如何在javascript中计算小计和总计?
我需要什么 我想把所有的加起来和图片一样,但我做不到 如下代码如何将数量乘以单价后的所有金额合计? 这里是Html元素如何在javascript中计算小计和总计?,javascript,jquery,Javascript,Jquery,我需要什么 我想把所有的加起来和图片一样,但我做不到 如下代码如何将数量乘以单价后的所有金额合计? 这里是Html元素 <html> <form> <div> Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit"> Amount: <input type='text' class='a
<html>
<form>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
Total All:<input type="text" class="result">
</form>
</html>
数量:单价:
数量:
数量:单价:
数量:
数量:单价:
数量:
数量:单价:
数量:
数量:单价:
数量:
数量:单价:
数量:
总计所有:
这里是Javascript代码
此js只能根据单价进行合计,数量如下amount=quant*unit
<html>
<form>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
Total All:<input type="text" class="result">
</form>
</html>
结果应为结果=金额+金额1+金额2+金额3+金额4+金额5。但我不能那样做
<script>
$(document).ready(function(){
$('.qty,.unit').on('change', function(){
var qty = parseFloat($('.quant').val() );
var unit = parseFloat( $('.unit_p').val());
var quant1 = parseFloat($('.quant1').val() );
var unit1 = parseFloat( $('.unit1').val());
var quant2 = parseFloat($('.quant2').val() );
var unit2 = parseFloat( $('.unit2').val());
var quant3 = parseFloat($('.quant3').val() );
var unit3 = parseFloat( $('.unit3').val());
var quant4 = parseFloat($('.quant4').val() );
var unit4 = parseFloat( $('.unit4').val());
var quant5 = parseFloat($('.quant5').val() );
var unit5 = parseFloat( $('.unit5').val());
var amount = qty * unit;
var amount1 = quant1*unit1;
var amount2 = quant2*unit2;
var amount3 = quant3*unit3;
var amount4 = quant4*unit4;
var amount5 = quant5*unit5;
var result = [];
if(isNaN(qty) || isNaN(unit)){
$('.amount').val('');
}else{
$('.amount').val(amount);
}if(isNaN(quant1)||isNaN(unit1)){
$('.amount1').val('');
}else{
$('.amount1').val(amount1);
}if(isNaN(quant2) || isNaN(unit2)){
$('.amount2').val('');
}else{
$('.amount2').val(amount2);
}if(isNaN(amount3) || isNaN(amount3)){
$('.amount3').val('');
}else{
$('.amount3').val(amount3);
}if(isNaN(quant4) || isNaN(unit4)){
$('.amount4').val('');
}else{
$('.amount4').val(amount4);
}if(isNaN(quant5)||isNaN(quant5)){
$('.amount5').val('');
}else{
$('.amount5').val(amount5);
}
});
</script>
$(文档).ready(函数(){
$('.qty,.unit')。在('change',function()上{
var qty=parseFloat($('.quant').val());
var unit=parseFloat($('.unit_p').val());
var quant1=parseFloat($('.quant1').val());
var unit1=parseFloat($('.unit1').val());
var quant2=parseFloat($('.quant2').val());
var unit2=parseFloat($('.unit2').val());
var quant3=parseFloat($('.quant3').val());
var unit3=parseFloat($('.unit3').val());
var quant4=parseFloat($('.quant4').val());
var unit4=parseFloat($('.unit4').val());
var quant5=parseFloat($('.quant5').val());
var unit5=parseFloat($('.unit5').val());
var金额=数量*单位;
var amount1=quant1*unit1;
var amount2=quant2*unit2;
var amount3=数量3*unit3;
var amount4=数量4*unit4;
var amount5=数量5*unit5;
var结果=[];
if(isNaN(数量)| isNaN(单位)){
$('.amount').val('');
}否则{
$('.amount').val(金额);
}if(isNaN(quant1)| isNaN(unit1)){
$('.amount1').val('');
}否则{
$('.amount1').val(amount1);
