压缩文件的使用
首先引入dll文件ICSharpCode.SharpZipLib.dll 管理NuGet包里面下载
压缩文件
1 /// <summary> 2 /// 压缩文件 3 /// </summary> 4 /// <param name="fileName">要压缩的所有文件（完全路径)</param> 5 /// <param name="fileName">文件名称</param> 6 /// <param name="name">压缩后文件路径</param> 7 /// <param name="Level">压缩级别</param> 8 public void ZipFileMain(string[] filenames, string[] fileName, string name, int Level) 9 { 10 ZipOutputStream s = new ZipOutputStream(File.Create(name)); 11 Crc32 crc = new Crc32(); 12 //压缩级别 13 s.SetLevel(Level); // 0 - store only to 9 - means best compression 14 try 15 { 16 int m = 0; 17 foreach (string file in filenames) 18 { 19 //打开压缩文件 20 FileStream fs = File.OpenRead(file);//文件地址 21 byte[] buffer = new byte[fs.Length]; 22 fs.Read(buffer, 0, buffer.Length); 23 //建立压缩实体 24 ZipEntry entry = new ZipEntry(fileName[m].ToString());//原文件名 25 //时间 26 entry.DateTime = DateTime.Now; 27 //空间大小 28 entry.Size = fs.Length; 29 fs.Close(); 30 crc.Reset(); 31 crc.Update(buffer); 32 entry.Crc = crc.Value; 33 s.PutNextEntry(entry); 34 s.Write(buffer, 0, buffer.Length); 35 m++; 36 } 37 } 38 catch 39 { 40 throw; 41 } 42 finally 43 { 44 s.Finish(); 45 s.Close(); 46 } 47 }
文件下载
1 //下载打包文件 2 private void DownloadFile(string fileName, string filePath) 3 { 4 FileInfo fileInfo = new FileInfo(filePath); 5 Response.Clear(); 6 Response.ClearContent(); 7 Response.ClearHeaders(); 8 Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName); 9 Response.AddHeader("Content-Length", fileInfo.Length.ToString()); 10 Response.AddHeader("Content-Transfer-Encoding", "binary"); 11 Response.ContentType = "application/octet-stream"; 12 Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312"); 13 Response.WriteFile(fileInfo.FullName); 14 Response.Flush(); 15 File.Delete(filePath);//删除已下载文件 16 Response.End(); 17 }
具体使用
1 protected void BtnDownloadFiles_Click(object sender, EventArgs e) 2 { 3 List<string> listFJ = new List<string>();//保存附件路径 4 List<string> listFJName = new List<string>();//保存附件名字 5 for (int i = 0; i < gridView.Rows.Count; i++) 6 { 7 HtmlInputCheckBox chk = (Page.Master.FindControl("ContentPlaceHolder1").FindControl("gridView") as GridView).Rows[i].FindControl("checkboxname") as HtmlInputCheckBox; 8 if (chk != null && chk.Checked) 9 { 10 string temp = gridView.Rows[i].Cells[14].Text.ToString().Trim(); 11 if (temp != " ") 12 { 13 listFJ.Add(Server.MapPath("~") + temp); 14 listFJName.Add(temp); 15 } 16 } 17 } 18 string time = DateTime.Now.Ticks.ToString(); 19 ZipFileMain(listFJ.ToArray(), listFJName.ToArray(), Server.MapPath("~/uploadfiles/" + time + ".zip"), 9);//压缩文件 20 DownloadFile(Server.UrlEncode("附件.zip"), Server.MapPath("~/uploadfiles/" + time + ".zip"));//下载文件 21 }
