Javascript 在操作的情况下获取单选按钮的选定值
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getting selected value of radio button in case of action
提问by serhads
Hi here is the codes bellow, I've tried many things but I couldnt get value of selected radio button.As you can see I need to get that value for diffrent situations.
嗨，这里是下面的代码，我尝试了很多东西，但我无法获得所选单选按钮的值。如您所见，我需要为不同的情况获得该值。
<div style="display: inline-block">
<div>
<a href="/Login/LogOut">Log Out</a><span> Welcome </span>YS User 1 noName </div>
<br />
<br />
<br />
<br />
<input type="button" onclick="submitCreate();" value="New Survey" /><br />
<input type="button" onclick="submitEdit();" value="Edit Survey" /><br />
<input type="button" onclick="submitDelete();" value="Delete Survey" /><br />
<input type="button" onclick="submitPreview();" value="Preview Survey" />
</div>
<div style="display: inline-block">
<div>
<table class="MyTable"><thead><tr class="columnHead"><th scope="col"></th><th scope="col"><a href="/User/Index?sort=UserID&sortdir=ASC">CreatedBy</a></th><th scope="col"><a href="/User/Index?sort=CreatedDate&sortdir=ASC">Created Date</a></th><th scope="col"><a href="/User/Index?sort=IsRunning&sortdir=ASC">Is Running</a></th></tr></thead><tbody><tr><td> <input name="selected" id="1"
type="radio" value="1" /></td><td>1</td><td>12/12/2011 3:43:57 PM</td><td>False</td></tr><tr class="altRow"><td> <input name="selected" id="2"
type="radio" value="2" /></td><td>1</td><td>12/13/2011 4:42:37 PM</td><td>False</td></tr><tr><td> <input name="selected" id="3"
type="radio" value="3" /></td><td>1</td><td>12/13/2011 6:27:38 PM</td><td>False</td></tr></tbody></table>
</div>
</div>
</body>
</html>
<script type="text/javascript">
// var value = $$('input[name=selected]:checked')[0].get('value');
// var selectFoo;
// $$('input[name=selected]').each(function (el) {
// if (el.checked == true) {
// selectFoo = el.value;
// }
// });
function getCheckedValue(radioObj) {
if (!radioObj)
return "";
var radioLength = radioObj.length;
if (radioLength == undefined)
if (radioObj.checked)
return radioObj.value;
else
return "";
for (var i = 0; i < radioLength; i++) {
if (radioObj[i].checked) {
return radioObj[i].value;
}
}
return "";
};
function submitCreate() {
var adress = "/User/CreateSurvey/";
document.location = adress;
};
function submitEdit() {
var adress = "/Den/Index/" + getCheckedValue('selected');
document.location = adress;
};
function submitDelete() {
var adress = "/User/DeleteSurvey/" + getCheckedValue('selected');
document.location = adress;
};
function submitPreview() {
var adress = "/User/PreviewSurvey/" + getCheckedValue('selected');
document.location = adress;
};
</script>
回答by sudocode
You can use document.getElementsByName(<button_name>)or document.getElementsByTagName("input")to get an array of input elements. Loop through those elements to check which is checked.
您可以使用document.getElementsByName(<button_name>)或document.getElementsByTagName("input")来获取输入元素数组。循环遍历这些元素以检查哪个是checked。
Here is an example of how to get the value of the checked button from a set of radio buttons with the name "selected":
下面是一个示例，说明如何从一组名为“selected”的单选按钮中获取选中按钮的值：
<html>
<head>
<script type="text/javascript">
function get_radio_value() {
var inputs = document.getElementsByName("selected");
for (var i = 0; i < inputs.length; i++) {
if (inputs[i].checked) {
return inputs[i].value;
}
}
}
function onSubmit() {
var id = get_radio_value();
alert("selected input is: " + id);
}
</script>
</head>
<body>
<form onsubmit="onSubmit();">
<input name="selected" value="1" type="radio"/>1<br/>
<input name="selected" value="2" type="radio"/>2<br/>
<input name="selected" value="3" type="radio"/>3<br/>
<input type="submit" value="submit"/>
</form>
</body>
</html>
回答by Malathy
I choose let number of code for a required function. The one worked for me is given below from api.jquery.com. Hope this helps others.
我为所需的功能选择了让代码数量。下面从 api.jquery.com 给出了对我有用的那个。希望这对其他人有帮助。
HTML
HTML
<input type="radio" name="option" value="o1">option1</input>
<input type="radio" name="option" value="o2">option2</input>
JavaScript
JavaScript
var selectedOption = $("input:radio[name=option]:checked").val()
The variable selectedOption will contain the value of the selected radio button (i.e) o1 or o2
变量 selectedOption 将包含所选单选按钮的值（即）o1 或 o2
