update 完成房屋详情编辑的第一个页签

Api/Ewide.Core/Service/File/SysFileService.cs

@@ -133,7 +133,7 @@ namespace Ewide.Core.Service
             var file = await GetFileInfo(input);
             var filePath = Path.Combine(App.WebHostEnvironment.WebRootPath, file.FileBucket, file.FileObjectName);
             var fileName = HttpUtility.UrlEncode(file.FileOriginName, Encoding.GetEncoding("UTF-8"));
-            return new FileStreamResult(new FileStream(filePath, FileMode.Open), "application/octet-stream") { FileDownloadName = fileName };
+            return new FileStreamResult(new FileStream(filePath, FileMode.Open), Util.MimeMapping.GetMimeMapping(filePath)) { FileDownloadName = fileName };
         }
 
         /// <summary>