<%@ 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"]); } } }