[研究][C#][ASP.NET][WebForm] Master Page 的 Session Time Out 自動登出前倒數計時
2020-11-17
續這篇
[研究][C#][ASP.NET][WebForm] Session Time Out 自動登出前倒數計時
http://shaurong.blogspot.com/2020/11/caspnetwebform-session-time-out.html
測試工具 Visual Studio 2019 v16.8.1 版
Site1.Master
<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site1.master.cs" Inherits="WebApplication1.Site1" %>
<!DOCTYPE html>
<html>
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<asp:ContentPlaceHolder ID="head" runat="server">
</asp:ContentPlaceHolder>
</head>
<body>
<form id="form1" runat="server">
<div>
<%--https://docs.microsoft.com/zh-tw/dotnet/api/system.web.ui.timer?view=netframework-4.8--%>
<%--https://docs.microsoft.com/zh-tw/dotnet/api/system.web.sessionstate.httpsessionstate.timeout?view=netframework-4.8--%>
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<%--Interval="1000" 是每1秒觸發一次--%>
<asp:Timer ID="Timer1" runat="server" Interval="1000" OnTick="Timer1_Tick"></asp:Timer>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Button ID="Button_Timer" runat="server" BackColor="LightGreen" Height="40px" Width="100px" Style="border-radius: 8px" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Timer1" EventName="tick" />
</Triggers>
</asp:UpdatePanel>
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
</div>
</form>
</body>
</html>
|
Site1.Master.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class Site1 : System.Web.UI.MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
// --------------------------------------------------------------------------------
// 顯示 Session Time Out 時間 (Begin)
int timeout = System.Web.HttpContext.Current.Session.Timeout;
// 設定 Session Time Out 時間 20 分鐘
//if (!ScriptManager1.IsInAsyncPostBack) // Fail, 當 ScriptManager1 在 MasterPage 時候不能這樣存取
//if (!Master.ScriptManager1.IsInAsyncPostBack) // Fail
//if (!this.Master.FindControl("ScriptManager1").IsInAsyncPostBack) // Fail
ScriptManager scriptManager = ScriptManager.GetCurrent(this.Page);
if (!scriptManager.IsInAsyncPostBack)
{
// 把目前的時間，加上 Session Time Out 設定值，
//Session["timeout"] = DateTime.Now.AddMinutes(20).ToString();
Session["timeout"] = DateTime.Now.AddMinutes(timeout).ToString();
}
// 顯示 Session Time Out 時間 (End)
// --------------------------------------------------------------------------------
}
protected void Timer1_Tick(object sender, EventArgs e)
{
if (0 > DateTime.Compare(DateTime.Now,
DateTime.Parse(Session["timeout"].ToString())))
{
Button_Timer.Text = ((Int32)DateTime.Parse(Session["timeout"].
ToString()).Subtract(DateTime.Now).Minutes).ToString()
+ ":" +
((Int32)DateTime.Parse(Session["timeout"].
ToString()).Subtract(DateTime.Now).Seconds).ToString();
}
}
}
}
|
重點是使用 Master Page 時候， Site1.Master 中，
if (!ScriptManager1.IsInAsyncPostBack)
要改成
ScriptManager scriptManager = ScriptManager.GetCurrent(this.Page);
if (!scriptManager.IsInAsyncPostBack)
才行。
Default.aspx (不用特別去修改)
<%@ Page Title="" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1.Default" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> </asp:Content> |
Default.aspx.cs (不用特別去修改)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
}
}
|
Web.Config (預設 20 分鐘，可以不用特別去設定)
<configuration> <system.web>
<sessionState timeout="20"></sessionState>
</system.web>
</configuration>
|
(完)
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