webform1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="test6_10.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>
        姓名：<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        年龄：<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br />
        <asp:Button ID="Button1" runat="server" Text="保存" OnClick="Button1_Click" />&nbsp;&nbsp;
        <asp:Button ID="Button2" runat="server" Text="获取" OnClick="Button2_Click" /><br />
        <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
    </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 test6_10
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            Label1.Text = "";
            ViewState["Name"] = TextBox1.Text;
            ViewState["Age"] = TextBox2.Text;
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            if(ViewState["Name"] != string.Empty && ViewState["Age"] != string.Empty)
            {
                Label1.Text = ViewState["Name"] + "&nbsp;&nbsp;" + ViewState["Age"];
            }
            
        }
    }
}