}if(isNaN(quant2)| | isNaN(unit2)){
$('.amount2').val('');
}否则{
$('.amount2').val(amount2);
}if(isNaN(数量3)| | isNaN(数量3)){
$('.amount3').val('');
}否则{
$('.amount3').val(amount3);
}if(isNaN(quant4)| | isNaN(unit4)){
$('.amount4').val('');
}否则{
$('.amount4').val(amount4);
}if(isNaN(quant5)| isNaN(quant5)){
$('.amount5').val('');
}否则{
$('.amount5').val(amount5);
}
});
我不能把所有的金额加起来算作总数
请帮忙
以下内容应该可以使用,您忘记了编写添加代码
$('.quant, .unit_p, .unit1, .unit2, .unit3, .unit4, .unit5, .quant1, .quant2, .quant3, .quant4, .quant5').on('change', function(){
var qty = parseFloat($('.quant').val() );
var unit = parseFloat( $('.unit_p').val());
var quant1 = parseFloat($('.quant1').val() );
var unit1 = parseFloat( $('.unit1').val());
var quant2 = parseFloat($('.quant2').val() );
var unit2 = parseFloat( $('.unit2').val());
var quant3 = parseFloat($('.quant3').val() );
var unit3 = parseFloat( $('.unit3').val());
var quant4 = parseFloat($('.quant4').val() );
var unit4 = parseFloat( $('.unit4').val());
var quant5 = parseFloat($('.quant5').val() );
var unit5 = parseFloat( $('.unit5').val());
var amount = qty * unit;
var amount1 = quant1*unit1;
var amount2 = quant2*unit2;
var amount3 = quant3*unit3;
var amount4 = quant4*unit4;
var amount5 = quant5*unit5;
var result = [];
if(isNaN(qty) || isNaN(unit)){
$('.amount').val('');
}else{
$('.amount').val(amount);
}if(isNaN(quant1)||isNaN(unit1)){
$('.amount1').val('');
}else{
$('.amount1').val(amount1);
}if(isNaN(quant2) || isNaN(unit2)){
$('.amount2').val('');
}else{
$('.amount2').val(amount2);
}if(isNaN(amount3) || isNaN(amount3)){
$('.amount3').val('');
}else{
$('.amount3').val(amount3);
}if(isNaN(quant4) || isNaN(unit4)){
$('.amount4').val('');
}else{
$('.amount4').val(amount4);
}if(isNaN(quant5)||isNaN(quant5)){
$('.amount5').val('');
}else{
$('.amount5').val(amount5);
}
$('.result').val((amount + amount1 + amount2 + amount3 + amount4 + amount5));
});
下面的代码应该可以工作,您忘记了为添加编写代码
$('.quant, .unit_p, .unit1, .unit2, .unit3, .unit4, .unit5, .quant1, .quant2, .quant3, .quant4, .quant5').on('change', function(){
var qty = parseFloat($('.quant').val() );
var unit = parseFloat( $('.unit_p').val());
var quant1 = parseFloat($('.quant1').val() );
var unit1 = parseFloat( $('.unit1').val());
var quant2 = parseFloat($('.quant2').val() );
var unit2 = parseFloat( $('.unit2').val());
var quant3 = parseFloat($('.quant3').val() );
var unit3 = parseFloat( $('.unit3').val());
var quant4 = parseFloat($('.quant4').val() );
var unit4 = parseFloat( $('.unit4').val());
var quant5 = parseFloat($('.quant5').val() );
var unit5 = parseFloat( $('.unit5').val());
var amount = qty * unit;
var amount1 = quant1*unit1;
var amount2 = quant2*unit2;
var amount3 = quant3*unit3;
var amount4 = quant4*unit4;
var amount5 = quant5*unit5;
var result = [];
if(isNaN(qty) || isNaN(unit)){
$('.amount').val('');
}else{
$('.amount').val(amount);
}if(isNaN(quant1)||isNaN(unit1)){
$('.amount1').val('');
}else{
$('.amount1').val(amount1);
}if(isNaN(quant2) || isNaN(unit2)){
