页面上有个服务器控件checkboxlist,想要获取选中的value值,
var chkObject = document.getElementById('<%=chkProjStatus.ClientID%>');
var chkInput =chkObject.getElementsByTagName("INPUT");
for(var i=0;i<chkInput.length;i++)
{
if(chkInput[i].checked)
{
alert(chkInput[i].value);
}
}
发现按上面的方法是取不到的, 由于checkboxlist在前台html页面表现中没有value属性,导致js无法获取选种的value值
须用程序来添加value和text属性,还是给个实际的dome吧 ,新建一个xx.aspx页面,cs文件代码如下
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
BindChkList();
}
}
///
/// 绑定复选框
///
private void BindChkList()
{
chkProjStatus.Items.Add(new ListItem("项目前期", "505004"));
chkProjStatus.Items.Add(new ListItem("项目进行中", "505001"));
chkProjStatus.Items.Add(new ListItem("项目中期", "505003"));
chkProjStatus.Items.Add(new ListItem("项目后期", "505005"));
chkProjStatus.Items.Add(new ListItem("项目结束", "505002"));
chkProjStatus.Items.Add(new ListItem("项目意外中止", "505006"));//这里您可以绑定数据库里的数据
string checkListValue = "";
string checkListText = "";
for (int i = 0; i < chkProjStatus.Items.Count; i++)
{
checkListValue += chkProjStatus.Items[i].Value + ",";
checkListText += chkProjStatus.Items[i].Text + ",";
}
checkListText = checkListText.TrimEnd(',');
checkListValue = checkListValue.TrimEnd(',');
//由于checkboxlist在前台html页面表现中没有value属性,导致js无法获取选种的value值
//这里用程序来添加value和text属性
chkProjStatus.Attributes["ListValue"] = checkListValue;
chkProjStatus.Attributes["ListText"] = checkListText;
}
aspx页面的js脚本这样来:
function CheckValue()
{
//在JS端调用CheckBoxList
var chkObject = document.getElementById('<%=chkProjStatus.ClientID%>');
var chkInput =chkObject.getElementsByTagName("INPUT");
var arrListValue = chkObject.ListValue.split(',');
var count = arrListValue.length;
var strCheckChecked = "";
var arrCheckChecked;
var chkValue = "";
//每次点击CheckBoxList的一个Item,都循环把所有Item的选中状态按0、1标志,存入一个变量,最后再根据这个标志来决定checkboxlist中要取的值
for (var i=0; i< chkInput.length; i++)
{
if(chkInput[i].checked)
{
strCheckChecked = strCheckChecked + "1" + ",";
}
else
{
strCheckChecked = strCheckChecked + "0" + ",";
}
}
arrCheckChecked = RTrim(strCheckChecked).split(',');
for(var j = 0; j < count; j++)
{
if(arrCheckChecked[j] == "1")
{
chkValue += arrListValue[j] +",";
}
}
chkValue = RTrim(chkValue);
alert(chkValue);
}
//如果有则移除末尾的逗号
function RTrim(str)
{
if(str.charAt(str.length-1)==",")
return str.substring(0,str.length-1);
else
return str;
}
OK,这样就搞定了:)
我上面是参考了博客园上 "人生苦短破茧"和"sammy知识库栖宇惊鸿的天下"写的关于checkboxlist用js取值的文章,综合了下,这样调用应该还是比较方便的,大家觉得有改进的地方回贴好了
参考文章如下:
http://www.cnblogs.com/songsh96/archive/2007/08/27/871911.html
http://www.cnblogs.com/Caceolod/articles/890809.html
关于这个方法我曾经在csdn论坛里也贴过,见笑了呵呵,csdn上有位同志给了一个更好更简便的方法我也贴出来,如下
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;
using System.Collections.Generic;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
List<string[]> metadata = new List<string[]>();
metadata.Add(new string[] { "项目前期", "505004"});
metadata.Add(new string[] { "项目进行中", "505001" });
metadata.Add(new string[] { "项目中期", "505003" });
metadata.Add(new string[] { "项目后期", "505005" });
metadata.Add(new string[] { "项目结束", "505002" });
metadata.Add(new string[] { "项目意外中止", "505006" });
ListItem lt;
for (int i = 0; i < metadata.Count; i++)
{
lt = new ListItem(metadata[i][0], metadata[i][1]);
lt.Attributes["text"] = metadata[i][0];
