asp.net core PhysicalFileResult导致浏览器地址栏访问图片变成了下载

Question

[HttpGet("DownloadFile")]public IActionResult DownloadFile([FromServices]IHostingEnvironment env, string id){Attachment attachment = AttachmentSystem.GetById(User.Corp.Id, id);if (attachment == null){return NotFound();}string path = Path.Combine(env.ContentRootPath, attachment.SavePath);if (!System.IO.File.Exists(path)){return NotFound();}return PhysicalFile(path, MimeMapping.GetMimeMapping(Path.GetExtension(path)), attachment.SourceName + Path.GetExtension(path));}用以上方式输出图片，地址栏直接访问会下载图片，怎么修改才能直接在浏览器里显示

Answer 1

可以使用 FileStreamResult ，下面的代码实测有效

public async Task<IActionResult> Index(){    var fs = new FileStream("wwwroot/images/logo.png", FileMode.Open);    
    return new FileStreamResult(fs, "image/png");
}