blocks|key|2749658|text|您可以在各种其他库中使用SharpZipLib来实现这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2749659|您可以使用以下代码示例将其解压缩为MemoryStream、as+shown+on+their+wiki|style|CODE|2749660|using+ICSharpCode.SharpZipLib.Zip;

//+Compresses+the+supplied+memory+stream,+naming+it+as+zipEntryName,+into+a+zip,
//+which+is+returned+as+a+memory+stream+or+a+byte+array.
//
public+MemoryStream+CreateToMemoryStream(MemoryStream+memStreamIn,+string+zipEntryName)+{

++++MemoryStream+outputMemStream+=+new+MemoryStream();
++++ZipOutputStream+zipStream+=+new+ZipOutputStream(outputMemStream);

++++zipStream.SetLevel(3);+//0-9,+9+being+the+highest+level+of+compression

++++ZipEntry+newEntry+=+new+ZipEntry(zipEntryName);
++++newEntry.DateTime+=+DateTime.Now;

++++zipStream.PutNextEntry(newEntry);

++++StreamUtils.Copy(memStreamIn,+zipStream,+new+byte[4096]);
++++zipStream.CloseEntry();

++++zipStream.IsStreamOwner+=+false;++++//+False+stops+the+Close+also+Closing+the+underlying+stream.
++++zipStream.Close();++++++++++//+Must+finish+the+ZipOutputStream+before+using+outputMemStream.

++++outputMemStream.Position+=+0;
++++return+outputMemStream;

++++//+Alternative+outputs:
++++//+ToArray+is+the+cleaner+and+easiest+to+use+correctly+with+the+penalty+of+duplicating+allocated+memory.
++++byte[]+byteArrayOut+=+outputMemStream.ToArray();

++++//+GetBuffer+returns+a+raw+buffer+raw+and+so+you+need+to+account+for+the+true+length+yourself.
++++byte[]+byteArrayOut+=+outputMemStream.GetBuffer();
++++long+len+=+outputMemStream.Length;
}|code-block|syntax|javascript|2749661|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/icsharpcode/SharpZipLib/|1|https://github.com/icsharpcode/SharpZipLib/wiki/Zip-Samples#anchorMemory^0|C|B|0|0|H|C|U|M|1|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@$A|11|B|12|F|G]]|9|@$A|13|B|14|1|15]]|C|$]]|$1|H|3|I|5|J|7|16|8|@]|9|@]|C|$K|L]]|$1|M|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

You can use <a href="https://github.com/icsharpcode/SharpZipLib/" rel="nofollow">SharpZipLib</a> among a variety of other libraries to achieve this.

You can use the following code example to unzip to a <code>MemoryStream</code>, <a href="https://github.com/icsharpcode/SharpZipLib/wiki/Zip-Samples#anchorMemory" rel="nofollow">as shown on their wiki</a>:

<pre><code>using ICSharpCode.SharpZipLib.Zip;

// Compresses the supplied memory stream, naming it as zipEntryName, into a zip,
// which is returned as a memory stream or a byte array.
//
public MemoryStream CreateToMemoryStream(MemoryStream memStreamIn, string zipEntryName) {

 MemoryStream outputMemStream = new MemoryStream();
 ZipOutputStream zipStream = new ZipOutputStream(outputMemStream);

 zipStream.SetLevel(3); //0-9, 9 being the highest level of compression

 ZipEntry newEntry = new ZipEntry(zipEntryName);
 newEntry.DateTime = DateTime.Now;

 zipStream.PutNextEntry(newEntry);

 StreamUtils.Copy(memStreamIn, zipStream, new byte[4096]);
 zipStream.CloseEntry();

 zipStream.IsStreamOwner = false; // False stops the Close also Closing the underlying stream.
 zipStream.Close(); // Must finish the ZipOutputStream before using outputMemStream.

 outputMemStream.Position = 0;
 return outputMemStream;

 // Alternative outputs:
 // ToArray is the cleaner and easiest to use correctly with the penalty of duplicating allocated memory.
 byte[] byteArrayOut = outputMemStream.ToArray();

