我是先从服务器下载zip压缩包，然后解压。

解压出错了，经过调试我发现原因所在。如果不下载，zip压缩包直接放在目录下解压是没问题。如果下载这个zip，然后再用这个zip就有问题，但是文件流已经关闭，不知道问题所在。我做了一个实验，打断点调试。等文件下载完后，马上进入断点，然后我把服务器上的文件拷贝下来，覆盖我这个已经下载的文件，这样再执行下面的解压代码就没问题，所以我才怀疑是不是文件资源被占用了，可是我已经关闭了文件流了，求解。

代码如下

方法：

 /// <summary>         /// 下载         /// </summary>         /// <param name="url">下载的url</param>         /// <param name="savefilepath">文件保存的目录</param>         /// <param name="pro">需要重启的程序</param>         private void LoadZIP(string url, string savefilepath, string pro)         {

            System.Security.Policy.Url Url = new System.Security.Policy.Url(url);             System.Net.HttpWebRequest Request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(Url.Value);             long fileSizeAll = Request.GetResponse().ContentLength;             Request.Abort();             byte[] buffer = new byte[1024];         // 接收缓冲区                        int readSize = 0;                      // 接收字节数              int AllReadSize = 0;             System.IO.FileStream fs = new System.IO.FileStream(savefilepath, System.IO.FileMode.Create);             System.IO.Stream ns = null;

            try             {                 System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(Url.Value);                 ns = request.GetResponse().GetResponseStream();                 readSize = ns.Read(buffer, 0, 1024);                 int index = 0;                 int step = 0;                 this.txttotal.Text = fileSizeAll.ToString();

                while (readSize > 0)                 {                     index++;                     AllReadSize += readSize;                     fs.Write(buffer, 0, readSize);                     readSize = ns.Read(buffer, 0, 1024);

                    this.txtaccept.Text = AllReadSize.ToString();                     if (fileSizeAll > 1024)                     {                         int cs = (int)fileSizeAll / 1024;                         if (cs > 100)                         {                             step = cs / 100;                             if (step == index)                             {                                 if (pro_load.InvokeRequired)                                 {                                     this.Invoke(new Action<int>((x1) =>                                     {                                         pro_load.Value += step;                                     }), step);                                 }                                 else                                 {                                     pro_load.Value += step;                                 }                             }                             else                             {                                 index++;                             }                         }                         else                         {                             step = 100 / cs;                             if (pro_load.InvokeRequired)                             {                                 this.Invoke(new Action<int>((x1) =>                                 {                                     pro_load.Value += 1;                                 }), step);                             }                             else                             {                                 pro_load.Value += 1;                             }

                        }

                    }                 }                 if (pro_load.Value < 100)                 {                     pro_load.Value = 100;                 }                 fs.Close();                 fs.Dispose();                 ns.Close();                 ns.Dispose();                 toolStripStatusLabel2.Text = "正在解压. . .";                 System.Threading.Thread.Sleep(1000);                 pro_ExtractZip.Value = 50;                 ExtractZip(savefilepath, Application.StartupPath+@"\");                 pro_ExtractZip.Value = 100;                 toolStripStatusLabel2.Text = "更新完毕";                 if (System.IO.File.Exists(savefilepath))                 {                     System.IO.File.Delete(savefilepath);                 }                 System.Diagnostics.Process.Start(pro);                 Application.Exit();             }             catch (Exception er)             {                 MessageBox.Show(er.Message);                            }         }

        /// <summary>         /// 压缩文件         /// </summary>         /// <param name="zip">要解压的ZIP文件</param>         /// <param name="path">要解压到那个目录</param>         private void ExtractZip(string zippath, string path)         {             (new ICSharpCode.SharpZipLib.Zip.FastZip()).ExtractZip(zippath.ToString(), path.ToString(), "");         }

方法的调用：

 private void Mian_Load(object sender, EventArgs e)         {              //bool result = false;             //ExtractZip(@"D:\C#工程\WinUpdate\UpdateClient\bin\Debug\YPH1308002548.zip", @"D:\C#工程\WinUpdate\UpdateClient\bin\Debug\");             try             {                                up.UpdateServerSoapClient client = new UpdateClient.up.UpdateServerSoapClient();

                string str = client.Getfile(System.Configuration.ConfigurationManager.AppSettings["DirectoryName"]);                 if (str != string.Empty)                 {                     string[] file = str.Split(',');                     if (file.Length == 2)                     {                         string md5 = UpdateClient.Properties.Settings.Default.MD5.ToString().Trim();                         if (file[1] != md5)                         {                             if (DialogResult.OK == MessageBox.Show("确定要更新到最新程序？", "程序升级", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1))                             {                                 this.Visible = true;                                 string proname = System.Configuration.ConfigurationManager.AppSettings["ProcessName"];                                 foreach (System.Diagnostics.Process p in System.Diagnostics.Process.GetProcesses())                                 {                                                                         if (p.ProcessName.ToUpper().Equals(proname) || p.ProcessName.ToUpper().Equals(proname.Substring(0,proname.Length-4))) //这里不要后缀名                                                            p.Kill();                                 }                                 string url = System.Configuration.ConfigurationManager.AppSettings["URL"];                                 if (url.Substring(url.Length - 1, 1) != "/") url += "/";                                 url += file[0];                                 LoadZIP(System.Configuration.ConfigurationManager.AppSettings["URL"], Application.StartupPath + @"\"+file[0], Application.StartupPath + @"\" + proname);                                 UpdateClient.Properties.Settings.Default.MD5 = md5;                                 UpdateClient.Properties.Settings.Default.Save();                             }                         }                     }

                }                            }             catch(Exception ex)             {                 //错误日志                                Application.Exit();             }             Application.Exit();

        }

错误就在： (new ICSharpCode.SharpZipLib.Zip.FastZip()).ExtractZip(zippath.ToString(), path.ToString(), "");

文件路劲对的哦