C#压缩解压(可任意选择多个文件夹，文件一起压缩)；BackgroundWorker配合进度条的使用

如，下图操作，任意选择要压缩的文件夹，文件，设置压缩后保存的文件，点压缩按钮

执行效果如下

执行完的test1.zip

压缩需要引用using ICSharpCode.SharpZipLib.Zip;
可在http://www.icsharpcode.net/opensource/sharpziplib/Default.aspx下载

首先看BackgroundWorker初始化的代码

        BackgroundWorker worker = new BackgroundWorker();        public Form1()        {            InitializeComponent();            worker.WorkerSupportsCancellation = true;//是否支持异步取消            worker.WorkerReportsProgress = true;//能否报告进度更新            worker.DoWork += Worker_DoWork;        }

在压缩按钮的代码里主要是worker.RunWorkerAsync()和show进度条窗体

        private void compression_Click(object sender, EventArgs e)        {            value = 0;//进度条的值            worker.RunWorkerAsync("compression");//会触发worker的DoWork事件            ProgressFrom progress = new ProgressFrom(worker);//将worker给progress窗体            progress.ShowDialog(this);        }

worker.RunWorkerAsync()会执行Worker_DoWork方法，压缩和解压都是BackgroundWorker在后台执行

        private void Worker_DoWork(object sender, DoWorkEventArgs e)        {            if (e.Argument.ToString()== "compression")            {                                try                {                    //Create Zip File                    ZipOutputStream zipStream = null;                    using (zipStream = new ZipOutputStream(File.Create(textBox1.Text)))                    {                        zipStream.Password = "123";//压缩密码                        zipStream.SetComment("版本1.0");//压缩文件描述                        zipStream.SetLevel(6); //设置CompressionLevel，压缩比                        foreach (string f in listBox1.Items)                        {                            ZipMultiFiles(f, zipStream);//压缩                        }                                         }                }                catch (Exception ex)                {                    MessageBox.Show("压缩失败" + "\r\n" + ex.Message);                }                finally                {                    worker.CancelAsync();      //取消后台操作                                          }            }            else            {                try                {                    ZipInputStream zipStream = null;                    foreach (string f in listBox1.Items)                    {                        if (File.Exists(f))                        {                            using (zipStream = new ZipInputStream(File.OpenRead(f)))                            {                                zipStream.Password = "123";                                UnZipMultiFiles(f, zipStream,textBox2.Text);                            }                        }                    }                                  }                catch(Exception ex)                {                    MessageBox.Show("解压失败" + "\r\n" + ex.Message);                }                finally                {                    worker.CancelAsync();                }            }        }

