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Server cannot modify cookies after HTTP headers have been sent
mvc 在ActionResult 加载时候回去读取客户端cookie,如果不存在在添加个cookie
但是却出现:Server cannot modify cookies after HTTP headers have been sent.
但是却出现:Server cannot modify cookies after HTTP headers have been sent.
System.Web.HttpCookie cookie = new System.Web.HttpCookie(cookieName);
cookie.Value = s;
cookie.Expires = DateTime.Now.AddHours(24 * 365);
cookie.Domain = ".xx.com";
cookie.Path = "/";
contorler.Response.Cookies.Add(cookie);
...全文
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zhangxiaoqiancd 2014-11-27
我是在用Asp.Net，GridView控件导出Excel表的时候，报的这个错：Server cannot set content type after HTTP headers have been sent.请问是怎么解决的啊？
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smliang2011 2014-01-15
请问怎么解决的？
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zhaoruifeng_good 2013-04-23
请问怎么解决的 这个问题啊？
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shizhusz110 2013-02-27
感谢回复！问题已经得到解决！
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threenewbee 2013-02-07
道理很简单，如果你懂http协议的话。
http协议的响应类似这样：
http 1.1 200 ok //开始
server: ... //响应头
date: ...
set-cookie: xxx
<html> //这里是正文
<head>
...
...
你可以看到，一旦开始往客户端输出正文数据，你就不能再setcookie了。
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handyzhu 2013-02-07
只要不同时跳转和修改cookie、输出缓存，就能解决问题；
当然，也可以在webconfig配置中修改cacheRolesInCookie属性值设置成false就行了
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shizhusz110 2013-02-06
我觉得不是这个错误，他是说我 headers已经发送完成。这和修改无关。
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我是小李 2013-02-06
没看到你写的判断cookie是否存在的代码啊。这句是说你重复建立了吧。
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