代码：

  1.  function Product(ProductID,ProductName,ProductNum,Result,Price) {
  2.         this.ProductID = ko.observable(ProductID);
  3.         this.ProductName = ko.observable(ProductName);
  4.         this.ProductNum = ko.observable(ProductNum);
  5.         this.Result = ko.observable(Result);
  6.         this.Price = ko.observable(Price);
  7.     }
  1.  self.add = function (o) {
  2.             self.isDetail(true);
  3.             self.selectedItem(new Sale());
  4.             $.ajax({
  5.                 url: "/api/CommonApi?API=GetProductListByBuy",
  6.                 type: "get",
  7.                 dataType: "json",
  8.                 success: function (data) {
  9.                     var list = data.ApiParamObj;
  10.                     var arr = [];
  11.                     $(list).each(function () {
  12.                         var ProductNum = $(this)[].ProductNum;
  13.                         var Result = $(this)[].Result;
  14.                         var Price = $(this)[].Price;
  15.                         var ProductID = $(this)[].ProductID;
  16.                         var ProductName = $(this)[].ProductName;
  17.                         //console.log(Price);
  18.                         //self.ProductList().push(new Product(ProductNum, Result, Price));
  19.                         arr.push(new Product(ProductID, ProductName, ProductNum, Result, Price));
  20.                         //self.ProductList.push(new Product(ProductID, ProductName, ProductNum, Result, Price));
  21.                     })
  22.                     //console.dir(arr);
  23.                     self.ProductList(arr);
  24.                     //self.ProductList = ko.observableArray(arr);
  25.  
  26.                     //console.log(self.ProductList().length);
  27.                     //console.dir(self.ProductList());
  28.                 }
  29.             });
  30.             $("#formDialog").valid();
  31.         }

对每一个属性进行监控，组成数组对整个数组进行监控

计算总数量，总金额

  1. self.TotalNum = ko.computed(function () {
  2.             //console.log("ffff");
  3.             //console.dir(self.ProductList());
  4.             var total = ;
  5.             ko.utils.arrayForEach(self.ProductList(), function (item) {
  6.                 if (item.Result()) {
  7.                     var value = parseFloat(item.ProductNum());
  8.                     if (!isNaN(value)) {
  9.                         total += value;
  10.                     }
  11.                 }
  12.             });
  13.             return total.toFixed();
  14.         });
  15.         self.TotalAmount = ko.computed(function () {
  16.             var total = ;
  17.             ko.utils.arrayForEach(self.ProductList(), function (item) {
  18.                 if (item.Result()) {
  19.                     var value = parseFloat(item.ProductNum() * item.Price());
  20.                     if (!isNaN(value)) {
  21.                         total += value;
  22.                     }
  23.                 }
  24.             });
  25.             return total.toFixed();
  26.         })

html代码：

  1.   <div class="row">
  2.                             <div class="form-group col-xs-12">
  3.                                 <label class="control-label col-md-2">产品:</label>
  4.                                 <div class="col-md-10" data-bind="visible: ProductList().length > 0,foreach:ProductList">
  5.                                     <div class="dvcls">
  6.                                         <input type="checkbox" class="chk" data-bind="checked:Result,value:ProductID,attr:{ name: $index },enable:$parent.isDetail" />
  7.                                         <span data-bind="text:ProductName"></span>
  8.                                         &nbsp;&nbsp;价格：<span data-bind="text:Price"></span>
  9.                                         &nbsp;&nbsp;<input type="number" style="width:40px" min="" data-bind="value:ProductNum,valueUpdate:'keyup',visible:Result,enable:$parent.isDetail" />
  10.                                     </div>
  11.                                 </div>
  12.                             </div>
  13.                         </div>

