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);
}
}
}
}