 // GetBuffer returns a raw buffer raw and so you need to account for the true length yourself.
 byte[] byteArrayOut = outputMemStream.GetBuffer();
 long len = outputMemStream.Length;
}
</code></pre>

blocks|key|157714|text|看起来这就是你需要的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|157715|using+(var+za+=+ZipFile.OpenRead(path))
{
++++foreach+(var+entry+in+za.Entries)
++++{
++++++++using+(var+r+=+new+StreamReader(entry.Open()))
++++++++{
++++++++++++//your+code+here
++++++++}
++++}
}|code-block|syntax|javascript|157716|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Looks like here is what you need:
<pre><code>using (var za = ZipFile.OpenRead(path))
{
 foreach (var entry in za.Entries)
 {
 using (var r = new StreamReader(entry.Open()))
 {
 //your code here
 }
 }
}
</code></pre>

blocks|key|2749745|text|您可以使用ZipArchiveEntry.Open来获取流。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2749746|这段代码假设zip归档文件有一个文本文件。|2749747|using+(FileStream+fs+=+new+FileStream(path,+FileMode.Open))
using+(ZipArchive+zip+=+new+ZipArchive(fs)+)
{
++++var+entry+=+zip.Entries.First();

++++using+(StreamReader+sr+=+new+StreamReader(entry.Open()))
++++{
++++++++Console.WriteLine(sr.ReadToEnd());
++++}
}|code-block|syntax|javascript|2749748|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.io.compression.ziparchiveentry.open%2528v=vs.110%2529.aspx^0|5|K|5|K|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|G|5|6|7|10|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|11|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

You can use <a href="http://msdn.microsoft.com/en-us/library/system.io.compression.ziparchiveentry.open%28v=vs.110%29.aspx" rel="noreferrer"><code>ZipArchiveEntry.Open</code></a> to get a stream.

This code assumes the zip archive has one text file.

<pre><code>using (FileStream fs = new FileStream(path, FileMode.Open))
using (ZipArchive zip = new ZipArchive(fs) )
{
 var entry = zip.Entries.First();

 using (StreamReader sr = new StreamReader(entry.Open()))
 {
 Console.WriteLine(sr.ReadToEnd());
 }
}
</code></pre>

blocks|key|2749794|text|Zip压缩支持是内置的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2749795|using+System.IO;
using+System.IO.Compression;
//+%5E%5E%5E+requires+a+reference+to+System.IO.Compression.dll
static+class+Program
{
++++const+string+path+=+...
++++static+void+Main()
++++{
++++++++using(var+file+=+File.OpenRead(path))
++++++++using(var+zip+=+new+ZipArchive(file,+ZipArchiveMode.Read))
++++++++{
++++++++++++foreach(var+entry+in+zip.Entries)
++++++++++++{
++++++++++++++++using(var+stream+=+entry.Open())
++++++++++++++++{
++++++++++++++++++++//+do+whatever+we+want+with+stream
++++++++++++++++++++//+...
++++++++++++++++}
++++++++++++}
++++++++}
++++}
}|code-block|syntax|javascript|2749796|通常，你应该避免将其复制到另一个流中--只需“按原样”使用它，然而，如果你在一个MemoryStream中绝对需要它，你可以这样做：|offset|length|style|CODE|2749797|using(var+ms+=+new+MemoryStream())
{
++++stream.CopyTo(ms);
++++ms.Position+=+0;+//+rewind
++++//+do+something+with+ms
}|2749798|entityMap^0|0|0|14|C|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Zip compression support is built in:

<pre><code>using System.IO;
using System.IO.Compression;
// ^^^ requires a reference to System.IO.Compression.dll
static class Program
{
 const string path = ...
 static void Main()
 {
 using(var file = File.OpenRead(path))
 using(var zip = new ZipArchive(file, ZipArchiveMode.Read))
 {
 foreach(var entry in zip.Entries)
 {
 using(var stream = entry.Open())
 {
 // do whatever we want with stream
 // ...
 }
 }
 }
 }
}
</code></pre>

Normally you should avoid copying it into another stream - just use it "as is", however, if you absolutely need it in a <code>MemoryStream</code>, you could do:

<pre><code>using(var ms = new MemoryStream())
{
 stream.CopyTo(ms);
 ms.Position = 0; // rewind
 // do something with ms
}
</code></pre>

blocks|key|159003|text|using+(ZipArchive+archive+=+new+ZipArchive(webResponse.GetResponseStream()))
{
+++++foreach+(ZipArchiveEntry+entry+in+archive.Entries)
+++++{
++++++++Stream+s+=+entry.Open();
++++++++var+sr+=+new+StreamReader(s);
++++++++var+myStr+=+sr.ReadToEnd();
+++++}
}+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|159004|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>using (ZipArchive archive = new ZipArchive(webResponse.GetResponseStream()))
{
 foreach (ZipArchiveEntry entry in archive.Entries)
 {
 Stream s = entry.Open();
 var sr = new StreamReader(s);
 var myStr = sr.ReadToEnd();
 }
} 
</code></pre>

blocks|key|2962524|text|好的，结合以上所有内容，假设您想以一种非常简单的方式获取一个名为"file.zip“的压缩文件，并将其解压缩到"C:\temp”文件夹中。(注意:此示例仅针对压缩文本文件进行了测试)您可能需要对二进制文件进行一些修改。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2962525|++++++++using+System.IO;
++++++++using+System.IO.Compression;

++++++++static+void+Main(string[]+args)
++++++++{
++++++++++++//Call+it+like+this:
++++++++++++Unzip("file.zip",@"C:\temp");
++++++++}

++++++++static+void+Unzip(string+sourceZip,+string+targetPath)
++++++++{
++++++++++++using+(var+z+=+ZipFile.OpenRead(sourceZip))
++++++++++++{
++++++++++++++++foreach+(var+entry+in+z.Entries)
++++++++++++++++{++++++++++++++++++++
++++++++++++++++++++using+(var+r+=+new+StreamReader(entry.Open()))
++++++++++++++++++++{
++++++++++++++++++++++++string+uncompressedFile+=+Path.Combine(targetPath,+entry.Name);
++++++++++++++++++++++++File.WriteAllText(uncompressedFile,r.ReadToEnd());
++++++++++++++++++++}
++++++++++++++++}
++++++++++++}

++++++++}|code-block|syntax|javascript|2962526|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Ok so combining all of the above, suppose you want to in a very simple way take a zip file called 
"file.zip" and extract it to "C:\temp" folder. (Note: This example was only tested for compress text files) You may need to do some modifications for binary files. 

<pre><code> using System.IO;
 using System.IO.Compression;

 static void Main(string[] args)
 {
 //Call it like this:
 Unzip("file.zip",@"C:\temp");
 }

 static void Unzip(string sourceZip, string targetPath)
 {
 using (var z = ZipFile.OpenRead(sourceZip))
 {
 foreach (var entry in z.Entries)
 { 
 using (var r = new StreamReader(entry.Open()))
 {
 string uncompressedFile = Path.Combine(targetPath, entry.Name);
 File.WriteAllText(uncompressedFile,r.ReadToEnd());
 }
 }
 }

 }
</code></pre>

I have files (from 3rd parties) that are being FTP'd to a directory on our server. I download them and process them even 'x' minutes. Works great.

Now, some of the files are <code>.zip</code> files. Which means I can't process them. I need to unzip them first.

FTP has no concept of zip/unzipping - so I'll need to grab the zip file, unzip it, then process it.

Looking at the <a href="http://msdn.microsoft.com/en-us/library/system.io.compression.zipfile%28v=vs.110%29.aspx">MSDN zip api</a>, there seems to be no way i can unzip to a memory stream?

So is the only way to do this...

<ol>
<li>Unzip to a file (what directory? need some -very- temp location ...)</li>
<li>Read the file contents</li>
<li>Delete file.</li>
</ol>

NOTE: The contents of the file are small - say 4k &lt;-> 1000k.

How can I unzip a file to a .NET memory stream?

服务器

我有文件(从第三方)是FTP的，在我们的服务器上的目录。我下载它们并处理它们，即使是“x”分钟。效果很好。现在，其中一些文件是.zip文件。这意味着我不能处理它们。我得先解开拉链。FTP没有zip/unzipping的概念-所以我需要抓取zip文件，解压缩它，然后处理它。看看，似乎没有办法解压到内存流？所以唯一的办法就...

问如何将文件解压缩为.NET内存流？
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