我有一个MVC动作，调用如下：
http://localhost/Report/PrintContainerMasterTrayList?containerMasterId=x&type=downloadview
该操作具有以下签名
public ActionResult PrintContainerInstanceTrayList(int containerInstanceId, string type)
返回FilePathResult，如下所示：
return File(filename, "application/pdf");
这一切都很好，但在Chrome中，请求会触发两次。该请求仅在Firefox和IE11中生成一次。
原始请求
GET http://localhost/DEV-SAF/Report/PrintContainerMasterTrayList?containerMasterId=x&type=downloadview HTTP/1.1
Host: localhost
Connection: keep-alive
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.82 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Encoding: gzip, deflate, sdch
Accept-Language: en-GB,en;q=0.8
Cookie: .ASPXANONYMOUS=-
第二次请求
GET http://localhost/DEV-SAF/Report/PrintContainerMasterTrayList?containerMasterId=x&type=downloadview HTTP/1.1
Host: localhost
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.82 Safari/537.36
Accept: */*
Referer: http://localhost/DEV-SAF/Report/PrintContainerMasterTrayList?containerMasterId=x&type=downloadview
Accept-Encoding: gzip, deflate, sdch
Accept-Language: en-GB,en;q=0.8
两个请求的响应是相同的（在这种情况下，使用过多带宽的4Mb文件）。
导致此行为的原因是什么？
修改
第一个请求的回复是
HTTP/1.1 200 OK
Cache-Control: private, s-maxage=0
Content-Type: application/pdf
Server: Microsoft-IIS/10.0
Set-Cookie: .AUTH=xxxxxx; path=/; HttpOnly
X-AspNetMvc-Version: 5.2
Date: Wed, 03 Aug 2016 14:17:41 GMT
Content-Length: 3999
第二次请求的回复是
HTTP/1.1 200 OK
Cache-Control: private, s-maxage=0
Content-Type: application/pdf
Server: Microsoft-IIS/10.0
X-AspNetMvc-Version: 5.2
Date: Wed, 03 Aug 2016 14:17:46 GMT
Content-Length: 3999
答案 0 :(得分：0)
尝试使用以下内容添加Content-Disposition标头到您的操作中的响应＆＃34;附件;文件名=检验.pdf＆＃34;或者只是＆＃34;附件＆＃34;
Response.AppendHeader("Content-Disposition", "attachment");