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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="Test.WebForm1" %>
<!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>无标题页</title>
<script>
function setvalue(){
var obj = document.getElementById("selectuser");
obj.options.add(new Option('01','b'));
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<select name= "selectuser" id="selectuser" multiple style="width: 167px; height: 137px" runat="server">
</select>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
<input id="set" type="button" value="set" OnClick="setvalue();"/></div>
</form>
</body>
</html>
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;
namespace Test
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack) return;
}
protected void Button1_Click(object sender, EventArgs e)
{
//要求能取到value和Text
foreach (ListItem li in this.selectuser.Items)
{
Response.Write(li.Value);
Response.Write(li.Text);
}
}
}
}
<script>
function setvalue(){
var obj = document.getElementById("selectuser1");
obj.value="1111";
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<textarea id="selectuser1" style="height: 94px" runat="server"></textarea>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
<input id="set" type="button" value="set" OnClick="setvalue();"/></div>
</form>
</body>
注意:换成了TextArea
protected void Button1_Click(object sender, EventArgs e)
{
string s = this.selectuser1.Value;//为什么用TextArea却能获取值呢?而用htmlselect却不行??????
}