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。
简单的压缩解压也可以用GZipStream
using (FileStream intputStream = new FileStream("D:\\test.txt", FileMode.OpenOrCreate)) { using (FileStream outputStream = new FileStream("D:\\test.zip", FileMode.OpenOrCreate, FileAccess.Write)) { using (GZipStream zipStream = new GZipStream(outputStream, CompressionMode.Compress)) { byte[] byts = new byte[1024]; int len = 0; while((len= intputStream.Read(byts,0,byts.Length))>0) { zipStream.Write(byts, 0, byts.Length); } } } }下载源码：https://pan.baidu.com/s/1jIBT73C
