使用 c# 解压缩 .gz 文件

Question

如何使用c#解压.gz文件并将文件保存在特定文件夹中？

这是我第一次遇到 .gz 文件。我已经搜索了如何解压缩它但它对我不起作用。它没有将 .gz 文件解压缩到特定文件夹中。我不想使用任何第三方应用程序。

谁能给我一个关于如何解压缩它的示例代码。然后将文件保存在文件夹中。谢谢。

Answer 1

.Net 有GZipStream

API 中列出的示例...

public static void Decompress(FileInfo fileToDecompress)
    {
        using (FileStream originalFileStream = fileToDecompress.OpenRead())
        {
            string currentFileName = fileToDecompress.FullName;
            string newFileName = currentFileName.Remove(currentFileName.Length - fileToDecompress.Extension.Length);

            using (FileStream decompressedFileStream = File.Create(newFileName))
            {
                using (GZipStream decompressionStream = new GZipStream(originalFileStream, CompressionMode.Decompress))
                {
                    decompressionStream.CopyTo(decompressedFileStream);
                    Console.WriteLine("Decompressed: {0}", fileToDecompress.Name);
                }
            }
        }
    }

Answer 2

MSDN 中的以下示例显示了如何使用 GZipStream 类来压缩和解压缩文件目录。

namespace zip
{
    public class Program
    {
        public static void Main()
        {
            string directoryPath = @"c:\users\public\reports";

            DirectoryInfo directorySelected = new DirectoryInfo(directoryPath);

            foreach (FileInfo fileToCompress in directorySelected.GetFiles())
            {
                Compress(fileToCompress);
            }

            foreach (FileInfo fileToDecompress in directorySelected.GetFiles("*.gz"))
            {
                Decompress(fileToDecompress);
            }
        }

        public static void Compress(FileInfo fileToCompress)
        {
            using (FileStream originalFileStream = fileToCompress.OpenRead())
            {
                if ((File.GetAttributes(fileToCompress.FullName) & FileAttributes.Hidden) != FileAttributes.Hidden & fileToCompress.Extension != ".gz")
                {
                    using (FileStream compressedFileStream = File.Create(fileToCompress.FullName + ".gz"))
                    {
                        using (GZipStream compressionStream = new GZipStream(compressedFileStream, CompressionMode.Compress))
                        {
                            originalFileStream.CopyTo(compressionStream);
                            Console.WriteLine("Compressed {0} from {1} to {2} bytes.",
                                fileToCompress.Name, fileToCompress.Length.ToString(), compressedFileStream.Length.ToString());
                        }
                    }
                }
            }
        }

        public static void Decompress(FileInfo fileToDecompress)
        {
            using (FileStream originalFileStream = fileToDecompress.OpenRead())
            {
                string currentFileName = fileToDecompress.FullName;
                string newFileName = currentFileName.Remove(currentFileName.Length - fileToDecompress.Extension.Length);

                using (FileStream decompressedFileStream = File.Create(newFileName))
                {
                    using (GZipStream decompressionStream = new GZipStream(originalFileStream, CompressionMode.Decompress))
                    {
                        decompressionStream.CopyTo(decompressedFileStream);
                        Console.WriteLine("Decompressed: {0}", fileToDecompress.Name);
                    }
                }
            }
        }
    }
}

Answer 3

以下链接显示了 C# 中文件的压缩和解压缩的两个示例。您可以使用此示例。

示例（使用 7-zip）：

var tmp = new SevenZipCompressor();
tmp.ScanOnlyWritable = true;
tmp.CompressFilesEncrypted(outputFilePath, password, filePaths);

示例（使用 ZipArchive）：

ZipArchive zip = ZipFile.Open(filePath, ZipArchiveMode.Create);
zip.CreateEntryFromFile(file, Path.GetFileName(file), CompressionLevel.Optimal);
zip.Dispose();

更多信息：

http://csharpexamples.com/zip-and-unzip-files-programmatically-in-c/