001. 为input type=text 时设置默认值

1. 前端HTML代码

 1 <%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>
 2 
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 4 
 5 <html xmlns="http://www.w3.org/1999/xhtml">
 6 <head runat="server">
 7     <title>HTML服务器控件</title>
 8     <script type="text/javascript" runat="server">
 9         //protected void Page_Load(Object sender, EventArgs e) //如果在当前页面设置Load事件, 那么.cs文件中的load的事件将会被覆盖
10         //{
11         //    this.MyText.Value = "hello world!"; //设置input的默认值
12         //}
13     </script>
14     <style type="text/css">
15         #MyText
16         {
17             width:188px;
18             }
19     </style>
20 </head>
21 <body>
22     <form id="form1" runat="server">
23     <input id="MyText" type="text" runat="server" />
24     </form>
25 </body>
26 </html>

2.下面是.cs中的load事件, 如果页面中有Page_load事件, 那么该事件将会被覆盖 (Page_load事件→页面初始化事件)

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Web;
 4 using System.Web.UI;
 5 using System.Web.UI.WebControls;
 6 
 7 public partial class _Default : System.Web.UI.Page 
 8 {
 9     protected void Page_Load(object sender, EventArgs e)
10     {
11         if (!IsPostBack)
12         {
13             this.MyText.Value = "我是首次加载";
14         }
15         else
16         {
17             this.MyText.Value = "我不是首次加载";
18         }
19     }
20 }