如何从Web API控制器返回文件? [英] How to return a file from web api controller?

问题描述

我正在使用MVC 5 Web Api控制器，并且我想返回一个文件:

I'm using a MVC 5 web Api Controller, and I want to return a file:

[Route("")]
public HttpResponseMessage GetFile()
{
    var statusCode = HttpStatusCode.OK;
    FileStream file = XLGeneration.XLGeneration.getXLFileExigence();

    return Request.CreateResponse(statusCode, file);
}

它不起作用.

邮递员的例外是:

"ExceptionMessage":'ObjectContent`1'类型未能序列化内容类型为'application/json; charset = utf-8'的响应主体."

"ExceptionMessage": "The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8'."

推荐答案

在其他人遇到麻烦的情况下，我正在发布对我有用的替代方法.

I'm posting what worked for me as an alternative in case anybody else is having trouble.

[ActionName("File")]
[HttpGet]
public HttpResponseMessage File()
{
        var response = new HttpResponseMessage(HttpStatusCode.OK);
        var stream = new System.IO.FileStream(yourFilePath, System.IO.FileMode.Open);
        response.Content = new StreamContent(stream);
        response.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/octet-stream");

        return response;
}

这篇关于如何从Web API控制器返回文件?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！