我有下表
<table>
<tr style="background-color: silver;">
<th>Check it</th>
<th>Estimate item</th>
<th>Quantity</th>
<th>Cost</th>
</tr>
<tr>
<td><input type="checkbox" value="450" /></td>
<td>Remove Tile</td>
<td><input type="text" value="1"></td>
<td>$450</td>
</tr>
<tr>
<td><input type="checkbox" value="550" /></td>
<td>Remove Tub</td>
<td><input type="text" value="1"></td>
<td>$550</td>
</tr>
<p>Calculated Price: $<input type="text" name="price" id="price" disabled /></p>
Table example 我找到了如何计算复选框值的总和：
<script>
$(document).ready(function () {
var $inputs = $('input[type="checkbox"]')
$inputs.on('change', function () {
var sum = 0;
$inputs.each(function() {
if(this.checked)
sum += parseInt(this.value);
});
$("#price").val(sum);
});
});
</script>
问题是： 如果用户将更新文本框中的数量，我需要更新总数。 我希望它以两种方式工作：检查复选框之前或之后的数量。
因此“成本”列中的值等于复选框值。我不想修改“费用”列。我需要在“textbox with id =”price“textbox。”
的表格底部显示总数案例： 用户选中了第一个复选框#price应该用450更新。 用户选中了第二个复选框#price should benow 1000。 用户使用第一个复选框将数量更改为2行。现在#price应更新为1450
提前致谢！
答案 0 :(得分：0)
为了达到这个目的，你应该遍历表体的行，以便使用代码
$('table tbody tr').each(function()
{
//do something
});
然后在该鱼巢中找到该复选框。您可以使用$tr.find('input[type="checkbox"]').is(':checked')此代码检查是否已选中该复选框。它将在行中找到一个复选框，它将检查天气是否被检查。
var $columns = $tr.find('td').next('td').next('td');此代码用于检索列数量。
我们调用函数calculateSum()来计算文本框更改事件和复选框更改事件中已检查行的总和。
$(document).ready(function() {
function calculateSum(){
var sumTotal=0;
$('table tbody tr').each(function() {
var $tr = $(this);
if ($tr.find('input[type="checkbox"]').is(':checked')) {
var $columns = $tr.find('td').next('td').next('td');
var $Qnty=parseInt($tr.find('input[type="text"]').val());
var $Cost=parseInt($columns.next('td').html().split('$')[1]);
sumTotal+=$Qnty*$Cost;
}
});
$("#price").val(sumTotal);
}
$('#sum').on('click', function() {
calculateSum();
});
$("input[type='text']").keyup(function() {
calculateSum();
});
$("input[type='checkbox']").change(function() {
calculateSum();
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="sum" type="button">Calculate</button><br/>
<table>
<tr style="background-color: silver;">
<th>Check it</th>
<th>Estimate item</th>
<th>Quantity</th>
<th>Cost</th>
</tr>
<tr>
<td><input type="checkbox" name="chck" value="450" /></td>
<td>Remove Tile</td>
<td><input type="text" name="qnty" value="1"></td>
<td>$450</td>
</tr>
<tr>
<td><input type="checkbox" class="chck" value="550" /></td>
<td>Remove Tub</td>
<td><input type="text" name="qnty" value="1"></td>
<td>$550</td>
</tr>
</table>
<p>Calculated Price: $<input type="text" name="price" id="price" disabled /></p>
答案 1 :(得分：0)
<div class="serve" id="service">
<form action="" id="roomform" onsubmit="return false">
<div class="order">
<fieldset>
<legend>Tell us where to clean:</legend>
<p>
<input value="30" type="checkbox" id="myCheck" class="sum" name="myCheck" oninput="x.value=parseInt(bedroom.value)*30.00"/>
<label for="sleeping" class="contain">Bedrooms (P30/room) </label>
<input type="number" id="a" class="room" value="1" min="1" max="20" onchange="calculateTotal()"/>
Total: P <span id="costPrice"> </span
</p>
<p>
<input value="20" type="checkbox" id="myCheck" class="sum" name="myCheck1" onclick="calculateTotal()" />
<label for="sitting" class="contain">Sitting room (P20/room)</label>
<input type="number" class="room" id="a" value="1" min="1" max="20" />
Total: P <output type="number" ></output>
</p>
<p>
<input value="20" type="checkbox" id="myCheck" class="sum" onclick="calculateTotal()" />
<label class="contain">Dining room (P20/room)</label>
<input type="number" class="room" id="a" value="1" min="1" max="20" />
Total: P <output type="number" ></output>
</p>
<p>
Extra services:</p>