压缩ZipMultiFiles方法如下

        private void ZipMultiFiles(string file, ZipOutputStream zipStream, string lastName = "")        {            FileStream streamReader = null;            if (File.Exists(file))      //是文件，压缩              {                using (streamReader = File.OpenRead(file))                {                    //处理file,如果不处理，直接new ZipEntry(file)的话,压缩出来是全路径                    //如C:\Users\RD\Desktop\image\001.xml，压缩包里就是C:\Users\RD\Desktop\image\001.xml                    //如果处理为image\001.xml压缩出来就是image\001.xml（这样才跟用工具压缩的是一样的效果）                    string path = Path.GetFileName(file);                    if (lastName != "")                    {                        path = lastName + "\\" + path;                    }                    ZipEntry zipEntry = new ZipEntry(path);                    zipEntry.DateTime = DateTime.Now;                    zipEntry.Size = streamReader.Length;                    zipStream.PutNextEntry(zipEntry);//压入                    int sourceCount = 0;                    byte[] buffer = new byte[4096 * 1024];                    while ((sourceCount = streamReader.Read(buffer, 0, buffer.Length)) > 0)                    {                        zipStream.Write(buffer, 0, sourceCount);                        if (worker.WorkerReportsProgress)                        {                            if (value == 100)//因为不知道要压缩的总量有多大，所以这里简陋的让进度条从0-100循环                            {                                value = 0;                            }                            value += 1;                            worker.ReportProgress(value);//报告进度，在progress窗体里响应                        }                        if (worker != null && worker.IsBusy)                        {                            if (worker.CancellationPending)                            {                                // update the entry size to avoid the ZipStream exception                                zipEntry.Size = streamReader.Position;                                break;                            }                        }                    }                    if (worker.WorkerReportsProgress)                    {                        worker.ReportProgress(value, file);                    }                    if (worker != null && worker.CancellationPending)                    {                        return;                    }                }            }            else//是文件夹，递归            {                string[] filesArray = Directory.GetFileSystemEntries(file);                string folderName = Regex.Match(file, @"[^\/:*\?\”“\<>|,\\]*$").ToString();//获取最里一层文件夹                if (lastName != "")                {                    folderName = lastName + "\\" + folderName;                }                if (filesArray.Length == 0)//如果是空文件夹                {                    ZipEntry zipEntry = new ZipEntry(folderName + "/");//加/才会当作文件夹来压缩                    zipStream.PutNextEntry(zipEntry);                }                foreach (string f in filesArray)                {                    ZipMultiFiles(f, zipStream, folderName);                }            }        }

这里再给出进度条窗体的代码,这里响应了ZipMultiFiles的worker.ReportProgress()，所以能看到开始给的图中效果

     public partial class ProgressFrom : Form    {        private BackgroundWorker backgroundWorker;        public ProgressFrom(BackgroundWorker worker)        {            InitializeComponent();            backgroundWorker = worker;            backgroundWorker.ProgressChanged += BackgroundWorker_ProgressChanged;//响应 worker.ReportProgress()；            backgroundWorker.RunWorkerCompleted += BackgroundWorker_RunWorkerCompleted;//响应worker.CancelAsync();        }        private void BackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)        {            this.Close();        }        private void BackgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)        {            progressBar1.Value = e.ProgressPercentage;// e.ProgressPercentage接收ReportProgress的第一个参数            if (e.UserState!=null)            {                string message = e.UserState.ToString() + "压缩完成\r\n";// e.UserState.ToString()接收ReportProgress的第二个参数                textBox1.AppendText(message);            }                   }    }

解压的方法UnZipMultiFiles为

 private void UnZipMultiFiles(string file, ZipInputStream zipStream,string unzippath)        {            ZipEntry theEntry;            while ((theEntry = zipStream.GetNextEntry()) != null)            {                string fileName=Path.GetFileNameWithoutExtension(file);                string entryName = theEntry.Name.Replace(":", "_");//如果路径里有盘符 如C: 解压后应为名为C_的文件夹来代表盘符                string directoryName =Path.Combine( unzippath , fileName,entryName );                //建立下面的目录和子目录                  if (!Directory.Exists(Path.GetDirectoryName(directoryName)))                {                    Directory.CreateDirectory(Path.GetDirectoryName(directoryName));                }                string name =directoryName.Replace('/', '\\');//如果为空文件                if (name.EndsWith("\\"))                {                    continue;                }                using (FileStream streamWriter = File.Create(directoryName))                {                    int sourceCount = 0;                    byte[] buffer = new byte[4096 * 1024];                    while ((sourceCount = zipStream.Read(buffer, 0, buffer.Length)) > 0)                    {                        streamWriter.Write(buffer, 0, sourceCount);                        if (worker.WorkerReportsProgress)                        {                            if (value == 100)                            {                                value = 0;                            }                            value += 1;                            worker.ReportProgress(value);                        }                        if (worker != null && worker.IsBusy)                        {                            if (worker.CancellationPending)                            {                                break;                            }                        }                    }                }            }        }

这里主要想试验压缩和BackgroundWorker，所有很多细节没有完善处理。

下载源码：https://pan.baidu.com/s/1jIBT73C