table 表格自动计算

页面样式

页面代码

<table class="table table-bordered table-hover dataTable" id="tabelList">
                        <thead>
                            <tr class="firstRow">
                                <td>名称</td>
                                <td>规格/型号</td>
                                <td>生产单位</td>
                                <td>供货单位</td>
                                <td>订购数量</td>
                                <td>单价</td>
                                <td>小计</td>
                                <td>操作</td>
                            </tr>
                        </thead>
                        <tbody id="ListView">
                            <tr>
                                <td>
                                    <input class="text-center form-control"  type="text" />
                                </td>
                                <td>
                                    <input class="text-center form-control"  type="text" />
                                </td>
                                <td>
                                    <input class="text-center form-control"  type="text" />
                                </td>
                                <td>
                                    <input class="text-center form-control" type="text"/>
                                </td>
                                <td>
                                    <input class="text-center form-control txtQuantity "  type="text"  />
                                </td>
                                <td>
                                    <input class="text-center form-control txtPrice"  type="text"  />
                                </td>
                                <td>
                                    <input class="text-center form-control txtAmount"  type="text"  />
                                </td>
                                <td onclick="deleteRow(this)"><button type="button" class="btn btn-danger waves-effect">删除</button></td>
                            </tr>
                        </tbody>
                        <tfoot>
                            <tr>
                                <td colspan="5" style="text-align:right;">总计</td>
                                <td colspan="3"><span id="total"></span></td>
                            </tr>
                        </tfoot>
                    </table>
                    <button type="button" onclick="AddList()" class="btn btn-success waves-effect">添加一行</button>

js代码

function CalcSum() {
            var total_sum = 0;
            $("#tabelList .txtAmount").each(function () {
                var val = $(this).val();
                if ($.isNumeric(val)) {
                    total_sum += parseFloat(val);
                }
            });
            $("#total").html(total_sum);
            $("#TotalMoney").val(total_sum);
        }
　　　　　///数量列任何一个文件框数据变化事件
        $("#tabelList").on('input', '.txtQuantity', function () {
            var self = $(this);
            var tr = self.closest("tr");

            var quantity = self.val();
            var Price = tr.find(".txtPrice").val();

            var amount = 0
            if ($.isNumeric(quantity) && $.isNumeric(Price)) {
                amount = quantity * Price;
            }
            tr.find(".txtAmount").val(amount);

            CalcSum();
        });
　　　　///价格列任何一个文件框变化事件
        $("#tabelList").on('input', '.txtPrice', function () {
            var self = $(this);
            var tr = self.closest("tr");

            var quantity = tr.find(".txtQuantity").val();
            var Price = self.val();

            var amount = 0
            if ($.isNumeric(quantity) && $.isNumeric(Price)) {
                amount = quantity * Price;
            }
            tr.find(".txtAmount").val(amount);
            CalcSum();
        });
 　　　　///删除一行
        function deleteRow(obj) {
            var index = obj.parentNode.rowIndex;
            var table = document.getElementById("tabelList");
            table.deleteRow(index);
            CalcSum();
        }
        ///添加一行
        function AddList() {
            var html = '<tr>' +
                        '<td>' +
                        '<input class="text-center form-control"  type="text" />' +
                        '</td>' +
                        '<td>' +
                        '<input class="text-center form-control" type="text"/>' +
                        '</td>' +
                        '<td>' +
                        '<input class="text-center form-control"  type="text"  />' +
                        '</td>' +
                        '<td>' +
                        '<input class="text-center form-control"  type="text"/>' +
                        '</td>' +
                        '<td>' +
                        '<input class="text-center form-control txtQuantity"  type="text"  />' +
                        '</td>' +
                        '<td>' +
                        '<input class="text-center form-control txtPrice"  type="text"   />' +
                        '</td>' +
                        '<td>' +
                        '<input class="text-center form-control txtAmount"  type="text"  />' +
                        '</td>' +
                        '<td  onclick="deleteRow(this)"><button type="button" class="btn btn-danger waves-effect">删除</button></td>'+
                        '</tr>';
            $("#tabelList").append(html);
        };