$('.amount2').val('');
}else{
$('.amount2').val(amount2);
}if(isNaN(amount3) || isNaN(amount3)){
$('.amount3').val('');
}else{
$('.amount3').val(amount3);
}if(isNaN(quant4) || isNaN(unit4)){
$('.amount4').val('');
}else{
$('.amount4').val(amount4);
}if(isNaN(quant5)||isNaN(quant5)){
$('.amount5').val('');
}else{
$('.amount5').val(amount5);
}
$('.result').val((amount + amount1 + amount2 + amount3 + amount4 + amount5));
});
您需要将html更改为:
<html>
<form>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
Total All:<input type="text" class="result">
</form>
</html>
您需要将html更改为:
<html>
<form>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
<div>
Quantity:<input type="text" class="qty"> Unit price:<input type="text" class="unit">
Amount: <input type='text' class='amount'>
</div>
Total All:<input type="text" class="result">
</form>
</html>
将类添加到
subTotal
的所有第3列输入字段中。然后,只需编写一个函数即可完成此任务
var calculateTotal = function() {
var total = 0;
$.each($('.subTotal'), function(index, element) {
total += $(element).val();
});
return total;
};
然后编写一个函数来设置元素的值
var updateTotal = function () {
$('#grandTotal').val(calculateTotal());
}
现在,每当用户修改导致总数改变的任何值时,您都可以触发
updateTotal()
方法。向subTotal
的所有第三列输入字段添加一个类。然后,只需编写一个函数即可完成此任务
var calculateTotal = function() {
var total = 0;
$.each($('.subTotal'), function(index, element) {
total += $(element).val();
});
return total;
};
然后编写一个函数来设置元素的值
var updateTotal = function () {
$('#grandTotal').val(calculateTotal());
}
现在,每当用户修改导致总数变化的任何值时,您都可以触发
updateTotal()
方法。另一种方法将通过该方法完成
每当用户在更改事件中输入数量/单位时,将计算并设置金额值
稍后调用fnalltoal()
函数,用totalAmount更新结果文本框
$(".qty").on('input', function () {
var self = $(this);
var unitVal = self.next().val();
self.next().next().val(unitVal * self.val());
fnAlltotal();
});
$(".unit").on('input', function () {
var self = $(this);
var qtyVal = self.prev().val();
self.next().val(qtyVal * self.val());
fnAlltotal();
});
function fnAlltotal() {
var total = 0
$(".amount").each(function () {
total += parseFloat($(this).val() || 0);
});
$(".result").val(total);
}
另一种方法将通过此 每当用户在更改事件中输入数量/单位时,将计算并设置金额值 稍后调用
fnalltoal()
函数,用totalAmount更新结果文本框
$(".qty").on('input', function () {
var self = $(this);
var unitVal = self.next().val();
self.next().next().val(unitVal * self.val());
fnAlltotal();
});
$(".unit").on('input', function () {
var self = $(this);
var qtyVal = self.prev().val();
self.next().val(qtyVal * self.val());
fnAlltotal();
});
function fnAlltotal() {
var total = 0
$(".amount").each(function () {
total += parseFloat($(this).val() || 0);
});
$(".result").val(total);
}
您似乎还没有编写用于进行总计的代码。您可以通过简单地包装每一行并在所有行中循环来大幅减少代码。将所有类似字段设置为相同的类别(价格、数量、小计)我猜你的问题在于,在某些情况下,你试图累加的
amountX
变量可能不包含数字。既然你已经对其进行了检查,我建议将amountX
变量添加到result
中,位置与你设置输入字段值的位置相同你还没有写过做总计的代码,你可以通过简单地包装每一行并在所有行中循环来大幅减少代码。给所有类似的字段设置相同的类(价格、数量、小计)我猜您的问题在于,在某些情况下,您试图相加的amountX
变量可能不包含数字。由于您已经对其进行了检查,我建议将amountX
变量添加到result
中,位置与您设置输入字段值的位置相同。这不是一个问题回答。没有解释,没有评论,只有一大串代码。这不是答案。没有解释,没有评论,只有一大串代码$Marcus,如果我输入所有单位和数量,如果我没有输入所有单位和数量的值,它会起作用