Zip文件的下载

 

C# https://learn.microsoft.com/zh-cn/dotnet/api/system.io.compression.zipfile?view=net-7.0

（1）生成压缩文件，返回文件流给前端

 1 public static byte[] ZipFiles(List<FileModel> filePathList, string zipDir)
 2 {
 3     string zipPath = $"{zipDir}.zip";
 4     if (File.Exists(zipDir))
 5     {
 6         Directory.Delete(zipDir);
 7     }
 8     if (File.Exists(zipPath))
 9     {
10         File.Delete(zipPath);
11     }
12 
13     Directory.CreateDirectory(zipDir);
14     ZipFile.CreateFromDirectory(zipDir, zipPath);
15 
16     using (FileStream zipToOpen = new FileStream(zipPath, FileMode.Open))
17     {
18         using (ZipArchive archive = new ZipArchive(zipToOpen, ZipArchiveMode.Update))
19         {
20             foreach (FileModel file in filePathList)
21             {
22                 archive.CreateEntryFromFile(file.FileUrl, file.FileName);
23             }
24         }
25     }
26 
27     var buffer = File.ReadAllBytes(zipPath);
28 
29     Directory.Delete(zipDir);
30     File.Delete(zipPath);
31     return buffer;
32 }
第一种方式生成Zip文件
 1  
 2 //安装包 DotNetZip 可以给文件加密
 3 using Ionic.Zip;
 4 
 5 using (ZipFile zip = new ZipFile())
 6   {
 7     var addFile = @"44.jpg";
 8     zip.AddFile(addFile, "4455.jpg"); // no password for this one
 9     zip.Password= "123456!";
10     zip.AddFile("7440-N49th.png");
11     zip.Password= "!Secret1";
12     zip.AddFile("2005_Annual_Report.pdf");
13 
14     zip.Save("Backup.zip");
15   }
第二种方式生成Zip文件

 

1 [HttpGet("download")]
2 public async Task<ActionResult> DownloadFileAsync(long? fileId)
3 {
4 var buffer = await _fileManager.DownloadFileAsync(ticketId);
5 return new FileContentResult(buffer, "application/octet-stream");
6 }
View Code

（2）前端接收文件流

 1  import { downloadZip } from "@/assets/js/utils";
 2 downloadTicketFiles(id){
 3       this.$axios.get(`/api/ticketFile/download?ticketId=${id}`,{ responseType: "blob"}).then(res => {
 4         if(res.data && res.data.length == 0){
 5           this.$message.warning('没有附件可以下载');
 6           return false;
 7         }
 8         downloadZip(res.data, 'TicketFiles.zip');
 9         
10       });
11     }
12 
13  //封装的utils.js代码
14  export function downloadZip(data, name = '下载.zip') {
15     let blob = new Blob([data], { type: 'application/zip;charset=UTF-8' });
16     let url = window.URL.createObjectURL(blob);
17     let aLink = document.createElement('a');
18     aLink.style.display = 'none';
19     aLink.setAttribute('href', url);
20     aLink.setAttribute('download', name);
21     document.body.appendChild(aLink);
22     aLink.click();
23     document.body.removeChild(aLink);
24     window.URL.revokeObjectURL(url);
25   }
View Code

 

如果下载其他的文件，比如Excel把type 更换  type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8'

 csv         type: 'application/csv;charset=UTF-8'
 html        type: 'application/html;charset=UTF-8'

posted @ 2023-11-10 17:03  小黄鸭  阅读(102)  评论(0)    收藏  举报