asp.net 4.5 práctica ~ test17-5 el uso del temporizador ajax

webform1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="test17_5.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
        <asp:Timer ID="Timer1" runat="server" Interval="10000" OnTick="Timer1_Tick"></asp:Timer>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="Timer1"/>
            </Triggers>
            <ContentTemplate>
                汇率：1美元 兑换 人民币 &nbsp;<asp:Label ID="StockPrice" runat="server" Text=""></asp:Label><br />
                时间：<asp:Label ID="TimeOfPrice" runat="server" Text=""></asp:Label><br />

            </ContentTemplate>
        </asp:UpdatePanel>
        <div>
            <br />刷新频率：<br /><br />
            <asp:RadioButton ID="RadioButton1" runat="server" GroupName="timer" AutoPostBack="true" Text="2秒"  OnCheckedChanged="RadioButton1_CheckedChanged"/><br />
            <asp:RadioButton ID="RadioButton2" runat="server" GroupName="timer" AutoPostBack="true" Text="20秒" OnCheckedChanged="RadioButton2_CheckedChanged"/><br />
            <asp:RadioButton ID="RadioButton3" runat="server" GroupName="timer" AutoPostBack="true" Text="不刷新" OnCheckedChanged="RadioButton3_CheckedChanged" /><br />
            <br />
            页面最后更新时间：
            <asp:Label ID="OriginalTime" runat="server" Text=""></asp:Label>
        </div>
    </div>
    </form>
</body>
</html>

webform1.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace test17_5
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            this.OriginalTime.Text = DateTime.Now.ToLongTimeString();
        }

        protected void Timer1_Tick(object sender, EventArgs e)
        {
            this.StockPrice.Text = GetStockPrice();
            TimeOfPrice.Text = DateTime.Now.ToLongTimeString();
        }

        private string GetStockPrice()
        {
            double randomStockPrice = 6.7 + new Random().NextDouble();
            return randomStockPrice.ToString("C");
        }

        protected void RadioButton1_CheckedChanged(object sender, EventArgs e)
        {
            Timer1.Enabled = true;
            Timer1.Interval = 2000;
        }

        protected void RadioButton2_CheckedChanged(object sender, EventArgs e)
        {
            Timer1.Enabled = true;
            Timer1.Interval = 20000;
        }

        protected void RadioButton3_CheckedChanged(object sender, EventArgs e)
        {
            Timer1.Enabled = false;
        }
    }
}

asp.net 4.5 práctica ~ test17-5 el uso del temporizador ajax

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