1 #region 获取FTP服务器上指定文件的大小 2 /// <summary> 3 /// 获取FTP服务器上指定文件的大小 4 /// </summary> 5 /// <param name="fileName">FTP服务器上的文件名</param> 6 /// <returns></returns> 7 private int GetFtpFileSize(string fileName) 8 { 9 FtpWebRequest reqFTP; 10 int fileSize = 0; 11 try 12 { 13 reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://211.149.150.137/feibiht/upLoad/rar/" + fileName)); 14 15 reqFTP.Credentials = new NetworkCredential("Administrator", "02887140168"); 16 17 reqFTP.Method = WebRequestMethods.Ftp.GetFileSize; 18 19 reqFTP.UseBinary = true; 20 FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); 21 Stream ftpStream = response.GetResponseStream(); 22 fileSize = (int)response.ContentLength; 23 24 ftpStream.Close(); 25 response.Close(); 26 } 27 catch (Exception ex) 28 { 29 MessageBox.Show(ex.Message); 30 } 31 return fileSize; 32 } 33 #endregion 34 35 36 #region FTP下载带进度条 37 /// <summary> 38 /// FTP下载带进度条 39 /// </summary> 40 /// <param name="filePath">下载到客户端的地址</param> 41 /// <param name="fileName">FTP上对应的文件名</param> 42 /// <returns></returns> 43 private bool FtpDownload(string filePath, string fileName) 44 { 45 46 FtpWebRequest reqFTP; 47 try 48 { 49 //打开一个文件流 (System.IO.FileStream) 去读要下载的文件 50 FileStream outputStream = new FileStream(filePath + "\" + fileName, FileMode.Create); 51 52 reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://211.149.150.137/feibiht/upLoad/rar/" + fileName)); 53 // ftp用户名和密码 54 reqFTP.Credentials = new NetworkCredential("Administrator", "02887140168"); 55 // 指定执行什么命令 56 reqFTP.Method = WebRequestMethods.Ftp.DownloadFile; 57 // 指定数据传输类型 58 reqFTP.UseBinary = true; 59 60 FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); 61 62 Stream ftpStream = response.GetResponseStream(); 63 //这里其实娶不到FTP上该文件的大小，应另写方法来获取(WebRequestMethods.Ftp.GetFileSize) 64 //long cl = response.ContentLength; 65 // 缓冲大小设置为2kb 66 int bufferSize = 8192;// 4096;// 2048; //局域网内可以放大点 67 68 int readCount; 69 70 byte[] buffer = new byte[bufferSize]; 71 72 readCount = ftpStream.Read(buffer, 0, bufferSize); 73 //FTP上文件的大小 74 int allbye = this.GetFtpFileSize(fileName); 75 int startbye = 0; 76 this.prcBar.Maximum = allbye; 77 this.prcBar.Minimum = 0; 78 this.prcBar.Visible = true; 79 this.label1.Visible = true; 80 // 流内容没有结束 81 while (readCount > 0) 82 { 83 // 把内容从file stream 写入 DownLoadStream 84 outputStream.Write(buffer, 0, readCount); 85 86 readCount = ftpStream.Read(buffer, 0, bufferSize); 87 // 88 startbye += readCount; 89 this.label1.Text = "已下载:" + (int)(startbye / 1024) + "KB/" + "总长度:" + (int)(allbye / 1024) + "KB" + " " + " 文件名:" + fileName; 90 prcBar.Value = startbye; 91 Application.DoEvents(); 92 Thread.Sleep(5); 93 } 94 //this.prcBar.Visible = false; 95 this.Visible = false; 96 MessageBox.Show("文件下载成功！！！","提示"); 97 //this.label1.Text = "下载成功!"; 98 ftpStream.Close(); 99 outputStream.Close(); 100 response.Close(); 101 return true; 102 103 } 104 catch (Exception ex) 105 { 106 MessageBox.Show(ex.Message); 107 return false; 108 } 109 finally 110 { 111 } 112 } 113 #endregion