ViewState 视图状态对象实例

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="DemoViewState.aspx.cs" Inherits="WebApplication1.DemoViewState" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="增长" />
        <br />
        <br />
        <asp:Button ID="Button2" runat="server" onclick="Button2_Click" Text="加1" />
    
    </div>
    </form>
</body>
</html>

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 DemoViewState : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        public int i = 0;
        protected void Button1_Click(object sender, EventArgs e)
        { 
            i++;
            Response.Write(i); 
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            //ViewState 视图状态对象,它的数据是存在在页面的那个隐藏域
            if (ViewState["count"] == null)
            {
                ViewState["count"] = 10;
            }
            else
            {
                int x = Convert.ToInt32(ViewState["count"]);
                x++;
                ViewState["count"] = x;
            }
            Response.Write(ViewState["count"]);
        }
    }
}

ViewState 视图状态对象实例

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