Question

我想压缩包含二进制数据的文件，并将压缩数据保存在另一个文件中：

FileStream fileStream = new FileStream("compressed_file.bin", FileMode.Create, FileAccess.Write);
GZipStream compressionStream = new GZipStream(fileStream, CompressionMode.Compress);
StreamWriter writer = new StreamWriter(compressionStream);
writer.Write(File.ReadAllBytes("file_to_be_compressed.bin"), 0, File.ReadAllBytes("file_to_be_compressed.bin").Length);
writer.Close();

我收到以下错误：

无法从'byte []'转换为'char []'

排队：

writer.Write(File.ReadAllBytes("file_to_be_compressed.bin"), 0, File.ReadAllBytes("file_to_be_compressed.bin").Length)

将文件的二进制数据转换为字节数组是否合适，或者将文件的二进制数据作为流传递更好？

注意：CopyTo在.NET 2.0中不可用

Answer 1

根据http://www.dotnetperls.com/gzipstream

尝试此操作

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

class Program
{
    static void Main()
    {
    try
    {
        // 1.
        // Starting file is 26,747 bytes.
        string anyString = File.ReadAllText("TextFile1.txt");

        // 2.
        // Output file is 7,388 bytes.
        CompressStringToFile("new.gz", anyString);
    }
    catch
    {
        // Could not compress.
    }
    }

    public static void CompressStringToFile(string fileName, string value)
    {
    // A.
    // Write string to temporary file.
    string temp = Path.GetTempFileName();
    File.WriteAllText(temp, value);

    // B.
    // Read file into byte array buffer.
    byte[] b;
    using (FileStream f = new FileStream(temp, FileMode.Open))
    {
        b = new byte[f.Length];
        f.Read(b, 0, (int)f.Length);
    }

    // C.
    // Use GZipStream to write compressed bytes to target file.
    using (FileStream f2 = new FileStream(fileName, FileMode.Create))
    using (GZipStream gz = new GZipStream(f2, CompressionMode.Compress, false))
    {
        gz.Write(b, 0, b.Length);
    }
    }
}

如何在.NET 2.0中使用C＃中的GZipStream压缩文件

1 个答案: