楼上的方法是一般方法。除此方法外还可以:一种是从后台代码向前台写Javascript,一种是直接在前台写上Javascript,具体方法如下:
第一种方法:
【后台CS页Page_Load事件代码】
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)//根据情况而定看是否需要此判断
{
this.ClientScript.RegisterStartupScript(this.GetType(), "plok", "<script language='javascript' type='text/javascript'>okonfocus();</script>");
}
}
}
【前台页面脚本代码如下】
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!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>Input测试页</title>
<script language="javascript" type="text/javascript">
function okonfocus()
{
var myok = document.getElementById("OK");
myok.value = "OK已经获得了焦点,并执行了okonfocus()函数!";
myok.focus();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input id="OK" type="text" onfocus="okonfocus();" style="width: 435px"/>
</div>
</form>
</body>
</html>
第二种方法:
【只有前台页面脚本代码如下】
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!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>Input测试页</title>
<script language="javascript" type="text/javascript">
function okonfocus()
{
var myok = document.getElementById("OK");
myok.value = "OK已经获得了焦点,并执行了okonfocus()函数!";
myok.focus();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input id="OK" type="text" onfocus="okonfocus();" style="width: 435px"/>
</div>
<script language="javascript" type="text/javascript">
okonfocus();
</script>
</form>
</body>
</html>