<p>
<input value="15" type="checkbox" id="myCheck" class="sum" onclick="calculateTotal()" />
<label class="contain">Carpet Cleaning (P 15/room)</label>
<input type="number" class="room" id="a" value="0" min="0" max="20" />
Total: P <output type="number" ></output>
</p>
<p>
<input value="3" type="checkbox" id="myCheck" class="sum" onclick="calculateTotal()" />
<label class="contain">Window Cleaning (P 3/room)</label>
<input type="number" class="room" id="a" value="0" min="0" max="20" />
Total: P <output type="number" ></output>
</p>
<div class="grandPrice" >
Grand Total Price: P<span id="grandTotal">0</span>
</div>
</fieldset>
</div>
</form>
<script>
// When a checkbox is clicked
/*$('#order input[type=checkbox]').click(function() {
// Get user input and set initial variable for the total
inputBox = parseInt($('#a').val());
bedroomPrices = 0;
// If it's checked, add the current value to total
if($(this).prop('checked'))
{
thisValue = parseInt($(this).val());
bedroomPrices = bedroomPrices + thisValue;
}
// Output the total checkbox value multipled against user input
$('#costPrice').html(bedroomPrices * inputBox);
});*/
var checkbox = document.getElementsByClassName('sum'),
inputBox = document.getElementById('a'),
GrandTotal = document.getElementById('grandTotal');
//"(this.checked ? 1 : -1);" this sees if checkbox is checked or unchecked by adding or subtracting it (1 :-1)
//make sure that each checkbox total is added if its checked
for (var i=0; i < checkbox.length; i++) {
checkbox[i].onchange = function() {
var add = this.value * (this.checked ? 1 : -1);
grandTotal.innerHTML = parseFloat(grandTotal.innerHTML) + add
}
}
</div>
</body>
答案 2 :(得分：0)
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="indent_list">
<table border="1">
<thead>
<tr>
<th>rate</th>
<th>quantity</th>
<th>coltotal</th>
</tr>
</thead>
<body>
<tr>
<td><input type="text" id="val" class="rate" value="10"></td>
<td><input type="text" id="val" class="quantity" value="1"></td>
<td><input type="text" id="val" class="coltolal" value=""></td>
</tr>
<tr>
<td><input type="text" id="val" class="rate" value="10"></td>
<td><input type="text" id="val" class="quantity" value="2"></td>
<td><input type="text" id="val" class="coltolal" value=""></td>
</tr>
<tr>
<td><input type="text" id="val" class="rate" value="10"></td>
<td><input type="text" id="val" class="quantity" value="2"></td>
<td><input type="text" id="val" class="coltolal" value=""></td>
</tr>
</body>
<tfoot>
<tr>
<th class="rateRow"></th>
<th class="quantityRow"></th>
</tr>
<tr>
<th colspan="2" class="totalRow"></th>
</tr>
</tfoot>
</table>
</div>
> button
<input type="checkbox" class="btn btn-info checkbox" onclick="calculateCheck()">
<input type="button" class="btn btn-info" onclick="calculate()" value="Calculate">
> script
<script>
function calculateCheck() {
var check = $('.checkbox').prop('checked');
if (check) {
calculate()
} else {
$('.rateRow').text('');
$('.quantityRow').text('');
$('.totalRow').text('');
}
}
function calculate() {
var rateRow = '';
var quantityRow = '';
var totalRow = '';
var rate = 0;
var quantity = 0;
var total = 0;
// alert(quantitycol);
$('tbody tr').each(function () {
var ratecol = $('td .rate', this).val();
var quantitycol = $('td .quantity', this).val();
var coltotal = ratecol * quantitycol;
$('td .coltolal', this).val(coltotal);
// alert(a);
rate += +$('td .rate', this).val();
quantity += +$('td .quantity', this).val();
total = rate * quantity;
});
rateRow += rate;
quantityRow += quantity;
totalRow = total;
$('.rateRow').text(rateRow);
$('.quantityRow').text(quantityRow);
$('.totalRow').text(totalRow);
}
</script>