lt.Attributes["value1"] = metadata[i][1];
this.CheckBoxList1.Items.Add(lt);
}
}
}
HTML code
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
<html xmlns="" >
<head runat="server">
<title>无标题页title>
<script language="javascript" type="text/javascript">
function checkAll()
{
var ckelems = document.getElementById("CheckBoxList1").getElementsByTagName("input");
var spelems = document.getElementById("CheckBoxList1").getElementsByTagName("span");
for(var i=0;i<ckelems.length;i++)
{
if(ckelems[i].type=="checkbox")
{
if(ckelems[i].checked)
alert('文本是 '+spelems[i].text+' 值是 '+spelems[i].value1);
}
}
}
script>
head>
<body>
<form id="form1" runat="server">
<div>
<asp:CheckBoxList ID="CheckBoxList1" runat="server" Height="261px" Width="301px">
asp:CheckBoxList>
<input id="Button1" type="button" value="button" onclick="checkAll()"/>div>
form>
body>
html>
RadioButtonList:
1 <div>
2 意向落户地区:<asp:RadioButtonList ID="YiXiangLuoHuDiQu" runat="server" CssClass="textEnabled" RepeatDirection="Horizontal">
3 <asp:ListItem Value="金坛">金坛asp:ListItem>
4 <asp:ListItem Value="溧阳">溧阳asp:ListItem>
5 <asp:ListItem Value="武进">武进asp:ListItem>
6 <asp:ListItem Value="高新区">高新区asp:ListItem>
7 <asp:ListItem Value="天宁">天宁asp:ListItem>
8 <asp:ListItem Value="钟楼">钟楼asp:ListItem>
9 <asp:ListItem Value="戚墅堰">戚墅堰asp:ListItem>
10 <asp:ListItem Value="待定">待定asp:ListItem>
11 asp:RadioButtonList>
12 div>
13
14 <script language="javascript" type="text/javascript">
15 function check() {
16 var rbltable = document.getElementById("YiXiangLuoHuDiQu");
17 var rbs = rbltable.getElementsByTagName("INPUT");
18 var result = false;
19 for (var i = 0; i < rbs.length; i++) {
20 if (rbs[i].checked) {
21 result = true;
22 break;
23 }
24 }
25 if (result == false) {
26 alert('请选择意向落户地区');
27 }
28 return result;
29 }
30 script>
31
32 <asp:Button ID="btnSubmit" runat="server" OnClientClick="javascript:return check()" OnClick="btnSubmit_Click" Text="Button" />
做的过程中发现:RadioButtonList在客户端被翻译成了Table,通过getElementsByTagName("INPUT")方法获取它的所有子radio,对每个radio做个循环,看是否被选中,选中则返回true,未选中提示"请选择意向落户地区"返回false,下面看下被翻译出来的table内容:
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
Code
1 <TBODY>
2 <TR>
3 <TD><INPUT id=YiXiangLuoHuDiQu_0 value=金坛 type=radio name=YiXiangLuoHuDiQu><LABEL for=YiXiangLuoHuDiQu_0>金坛LABEL>TD>
4 <TD><INPUT id=YiXiangLuoHuDiQu_1 value=溧阳 type=radio name=YiXiangLuoHuDiQu><LABEL for=YiXiangLuoHuDiQu_1>溧阳LABEL>TD>
5 <TD><INPUT id=YiXiangLuoHuDiQu_2 value=武进 type=radio name=YiXiangLuoHuDiQu><LABEL for=YiXiangLuoHuDiQu_2>武进LABEL>TD>
6 <TD><INPUT id=YiXiangLuoHuDiQu_3 value=高新区 type=radio name=YiXiangLuoHuDiQu><LABEL for=YiXiangLuoHuDiQu_3>高新区LABEL>TD>
7 <TD><INPUT id=YiXiangLuoHuDiQu_4 value=天宁 type=radio name=YiXiangLuoHuDiQu><LABEL for=YiXiangLuoHuDiQu_4>天宁LABEL>TD>
8 <TD><INPUT id=YiXiangLuoHuDiQu_5 value=钟楼 type=radio name=YiXiangLuoHuDiQu><LABEL for=YiXiangLuoHuDiQu_5>钟楼LABEL>TD>
9 <TD><INPUT id=YiXiangLuoHuDiQu_6 value=戚墅堰 type=radio name=YiXiangLuoHuDiQu><LABEL for=YiXiangLuoHuDiQu_6>戚墅堰LABEL>TD>
10 <TD><INPUT id=YiXiangLuoHuDiQu_7 value=待定 type=radio name=YiXiangLuoHuDiQu><LABEL for=YiXiangLuoHuDiQu_7>待定LABEL>TD>
11 TR>
12 TBODY>
13
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