C#解压zip有密码文件失败，返回错误信息为entry compreed size 11too small for encrption

[IT格子]

源代码在这里：

using System;
using System.Data;
using System.Web;
using System.Text;
using System.Collections;
using System.IO;
using System.Diagnostics;
using System.Runtime.Serialization.Formatters.Binary;
using ICSharpCode.SharpZipLib.BZip2;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Zip.Compression;
using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
using ICSharpCode.SharpZipLib.GZip;
using ICSharpCode.SharpZipLib.Checksums;
using System.Windows.Forms;

namespace 解压zip
{
    /// <summary>
    /// UnZipFloClass 的摘要说明
    /// </summary>
    public class UnZipFloClass
    {

        public string UnZip(string TargetFile, string fileDir, string Password)
        {
            string rootFile = " ";
            try
            {
                //读取压缩文件(zip文件)，准备解压缩
                ZipInputStream s = new ZipInputStream(File.OpenRead(TargetFile.Trim()));
                s.Password = Password;
                ZipEntry theEntry;
                string path = fileDir;
                //解压出来的文件保存的路径

                string rootDir = " ";
                //根目录下的第一个子文件夹的名称
                while ((theEntry = s.GetNextEntry()) != null)
                {
                    rootDir = Path.GetDirectoryName(theEntry.Name);
                    //得到根目录下的第一级子文件夹的名称
                    if (rootDir.IndexOf("\\") >= 0)
                    {
                        rootDir = rootDir.Substring(0, rootDir.IndexOf("\\") + 1);
                    }
                    string dir = Path.GetDirectoryName(theEntry.Name);
                    //根目录下的第一级子文件夹的下的文件夹的名称
                    string fileName = Path.GetFileName(theEntry.Name);
                    //根目录下的文件名称
                    if (dir != " ")
                    //创建根目录下的子文件夹,不限制级别
                    {
                        if (!Directory.Exists(fileDir + "\\" + dir))
                        {
                            path = fileDir + "\\" + dir;
                            //在指定的路径创建文件夹
                            Directory.CreateDirectory(path);
                        }
                    }
                    else if (dir == " " && fileName != "")
                    //根目录下的文件
                    {
                        path = fileDir;
                        rootFile = fileName;
                    }
                    else if (dir != " " && fileName != "")
                    //根目录下的第一级子文件夹下的文件
                    {
                        if (dir.IndexOf("\\") > 0)
                        //指定文件保存的路径
                        {
                            path = fileDir + "\\" + dir;
                        }
                    }

                    if (dir == rootDir)
                    //判断是不是需要保存在根目录下的文件
                    {
                        path = fileDir + "\\" + rootDir;
                    }

                    //以下为解压缩zip文件的基本步骤
                    //基本思路就是遍历压缩文件里的所有文件，创建一个相同的文件。
                    if (fileName != String.Empty)
                    {
                        FileStream streamWriter = File.Create(path + "\\" + fileName);

                        int size = 2048;
                        byte[] data = new byte[2048];
                        while (true)
                        {
                            size = s.Read(data, 0, data.Length);
                            if (size > 0)
                            {
                                streamWriter.Write(data, 0, size);
                            }
                            else
                            {
                                break;
                            }
                        }

                        streamWriter.Close();
                    }
                }
                s.Close();

                return rootFile;
            }
            catch (Exception ex)
            {
                return "1; " + ex.Message;
            }
        }
    }
}

当运行时解压失败，返回的值为：1：entry compreed size 11too small for encrption
也就是运行了最后这里的catch内的代码，我是想问下这个是什么情况？压缩11太小，无法加密？还是哪里的问题？是因为被压缩的文件太小了吗？那有没有什么好的办法可以解压zip加密码的文件方法呢。多谢各位大神。

[cheng2005]

https://blog.csdn.net/rickykay/article/details/50982241

有通用标准事情，能不用第三方就少用第三方的东西。

[娃都会打酱油了]

        public static void Zip(string zipFilePath, string passWord = null, params string[] files)
        {
            using (var fStream = File.Create(zipFilePath))
            {
                using (var zoStream = new ZipOutputStream(fStream))
                {
                    if (!string.IsNullOrWhiteSpace(passWord))
                    {
                        zoStream.Password = passWord;
                    }
                    var buffer = new byte[4096];
                    foreach (var file in files)
                    {
                        var entry = new ZipEntry(Path.GetFileName(file));
                        zoStream.PutNextEntry(entry);
                        using (var fs = File.OpenRead(file))
                        {
                            int sourceBytes;
                            do
                            {
                                sourceBytes = fs.Read(buffer, 0, buffer.Length);
                                zoStream.Write(buffer, 0, sourceBytes);
                            } while (sourceBytes > 0);
                        }
                    }
                    zoStream.Finish();
                }
            }
        }

        public static IList<string> UnZip(string zipFilePath, string unZipDirectory, string passWord = null)
        {
            IList<string> list = new List<string>();
            using (var ziStream = new ZipInputStream(File.OpenRead(zipFilePath)))
            {
                if (!string.IsNullOrWhiteSpace(passWord))
                {
                    ziStream.Password = passWord;
                }
                ZipEntry theEntry;
                while ((theEntry = ziStream.GetNextEntry()) != null)
                {
                    if (!Directory.Exists(unZipDirectory))
                    {
                        Directory.CreateDirectory(unZipDirectory);
                    }
                    string path = Path.Combine(unZipDirectory, theEntry.Name);
                    using (var streamWriter = File.Create(path))
                    {
                        list.Add(path);
                        var data = new byte[2048];
                        while (true)
                        {
                            var size = ziStream.Read(data, 0, data.Length);
                            if (size > 0)
                            {
                                streamWriter.Write(data, 0, size);
                            }
                            else
                            {
                                break;
                            }
                        }
                    }
                }
            }
            return list;
        }