如何检查/检测用户是否接受Cookie? 使用ASP.NET (C#)。
来自MSDN
确定浏览器是否接受Cookie的一种方法是尝试写入Cookie,然后再尝试读取它。如果您无法读取您写入的Cookie,则假定浏览器已关闭Cookie。
write:
Sub Page_Load()
If Not Page.IsPostBack Then
If Request.QueryString("AcceptsCookies") Is Nothing Then
Response.Cookies("TestCookie").Value = "ok"
Response.Cookies("TestCookie").Expires = _
DateTime.Now.AddMinutes(1)
Response.Redirect("TestForCookies.aspx?redirect=" & _
Server.UrlEncode(Request.Url.ToString))
Else
labelAcceptsCookies.Text = "Accept cookies = " & _
Request.QueryString("AcceptsCookies")
End If
End If
End Sub
然后阅读
Sub Page_Load()
Dim redirect As String = Request.QueryString("redirect")
Dim acceptsCookies As String
' Was the cookie accepted?
If Request.Cookies("TestCookie") Is Nothing Then
' No cookie, so it must not have been accepted
acceptsCookies = 0
Else
acceptsCookies = 1
' Delete test cookie
Response.Cookies("TestCookie").Expires = _
DateTime.Now.AddDays(-1)
End If
Response.Redirect(redirect & "?AcceptsCookies=" & acceptsCookies, _
True)
End Sub
将一个值保存到cookie中,重定向到某个页面并尝试读取该值。如果成功,说明启用了cookie。否则,未启用。