Question

我想使用SevenZipCompressor将3个文件夹压缩到一个文件中。我知道如何压缩单个文件夹。这样的事情有可能吗？

谢谢！

Answer 1

SevenZipCompressor类提供了一个名为CompressFileDictionary()的方法。其中一个方法重载需要文件字典和文件流。文件字典是普通的.Net Dictionary<string,string>。字典的关键是文件的名称（或相对路径）存档，字典的值是文件系统中文件的路径。

字典的键允许您控制7z存档中的结构。例如，如果要压缩三个文件夹

c:\temp\testdir1
             |- file1.txt
             |- file2.txt
c:\temp\testdir2
             |- file1.txt
c:\temp2\test
             |- file3.txt

并且归档中的结果应该是

testdir1
       |- file1.txt
       |- file2.txt
testdir2
       |- file1.txt
    test
       |-file3.txt

然后只需按以下方式将文件添加到dictonary：

Dictionary<string, string> filesDic = new Dictionary<string, string>();

filesDic.Add(@"testdir1\file1.txt", @"c:\temp\testdir1\files1.txt");
filesDic.Add(@"testdir1\file2.txt", @"c:\temp\testdir1\files2.txt");
filesDic.Add(@"testdir2\file1.txt", @"c:\temp\testdir2\files1.txt");
filesDic.Add(@"test\file3.txt", @"c:\temp2\test\files3.txt");

以下示例仅显示如何自动创建过程这样的文件夹字典并将其压缩为单个7z存档文件。

private static void AddFilesFromDirectoryToDictionary(Dictionary<string, string> filesDictionary,
  string pathToDirectory)
{      
  DirectoryInfo dirInfo = new DirectoryInfo(pathToDirectory);      

  FileInfo[] fileInfos = dirInfo.GetFiles("*.*", SearchOption.AllDirectories);

  foreach (FileInfo fi in fileInfos)
  {        
    filesDictionary.Add(fi.FullName.Replace(dirInfo.Parent.FullName + "\\", "").ToLower(),
      fi.FullName);
  }        
}

static void Main(string[] args)
{
  // Set path to 7z library.
  SevenZipCompressor.SetLibraryPath("7z.dll");

  using (FileStream fs = new FileStream("c:\\temp\\test.7z", FileMode.Create))
  {        
    SevenZipCompressor szc = new SevenZipCompressor
                                 {
                                   CompressionMethod = CompressionMethod.Lzma,
                                   CompressionLevel = CompressionLevel.Normal,
                                   CompressionMode = CompressionMode.Create,                                      
                                   DirectoryStructure = true,
                                   PreserveDirectoryRoot = false,
                                   ArchiveFormat = OutArchiveFormat.SevenZip
                                 };        

    Dictionary<string, string> filesDictionary = new Dictionary<string, string>();

    AddFilesFromDirectoryToDictionary(filesDictionary, @"c:\temp\testdir1");
    AddFilesFromDirectoryToDictionary(filesDictionary, @"c:\temp\testdir2");
    AddFilesFromDirectoryToDictionary(filesDictionary, @"c:\temp2\test");

    szc.CompressFileDictionary(filesDictionary, fs);                               
  }      
}

您还可以使用以下代码更改创建 ZIP-archive ：

using (FileStream fs = new FileStream("c:\\temp\\test.zip", FileMode.Create))
{        
  SevenZipCompressor szc = new SevenZipCompressor
          {
            CompressionMethod = CompressionMethod.Deflate,
            CompressionLevel = CompressionLevel.Normal,
            CompressionMode = CompressionMode.Create,                                      
            DirectoryStructure = true,
            PreserveDirectoryRoot = false,
            ArchiveFormat = OutArchiveFormat.Zip
          };        

   Dictionary<string, string> filesDictionary = new Dictionary<string, string>();

   AddFilesFromDirectoryToDictionary(filesDictionary, @"c:\temp\testdir1");
   AddFilesFromDirectoryToDictionary(filesDictionary, @"c:\temp\testdir2");
   AddFilesFromDirectoryToDictionary(filesDictionary, @"c:\temp2\test");

   szc.CompressFileDictionary(filesDictionary, fs);                               
 }

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