ASP的.NET Web API下载图像为二进制 [英] ASP .Net Web API downloading images as binary

问题描述

我想尝试使用的Web API进行REST调用，但我想回应是存储在数据库中，而不是一个JSON的base64连接codeD字符串实际的二进制图像。任何人都得到一些指点一下吗？

更新 -
这是我最后落实

 的Htt presponseMessage结果=新的Htt presponseMessage（的HTTPStatus code.OK）;
 result.Content =新StreamContent（新的MemoryStream（profile.Avatar））;
 result.Content.Headers.ContentType =新MediaTypeHeaderValue（应用程序/八位字节流）;
 result.Content.Headers.ContentDisposition =新ContentDispositionHeaderValue（附件）;
 result.Content.Headers.ContentDisposition.FileName =avatar.png;
 返回结果;
 

解决方案

您可以设置响应内容到StreamContent对象：

  VAR FILESTREAM =新的FileStream（路径，FileMode.Open）;        VAR RESP =新的Htt presponseMessage（）
        {
            内容=新StreamContent（FILESTREAM）
        };        //查找MIME类型
        串mime类型= _extensions [Path.GetExtension（路径）];
        resp.Content.Headers.ContentType =新MediaTypeHeaderValue（mime类型）;
 

I want to try to use Web API make a rest call but I want the response to be the actual binary image stored in a database, not a JSON base64 encoded string. Anyone got some pointers on this?

Update- This is what I ended up implementing:

 HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
 result.Content = new StreamContent(new MemoryStream(profile.Avatar));
 result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
 result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
 result.Content.Headers.ContentDisposition.FileName = "avatar.png";
 return result;

解决方案

You can set the response content to a StreamContent object:

        var fileStream = new FileStream(path, FileMode.Open);

        var resp = new HttpResponseMessage()
        {
            Content = new StreamContent(fileStream)
        };

        // Find the MIME type
        string mimeType = _extensions[Path.GetExtension(path)];
        resp.Content.Headers.ContentType = new MediaTypeHeaderValue(mimeType);

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