提取zip文件并覆盖（在同一目录中-C＃）

尝试这样的事情。远离我的开发箱，所以这可能需要一些调整，只需从内存中写入即可。

编辑：如前所述，您可以使用具有覆盖选项的ExtractToFile。ExtractToDirectory没有。

本质上，您将其解压缩到一个临时文件夹，然后检查目标文件夹中是否已存在解压缩文件的名称。如果是这样，它将删除现有文件，并将新解压缩的文件移动到目标文件夹。

    try
    {
        string zipPath = (Directory.GetCurrentDirectory() + "\\" + "my_zip");
        Console.WriteLine("Zip's path: " + zipPath);
        //Declare a temporary path to unzip your files
        string tempPath = Path.Combine(Directory.GetCurrentDirectory(), "tempUnzip");
        string extractPath = Directory.GetCurrentDirectory();
        ZipFile.ExtractToDirectory(zipPath, tempPath);

        //build an array of the unzipped files
        string[] files = Directory.GetFiles(tempPath);

        foreach (string file in files)
        {
            FileInfo f = new FileInfo(file);
            //Check if the file exists already, if so delete it and then move the new file to the extract folder
            if (File.Exists(Path.Combine(extractPath,f.Name)))
            {
                File.Delete(Path.Combine(extractPath, f.Name));
                File.Move(f.FullName, Path.Combine(extractPath, f.Name));
            }
            else
            {
                File.Move(f.FullName, Path.Combine(extractPath, f.Name));
            }
        }
        //Delete the temporary directory.
        Directory.Delete(tempPath);
        return (0); // 0 all fine 
    }
    catch (Exception)
    {
        return (1); // 1 = extract error
    }

编辑，如果目录解压缩（再次，可能需要调整，我没有测试过）：

        try
        {
            string zipPath = (Directory.GetCurrentDirectory() + "\\" + "my_zip");
            Console.WriteLine("Zip's path: " + zipPath);
            //Declare a temporary path to unzip your files
            string tempPath = Path.Combine(Directory.GetCurrentDirectory(), "tempUnzip");
            string extractPath = Directory.GetCurrentDirectory();
            ZipFile.ExtractToDirectory(zipPath, tempPath);

            //build an array of the unzipped directories:
            string[] folders = Directory.GetDirectories(tempPath);

            foreach (string folder in folders)
            {
                DirectoryInfo d = new DirectoryInfo(folder);
                //If the directory doesn't already exist in the destination folder, move it to the destination.
                if (!Directory.Exists(Path.Combine(extractPath,d.Name)))
                {
                    Directory.Move(d.FullName, Path.Combine(extractPath, d.Name));
                    continue;
                }
                //If directory does exist, iterate through the files updating duplicates.
                else
                {
                    string[] subFiles = Directory.GetFiles(d.FullName);
                    foreach (string subFile in subFiles)
                    {
                        FileInfo f = new FileInfo(subFile);
                        //Check if the file exists already, if so delete it and then move the new file to the extract folder
                        if (File.Exists(Path.Combine(extractPath, d.Name, f.Name)))
                        {
                            File.Delete(Path.Combine(extractPath, d.Name, f.Name));
                            File.Move(f.FullName, Path.Combine(extractPath, d.Name, f.Name));
                        }
                        else
                        {
                            File.Move(f.FullName, Path.Combine(extractPath, d.Name, f.Name));
                        }
                    }
                }
            }

            //build an array of the unzipped files in the parent directory
            string[] files = Directory.GetFiles(tempPath);

            foreach (string file in files)
            {
                FileInfo f = new FileInfo(file);
                //Check if the file exists already, if so delete it and then move the new file to the extract folder
                if (File.Exists(Path.Combine(extractPath,f.Name)))
                {
                    File.Delete(Path.Combine(extractPath, f.Name));
                    File.Move(f.FullName, Path.Combine(extractPath, f.Name));
                }
                else
                {
                    File.Move(f.FullName, Path.Combine(extractPath, f.Name));
                }
            }
            Directory.Delete(tempPath);
            return (0); // 0 all fine 
        }