vb.net Cookie在关闭浏览器时被删除？

Question

我遇到cookie过期的问题。 虽然我在3天后设定了到期但是cookie 关闭浏览器后会被删除。

这是我的代码。

  Private Sub setMyCookie(ByVal username As String)
        '------- check for user input; if checkbox is checked on login.
        If CheckBox1.Checked Then
            '------- check if browser support cookies
            If (Request.Browser.Cookies) Then
                '------- check if the cookie with name 'myCookie' exists on users machine.
                If (Request.Cookies("myCookie") Is Nothing) Then
                    '------- create a cookie & write username to it
                    Response.Cookies("myCookie").Value = username
                    '-------  with expiry of 3 days
                    Response.Cookies("myCookie").Expires = Now.AddDays(3)
                    '------- write username to the cookie
                    'Response.Cookies("myCookie").Item("UserLoginName") = username
                Else
                    Response.Cookies("myCookie").Value = username
                    Response.Cookies("myCookie").Expires = Now.AddDays(3)
                End If
            End If
        End If
    End Sub