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我有一个 asp.net Web 应用程序，其中 sessionstate 模式是“InProc”。对于 Inproc，默认情况下会话到期时间为 20 分钟。我想在会话到期前一分钟显示会话到期倒计时弹出窗口。但我找不到一个属性，说明有多少 mimutes 已经过去了。如何知道是否是第 19 分钟。现在我正在做如下： 

if (Context.Session != null)// Check whether the session is null
             { 
              if (Session.IsNewSession)// If the session is null, check whether the session is new
               {
               Response.Redirect("../SessionTimeout.aspx");//Redirect to time out page
               }
             }
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1 回答 1

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您可以使用一些 ajax 来完成此操作。这是一个可能的解决方案：

<script type="text/javascript">

    function checkAuthenticated() {
        {
            $.ajax({
                type: "POST",
                url: "CheckAutheticated.asmx/checkAuthenticated",
                data: "{}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: checkAuthenticatedOk,
                error: checkAuthenticatedError
            });
        }
    }
    function checkAuthenticatedOk() { }
    function checkAuthenticatedError() {
        $("#sessionExpiredCover").show();
    }
    </script>
    <style type="text/css">
    #sessionExpiredCover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100000;
    display: none;
    background-color: #fff;
    /*opacity: .7;
    filter:progid:DXImageTransform.Microsoft.BasicImage(opacity=.7);*/
    }
    </style>

<div id="sessionExpiredCover">
    <div style="background-color:#fff; margin:100px; height:200px; width:400px;"><h1>Session expired</h1>
        <br />
        <asp:HyperLink NavigateUrl="~/Login.aspx" runat="server" Text="Please log in again" />
    </div>
</div>

那么你必须在 WebMethod 中开发你的倒计时代码：

<%@ WebService Language="C#" Class="CheckAutheticated" %>

using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment     the following line. 
[System.Web.Script.Services.ScriptService]
public class CheckAutheticated  : System.Web.Services.WebService {

[WebMethod]
public string checkAuthenticated()
{
   //your countDownCode 
   return "authenticated";
}

}
于 2012-02-17T08:59:53.990 回答