如何在 C# 中读取 .DAT 文件

Question

我有一个 .DAT 文件，如果我在记事本中以文本形式打开它会给我像 #¨¤³¦+eäÌIóÆ‹,j° 这样的值。我从一台机器上得到这个文件，我有一个文档可以手动打开这个文件。按照那个

1. Rename each file extensions of TAXA files from .DAT to .GZ
2. Uncompress (or unzip) all TAXAxxxx.GZ (you can use ZIP)
3. After the file extractions, rename each file with file extensions as TAXAxxxx.TXT

这是我尝试过的代码..

        string str = "";
        BinaryReader br = new BinaryReader(File.OpenRead(@"F:\TAXAZ.DAT"));
        foreach (char ch in br.ReadChars(5000))
        str += ch;
        br.Dispose();

这是按照上面提到的说明手动发生的，但是当我尝试以编程方式进行时，它没有发生。我尝试了压缩和解压缩概念，但它是徒劳的。后来我尝试读取二进制文件，然后转换为string 但那也没用。 请帮助我将此文件作为文本阅读。 谢谢..

Answer 1

您的说明说您必须将 .dat 重命名为 .gz，解压缩，然后读取文件。 您的代码正在跳过前两个步骤，只是尝试读取文件。这就是它不起作用的原因。

您可以在 C# 中执行此操作，但您需要对其进行解压缩。您可以使用System.IO.Compression.GZipStream 来执行此操作。

来自该链接的示例 C# 代码：

using System;
using System.IO;
using System.IO.Compression;

namespace zip
{
    public class Program
    {
        private static string directoryPath = @"c:\temp";
        public static void Main()
        {
            DirectoryInfo directorySelected = new DirectoryInfo(directoryPath);
            Compress(directorySelected);

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

        public static void Compress(DirectoryInfo directorySelected)
        {
            foreach (FileInfo fileToCompress in directorySelected.GetFiles())
            {
                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);

                            }
                        }
                        FileInfo info = new FileInfo(directoryPath + "\\" + fileToCompress.Name + ".gz");
                        Console.WriteLine("Compressed {0} from {1} to {2} bytes.",
                        fileToCompress.Name, fileToCompress.Length.ToString(), info.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);
                    }
                }
            }
        }
    }
}