asp.net webapi 支持文件下载

using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Net;using System.Net.Http;using System.Net.Http.Headers;using System.Web.Http;namespace DownloadFileFromWebApi.Controllers{ [RoutePrefix("download")] public class DownloadController : ApiController {  [Route("get_demo_file")]  public HttpResponseMessage GetFileFromWebApi()  {   try   {    var FilePath = System.Web.Hosting.HostingEnvironment.MapPath(@"~/download/EditPlus64_xp85.com.zip");    var stream = new FileStream(FilePath, FileMode.Open);    HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);    response.Content = new StreamContent(stream);    response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");    response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") {     FileName="Wep Api Demo File.zip"    };    return response;   }   catch   {    return new HttpResponseMessage(HttpStatusCode.NoContent);   }  } }}