c# - ASP.NET - Javascript 超时警告基于 web.config 中的 sessionState 超时

Question

问题:我希望在基于我的 webconfig sessionState TimeOut 属性的 c# 代码背后的 asp.net 页面上创建超时警告消息。

web.config 中的代码:

<configuration>
    <system.web>
        <sessionState timeout="20"></sessionState>
    </system.web>
</configuration>
<system.serviceModel>
    <bindings>
        <basicHttpBinding>
            <binding name="EchoSignDocumentService10HttpBinding" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="6553600" maxBufferPoolSize="524288" maxReceivedMessageSize="6553600" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true">
                <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="1638400" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
                <security mode="Transport">
                    <transport clientCredentialType="None" proxyCredentialType="None" realm="" />
                    <message clientCredentialType="UserName" algorithmSuite="Default" />
                </security>
            </binding>
            <binding name="EchoSignDocumentService10HttpBinding1" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true">
                <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
                <security mode="None">
                    <transport clientCredentialType="None" proxyCredentialType="None" realm="" />
                    <message clientCredentialType="UserName" algorithmSuite="Default" />
                </security>
            </binding>
        </basicHttpBinding>
    </bindings>
</system.serviceModel>

Answer 1

伪代码:

• 读取代码隐藏中的超时设置
• 注册一个ClientScriptblock(setTimeout传递超时时间(20 * 60))
• 超时时，在页面上显示警告标签

示例代码:

    public void RegisterTimeoutWarning(System.Web.UI.Page Page)
    {
        var timeout = HttpContext.Current.Session.Timeout * 60 * 1000;
        Page.ClientScript.RegisterStartupScript(Page.GetType(), 
                "timeoutWarning", 
                string.Format("setTimeout(function () {{ alert('Session about to expire'); }}, {0});", timeout), true);
    }

当然，您可以通过显示警告弹出窗口甚至确认弹出窗口来改进客户端显示(而不是显示警报)，然后您可以使用它来更新 session 。