using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page

{

    public static int number = 0;

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            number = 0;

        }

    }

    protected void Button1_Click(object sender, EventArgs e)

    {

        ViewState["num"] = number;

        number = (int)ViewState["num"];

        number++;

        this.Label1.Text = "你点击了" + number.ToString() + "次";

    }

}