删除和删除我的ASP NET c-sharp应用程序的所有cookie
在发送邮件电子邮件后，我需要删除和删除我的 ASP NET c-sharp 应用程序的所有cookie。
I need remove and delete all cookies of my ASP NET c-sharp application after sent on message email.
我已经尝试过解决方案没有成功，因为出现此错误。
I have tried this solution without success because I have this error.
Server cannot modify cookies after HTTP headers have been sent.
在此行：
HttpContext.Current.Response.Cookies.Add(expiredCookie);
消息电子邮件定期启动。
The message email started regularly.
谷歌搜索对我没有帮助。
The google search does not help me.
有人知道我该怎么解决吗？
Anybody know how can I resolve do this?
你能建议吗？
您能帮我吗？
我的下面的代码。
谢谢。
private void ExpireAllCookies()
{
if (HttpContext.Current != null)
{
int cookieCount = HttpContext.Current.Request.Cookies.Count;
for (var i = 0; i < cookieCount; i++)
{
var cookie = HttpContext.Current.Request.Cookies[i];
if (cookie != null)
{
var cookieName = cookie.Name;
var expiredCookie = new HttpCookie(cookieName) { Expires = DateTime.Now.AddDays(-1) };
HttpContext.Current.Response.Cookies.Add(expiredCookie);
}
}
HttpContext.Current.Request.Cookies.Clear();
}
}
............
{
smtpClient.Send(mailMessagePlainText);
ExpireAllCookies();
Page.ClientScript.RegisterStartupScript(this.GetType(), "Alert", "alert('Ok.');window.location='http://...';", true);
}
catch (Exception ex)
{
throw (ex);
}
实际上，没有办法正确执行此操作。
Actually, there is no way to do this correctly.
请考虑以下代码：
foreach (string key in Request.Cookies.AllKeys)
{
HttpCookie c = Request.Cookies[key];
c.Expires = DateTime.Now.AddMonths(-1);
Response.AppendCookie(c);
}
这将起作用，但前提是所有cookie都在根路径上设置，也称为 / 。
如果将cookie设置为虚拟目录，它将无法使用，因为cookie的路径不会与cookie一起发送。 Cookie仅发送名称和值，而没有其他内容，也就是说，没有路径。
This will work, but only if all cookies are set on root path, aka /.
If the cookie is set to a virtual directory, it won't work, because the cookie's path does NOT get sent along with the cookie. A cookie only sends the name and the value, and nothing else, that is to say, no path.
因此，如果要使用上述方法删除服务器上的Cookie，将无法删除所有具有路径 / Kamikatze /
So if you want to delete the cookies on the server with the above method, it will fail to delete all cookies that have, for example, path /Kamikatze/
的cookie，因此更正确的变体是：
So a more correct variant would be:
Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
context.Response.ContentType = "text/plain"
context.Response.Write("Die folgenden Cookies wurden gelöscht: ")
If context.Session IsNot Nothing Then
context.Session.Clear()
context.Session.Abandon()
End If
For Each key As String In context.Request.Cookies.AllKeys
context.Response.Write(key)
context.Response.Write(System.Environment.NewLine)
Dim c As HttpCookie = context.Request.Cookies(key)
' Here, the proc2-cookie is set on the VirtualPath ... '
' You need to handle all non-root cookies here, with if or switch or dictionary '
If "proc2".Equals(key, StringComparison.InvariantCultureIgnoreCase) Then
c.Path = System.Web.Hosting.HostingEnvironment.ApplicationVirtualPath + "/"
End If
' For Set-Cookie without domain attribute,
' the cookie's domain value is "the origin server".
' treat an absent Domain attribute as if the Domain attribute
' were present And contained the current host name
' c.Domain = context.Request.Url.Host
c.Expires = System.DateTime.UtcNow.AddMonths(-1)
context.Response.Cookies.Set(c)
Next key
' clear cookies server side
context.Request.Cookies.Clear()
End Sub
另请参见是否可以获取存储的cookie的路径？
和 MDN Set-Cookie 。