo[files.Length];
//openthetempfileforwriting
fsOut=newFileStream（lpTempFile,FileMode.Create,FileAccess.Write,FileShare.None）;
foreach（FileInfofiinfiles）
{
lpFolder=fi.DirectoryName+"";
try
{
gzf=newGZipFileInfo（）;
gzf.Index=fileIndex;
//readthesourcefile,getitsvirtualpathwithinthesourcefolder
lpSourceFile=fi.FullName;
gzf.LocalPath=lpSourceFile;
vpSourceFile=lpSourceFile.Replace（lpBaseFolder,string.Empty）;
vpSourceFile=vpSourceFile.Replace（"","/"）;
gzf.RelativePath=vpSourceFile;
fsIn=newFileStream（lpSourceFile,FileMode.Open,FileAccess.Read,FileShare.Read）;
buffer=newbyte[fsIn.Length];
count=fsIn.Read（buffer,0,buffer.Length）;
fsIn.Close（）;
fsIn=null;
fileModDate=fi.LastWriteTimeUtc.ToString（）;
gzf.ModifiedDate=fi.LastWriteTimeUtc;
gzf.Length=buffer.Length;
fileHeader=fileIndex.ToString（）+","+vpSourceFile+","+fileModDate+","+buffer.Length.ToString（）+"n";
header=Encoding.Default.GetBytes（fileHeader）;
fsOut.Write（header,0,header.Length）;
fsOut.Write（buffer,0,buffer.Length）;
fsOut.Write
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