Javascript 通过javascript从radiobuttonlist中获取值？
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Get the value from radiobuttonlist through javascript?
提问by vikas
I have a radibutton list.
我有一个单选按钮列表。
<asp:RadioButtonList ID="RadioButtonList1" runat="server"
RepeatDirection="Horizontal" RepeatLayout="flow" >
<asp:ListItem Selected="True" Text ="Yes" Value="0"></asp:ListItem>
<asp:ListItem Text ="No" Value="1"></asp:ListItem>
</asp:RadioButtonList>
And to get the value from radio list I have a function :
为了从广播列表中获取值，我有一个功能：
function getvalueofradiolist() {
var radiolist = document.getElementById('<%= RadioButtonList1.ClientID %>');
var rblName = radiolist.name;
var radio = document.getElementsByName(rblName);
for (var x = 0; x < radio.length; x++) {
if (radio[x].checked) {
alert("Selected item Value " + radio[x].value);
}
}
}
But it returns undefined.
但它返回未定义。
Did I write something wrong?
我写错了吗？
I am calling this function on button click.
我在单击按钮时调用此函数。
Suggest me If I can do this with the help of code behind in spite of Javascript.
建议我如果我可以在背后的代码的帮助下做到这一点，尽管有 Javascript。
回答by Afshin
<form runat="server">
<asp:RadioButtonList ID="RadioButtonList1" runat="server"
RepeatDirection="Horizontal" RepeatLayout="flow" >
<asp:ListItem Selected="True" Text ="Yes" Value="0"></asp:ListItem>
<asp:ListItem Text ="No" Value="1"></asp:ListItem>
</asp:RadioButtonList> </form>
<p id="button" onclick="getvalue()">click me</p>
<script type="text/javascript">
function getvalue(){
alert($('#<%=RadioButtonList1.ClientID %> input[type=radio]:checked').val());
}
</script>
回答by Tom
regarding the code
关于代码
var rblName = radiolist.name;
you don't even have name attribute
你甚至没有 name 属性
回答by Sandeep Pathak
You could try :
你可以试试：
function getvalueofradiolist() {
var radioButtonlist = document.getElementsByName("<%=RadioButtonList1.ClientID%>");
for (var x = 0; x < radioButtonlist.length; x++) {
if (radioButtonlist[x].checked) {
alert("Selected item Value " + radioButtonlist[x].value);
}
}
回答by Samuel Caillerie
An dwhat about getting the inputelements inside directly :
关于input直接获取元素的方法：
function getvalueofradiolist() {
var radiolist = document.getElementById('<%= RadioButtonList1.ClientID %>');
var radio = radiolist.getElementsByTagName("input");
for (var x = 0; x < radio.length; x++) {
if (radio[x].type === "radio" && radio[x].checked) {
alert("Selected item Value " + radio[x].value);
}
}
}
