ASP NET 2.0 Cookie [英] ASP NET 2.0 Cookie

问题描述

我有一个在ASP网站上运行的C＃实用程序。当用户登录

时，ASP代码使用Response.Cookie写入cookie。我尝试在C＃中读取

相同的cookie。我无法用C＃代码阅读它。


我正在使用Request.Cookies [" cookiename"]。Value.ToString（）。我可以在ASP代码中读取

相同的cookie。

如果我说ASP中的Request.Cookies（CookieName）工作正常..

I have a C# utility that runs in ASP website. When user logs in the
ASP code writes the cookie using Response.Cookie. I try to read the
same cookie in C#. I am unable to read it in C# code.

I am using Request.Cookies["cookiename"].Value.ToString(). I can read
the same cookie in ASP code.
If I say Request.Cookies("CookieName") in ASP that works fine..

推荐答案

re：

！我正在使用Request.Cookies [" cookiename"]。Value.ToString（）


尝试以下两种方法之一：


1.


if（Request.Cookies [" cookieName"] ！= null）

Label1.Text = Server.HtmlEncode（Request.Cookies [" cookieName"]。Value）;


2.

if（Request.Cookies [" cookieName"]！= null）

{

HttpCookie aCookie = Request.Cookies [" cookieName"];

Label1.Text = Server.HtmlEncode（aCookie.Value）;

}


在尝试获取a的值之前cookie，你应该确保cookie存在;

如果cookie不存在，你将得到一个NullReferenceException异常。


另请注意HtmlEncode米ethod被调用来编码cookie的内容

，然后在页面中显示它。这可以确定恶意用户没有在cookie中添加
可执行脚本。


Juan T. Llibre，asp.net MVP

asp.net faq： http://asp.net.do/faq/

foros de asp.net，en espa？ol： http://asp.net.do/foros/

========================= =============

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re:
!I am using Request.Cookies["cookiename"].Value.ToString()

Try either of these approaches :

1.

if(Request.Cookies["cookieName"] != null)
Label1.Text = Server.HtmlEncode(Request.Cookies["cookieName"].Value);

2.
if(Request.Cookies["cookieName"] != null)
{
HttpCookie aCookie = Request.Cookies["cookieName"];
Label1.Text = Server.HtmlEncode(aCookie.Value);
}

Before trying to get the value of a cookie, you should make sure that the cookie exists;
if the cookie does not exist, you will get a NullReferenceException exception.

Notice also that the HtmlEncode method was called to encode the contents of a cookie
before displaying it in the page. This makes certain that a malicious user has not added
executable script into the cookie.

Juan T. Llibre, asp.net MVP
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en espa?ol : http://asp.net.do/foros/
======================================
<ic********@gmail.comwrote in message news:17**********************************@v26g2000 prm.googlegroups.com...

>我有一个在ASP网站上运行的C＃实用程序。当用户登录

时，ASP代码使用Response.Cookie写入cookie。我尝试在C＃中读取

相同的cookie。我无法用C＃代码阅读它。


我正在使用Request.Cookies [" cookiename"]。Value.ToString（）。我可以在ASP代码中读取

相同的cookie。

如果我说ASP中的Request.Cookies（CookieName）工作正常..

>I have a C# utility that runs in ASP website. When user logs in the
ASP code writes the cookie using Response.Cookie. I try to read the
same cookie in C#. I am unable to read it in C# code.

I am using Request.Cookies["cookiename"].Value.ToString(). I can read
the same cookie in ASP code.
If I say Request.Cookies("CookieName") in ASP that works fine..

我知道如何阅读cookie。问题是，当我尝试在

C＃中读取它时，它总是返回null。在ASP中，它返回cookie的值。

I know how to read the cookie. The problem is when I try to read it in
C# it always returns null. In ASP it returns the value of the cookie.

re：

！我知道如何阅读cookie。

！问题是当我尝试在C＃中读取它时它总是返回null。


那么，你使用的代码都没有读过正确的cookie，

或cookie没有正确设置。


您是否尝试过我发布的代码来读取cookie？


至于设置cookie，这里有2个样本C＃代码片段：


1.

Response.Cookies [" ; userName"] .Value =" patrick";

Response.Cookies [" userName"]。Expires = DateTime.Now.AddDays（1）;


2.

HttpCookie aCookie =新的HttpCookie（" lastVisit"）;

aCookie.Value = DateTime.Now.ToString（）;

aCookie.Expires = DateTime.Now.AddDays（1）;

Response.Cookies.Add（aCookie）;


你如何设置饼干？

你到期了吗？


Juan T. Llibre，asp.net MVP

asp.net faq： http://asp.net.do/faq/

foros de asp。 net，en espa？ol： http://asp.net.do/foros/

====================================== />
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re:
!I know how to read the cookie.
!The problem is when I try to read it in C# it always returns null.

Then, either the code you''re using doesn''t read the cookie properly,
or the cookie isn''t being set correctly.

Have you tried the code I posted to read cookies ?

As for setting cookies, here''s 2 sample C# code fragments :

1.
Response.Cookies["userName"].Value = "patrick";
Response.Cookies["userName"].Expires = DateTime.Now.AddDays(1);

2.
HttpCookie aCookie = new HttpCookie("lastVisit");
aCookie.Value = DateTime.Now.ToString();
aCookie.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(aCookie);

How are you setting the cookie ?
Are you expiring the cookie ?

Juan T. Llibre, asp.net MVP
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en espa?ol : http://asp.net.do/foros/
======================================
<ic********@gmail.comwrote in message news:11**********************************@z16g2000 prn.googlegroups.com...

>我知道如何阅读cookie。问题是，当我尝试在

C＃中读取它时，它总是返回null。在ASP中，它返回cookie的值。

>I know how to read the cookie. The problem is when I try to read it in
C# it always returns null. In ASP it returns the value of the cookie.

这篇关于ASP NET 2.0 Cookie的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！