前端调用webApi显示图片

Question

以前MVC直接调用Controller里面的方法
VIEW

 $("#imgEntering").attr("src", "/Center/DownloadPic?ftpPath=" + obj[0].PIC_URL + "");

Controller

 public FileResult DownloadPic(string ftpPath)
        {

            FtpWebRequest reqFTP;
            try
            {
                // 根据uri创建FtpWebRequest对象   
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpPath));

                // 指定执行什么命令  
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

                // 指定数据传输类型  
                reqFTP.UseBinary = true;
                reqFTP.UsePassive = false;

                // ftp用户名和密码  
                //reqFTP.Credentials = new NetworkCredential();
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                // 把下载的文件写入流
                Stream ftpStream = response.GetResponseStream();

                // 缓冲大小设置为2kb  
                int bufferSize = 2048;
                int readCount;
                byte[] buffer = new byte[bufferSize];
                MemoryStream mStream = new MemoryStream();
                //每次读文件流的2kb
                readCount = ftpStream.Read(buffer, 0, bufferSize);
                while (readCount > 0)
                {
                    //把内容从文件流写入   
                    //outputStream.Write(buffer, 0, readCount);
                    mStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }
                //关闭两个流和ftp连接
                ftpStream.Close();
                mStream.Close();
                response.Close();
                return File(mStream.ToArray(), "image/jpg");
            }
            catch (Exception ex)
            {
                byte[] file = new byte[0];
                return File(file, "image/jpg");
            }
        }

现在多了一个WEBAPI，前台调用WEBAPI读取图片，API返回图片流，直接在前台显示，求个解决方案

Answer 1

MVC返回图片base64字符，而不是2进制数据流

Asp.Net图片base64编码相互转换

然后通过data:image/gif;base64加载