ASP.NET Web Api 2实现多文件打包并下载文件的实例

using System.Collections.Generic;namespace WebApiDownload.Models{ public class DemoData {  public static readonly List<List<string>> Contacts = new List<List<string>>();  public static readonly List<string> File1 = new List<string>  {   "f_1_test_1@example.com",   "f_1_test_2@example.com",   "f_1_test_3@example.com",   "f_1_test_4@example.com",   "f_1_test_5@example.com"  };  public static readonly List<string> File2 = new List<string>  {   "f_2_test_1@example.com",   "f_2_test_2@example.com",   "f_2_test_3@example.com",   "f_2_test_4@example.com",   "f_2_test_5@example.com"  };  public static readonly List<string> File3 = new List<string>  {   "f_3_test_1@example.com",   "f_3_test_2@example.com",   "f_3_test_3@example.com",   "f_3_test_4@example.com",   "f_3_test_5@example.com"  };  public static List<List<string>> GetMultiple  {   get   {    if (Contacts.Count <= 0)    {     Contacts.Add(File1);     Contacts.Add(File2);     Contacts.Add(File3);    }    return Contacts;   }  } }}

using System.Linq;using System.Net.Http;using System.Text;using System.Web.Http;using Ionic.Zip;using WebApiDownload.Models;using System;using System.IO;using System.Net;using System.Net.Http.Headers;using System.Threading;using System.Web;namespace WebApiDownload.Controllers{ [RoutePrefix("download")] public class DownloadController : ApiController {  [HttpGet, Route("single")]  public HttpResponseMessage DownloadSingle()  {   var response = new HttpResponseMessage();   //从List集合中获取byte[]   var bytes = DemoData.File1.Select(x => x + "/n").SelectMany(x => Encoding.UTF8.GetBytes(x)).ToArray();   try   {    var fileName = string.Format("download_single_{0}.txt", DateTime.Now.ToString("yyyyMMddHHmmss"));    var content = new ByteArrayContent(bytes);    response.Content = content;    response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")    {     FileName = fileName    };    response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");   }   catch (Exception ex)   {    response.StatusCode = HttpStatusCode.InternalServerError;    response.Content = new StringContent(ex.ToString());   }   return response;  }  [HttpGet, Route("zip")]  public HttpResponseMessage DownloadZip()  {   var response = new HttpResponseMessage();   try   {    var zipFileName = string.Format("download_compressed_{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss"));    var downloadDir = HttpContext.Current.Server.MapPath($"~/downloads/download");    var archive = $"{downloadDir}/{zipFileName}";    var temp = HttpContext.Current.Server.MapPath("~/downloads/temp");    // 清空临时文件夹中的所有临时文件    Directory.EnumerateFiles(temp).ToList().ForEach(File.Delete);    ClearDownloadDirectory(downloadDir);    // 生成新的临时文件    var counter = 1;    foreach (var c in DemoData.GetMultiple)    {     var fileName = string.Format("each_file_{0}_{1}.txt", counter, DateTime.Now.ToString("yyyyMMddHHmmss"));     if (c.Count <= 0)     {      continue;     }     var docPath = string.Format("{0}/{1}", temp, fileName);     File.WriteAllLines(docPath, c, Encoding.UTF8);     counter++;    }    Thread.Sleep(500);    using (var zip = new ZipFile())    {     // Make zip file     zip.AddDirectory(temp);     zip.Save(archive);    }    response.Content = new StreamContent(new FileStream(archive, FileMode.Open, FileAccess.Read));    response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") { FileName = zipFileName };    response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");   }   catch (Exception ex)   {    response.StatusCode = HttpStatusCode.InternalServerError;    response.Content = new StringContent(ex.ToString());   }   return response;  }  private void ClearDownloadDirectory(string directory)  {   var files = Directory.GetFiles(directory);   foreach (var file in files)   {    try    {     File.Delete(file);    }    catch    {    }   }  } }}