从HttpResponseMessage获取Excel文件

我正在做一个ASP.NET Core 2.2项目，我需要用我的浏览器下载我的Excel，但是当我正在做我的请求时，我只是得到一些Json。

我的Excel在stream中，stream不是空的！

这是我的代码：

HttpResponseMessage message = new HttpResponseMessage(HttpStatusCode.OK); var streamContent = new StreamContent(stream); streamContent.Headers.ContentType = new MediaTypeHeaderValue("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); streamContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment"); streamContent.Headers.ContentDisposition.FileName = "Excel.xlsx"; message.Content = streamContent; return message; 

这里是我得到的回应：

 {"version":{"major":1,"minor":1,"build":-1,"revision":-1,"majorRevision":-1,"minorRevision":-1},"content":{"headers":[{"key":"Content-Type","value":["application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"]},{"key":"Content-Disposition","value":["attachment; filename=Excel.xlsx"]}]},"statusCode":200,"reasonPhrase":"OK","headers":[],"requestMessage":null,"isSuccessStatusCode":true} 

那么，有人知道我可以用HttpResponseMessage发送我的Excel文件吗？

我可以使用Filesteam下载我的Excel文件，但我不想用这种方式，因为我不能得到任何HTTP错误消息（错误的请求，内部等）但是如果有人知道我可以如何发送消息返回Filestream，我会很高兴看到你的build议！

编辑：这是当我返回一个FileStreamResult的代码

  return File(stream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); 

Answer 1

您可以从Stream读取Byte数组，然后返回FileContentResult。

 using System.Net.Http; using System.Threading.Tasks; using Microsoft.AspNetCore.Mvc; namespace DemoWebCore.Controllers { [Route("api/[controller]")] public class FilesController : Controller { // GET api/files/sample.png [HttpGet("{fileName}")] public async Task<ActionResult> Get(string fileName) { var cd = new System.Net.Http.Headers.ContentDispositionHeaderValue("inline") { FileName = "Excel.xlsx" }; Response.Headers.Add("Content-Disposition", cd.ToString()); StreamContent stream = YOUR_STREAM_SOURCE byte[] content = await stream.ReadAsByteArrayAsync(); return File(content, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); } } } 

Answer 2

  async Task<bool> DownloadDocument(string authorizationToken, string fileName) { try { string url = "yoururl": using (var httpClient = new HttpClient()) { httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", authorizationToken); HttpResponseMessage response = await httpClient.GetAsync(url); await ReadAsFileAsync(response.Content, fileName, true); return true; } } catch (Exception ex) { Response.Write(ex.Message); return false; }