c# - 如何从 web api Controller 返回文件？

Question

我正在使用 MVC 5 web Api Controller ，我想返回一个文件:

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

    return Request.CreateResponse(statusCode, file);
}

这是行不通的。

postman 的异常(exception)情况是:

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

Answer 1

我正在发布对我有用的替代方案，以防其他人遇到麻烦。

[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;
}