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webform1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="work013.WebForm1" %>
           
   
    
    
        
             
         
    
    
   

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 work013{    public partial class WebForm1 : System.Web.UI.Page    {        protected void Page_Load(object sender, EventArgs e)        {            TextBox1.Text = "";        }        protected void Button1_Click(object sender, EventArgs e)        {            //点击会报错，是因为页面开启了 ValidateRequest属性，可以在前台页面的属性中加 ValidateRequset = false        }    }}