效果图：

整个代码：

  1. @{
  2.     Model.Scripts = new string[] {
  3.         "~/Scripts/paginationViewModel.js",
  4.         "/Views/BoxSale/BoxSale.js" };
  5. }
  6. <style type="text/css">
  7.     .dvcls{
  8.         display:inline-block;
  9.         width:290px;
  10.         padding-left:0px;
  11.     }
  12.  
  13. </style>
  14. <div class="page-content" style="padding-top: 0;">
  15.     <!-- BEGIN PAGE CONTENT-->
  16.     <div class="row">
  17.         <div class="col-md-12">
  18.             <!-- BEGIN EXAMPLE TABLE PORTLET-->
  19.             <div class="portlet box blue-hoki" style="background-color: white">
  20.                 <div class="portlet-title">
  21.                     <div class="caption" style="font-weight:bold;margin:10px;">
  22.                         销售记录
  23.                     </div>
  24.                     <div class="tools"></div>
  25.                 </div>
  26.  
  27.                 <div class="portlet-body">
  28.  
  29.                     <a href="javascript:void(0)" class="label label-info" style="margin:10px;" data-toggle="modal" data-target="#dvDialog" data-bind="click:add">销售礼品</a>
  30.                     <table class="table table-striped table-bordered table-hover" id="tblCompany" style="margin:10px; text-align: center;">
  31.                         <thead>
  32.                             <tr style="background-color:#00adef">
  33.                                 <th>
  34.                                     序号
  35.                                 </th>
  36.                                 <th>
  37.                                     客户
  38.                                 </th>
  39.                                 <th>
  40.                                     礼品数量
  41.                                 </th>
  42.                                 <th>
  43.                                     总金额
  44.                                 </th>
  45.                                 <th>
  46.                                     编辑
  47.                                 </th>
  48.                             </tr>
  49.                         </thead>
  50.                         <tbody data-bind="visible: SaleList().length > 0,foreach: SaleList">
  51.                             <tr>
  52.                                 <td data-bind="text:$index()+1"></td>
  53.                                 <td data-bind="text:Name"></td>
  54.                                 <td data-bind="text:Num"></td>
  55.                                 <td data-bind="text:Amount.toFixed(2)"></td>
  56.                                 <td>
  57.                                     <a class="label label-info" data-toggle="modal" data-target="#dvDialog" data-bind="click:$parent.edit">查看</a>
  58.                                     <a class="label label-info" data-bind="click:$parent.remove">删除</a>
  59.                                 </td>
  60.                             </tr>
  61.                         </tbody>
  62.                     </table>
  63.                     <div class="row  datatables_paginate paging_full_numbers" style="text-align:center;" data-bind="visible: pages().length > 0">
  64.                         <div class="small-12 columns" data-bind="template: 'PaginationTemplate'"></div>
  65.                     </div>
  66.                 </div>
  67.  
  68.             </div>
  69.             <!-- END EXAMPLE TABLE PORTLET-->
  70.         </div>
  71.     </div>
  72.  
  73.     <!-- 编辑公司  -->
  74.     <div class="modal fade bs-example-modal-lg" tabindex="-1" id="dvDialog" role="dialog" aria-hidden="true">
  75.         <div class="modal-dialog modal-lg" style="margin-top:10%">
  76.             <div class="modal-content" style="width:860px">
  77.                 <div class="modal-header">
  78.                     <button type="button" class="close" data-dismiss="modal" aria-hidden="true"></button>
  79.                     <h4 class="modal-title" style="margin-left:4%;color:#00adef">
  80.                         <i class="icon-docs" style="font-size: 24px;"></i>
  81.                         <span data-bind="if:selectedItem().SaleRecordID==null">新建</span>
  82.                         <span data-bind="if:selectedItem().SaleRecordID!=null">查看</span>
  83.                     </h4>
  84.                 </div>
  85.                 <div class="modal-body" style="border-top: 1px solid #EFEFEF; width: 90%;margin-left:5%">
  86.                     <form id="formDialog" name="formDialog" class="form-horizontal">
  87.                         <div class="row">
  88.                             <div class="form-group col-xs-12">
  89.                                 <label class="control-label col-md-2">客户:</label>
  90.                                 <div class="col-md-10">
  91.                                     <select class="form-control" required name="fCustomerID" data-bind="options:customersList,optionsCaption: '请选择客户',
  92.                                                                             optionsText:function(item){ return item.NameMobile},
  93.                                                                             optionsValue:function(item){ return item.ID },
  94.                                                                             value:selectedItem().CustomerID,enable:isDetail"></select>
  95.                                 </div>
  96.                             </div>
  97.                         </div>
  98.                     </form>
  99.                         <div class="row">
  100.                             <div class="form-group col-xs-12">
  101.                                 <label class="control-label col-md-2">产品:</label>
  102.                                 <div class="col-md-10" data-bind="visible: ProductList().length > 0,foreach:ProductList">
  103.                                     <div class="dvcls">
  104.                                         <input type="checkbox" class="chk" data-bind="checked:Result,value:ProductID,attr:{ name: $index },enable:$parent.isDetail" />
  105.                                         <span data-bind="text:ProductName"></span>
  106.                                         &nbsp;&nbsp;价格：<span data-bind="text:Price"></span>
  107.                                         &nbsp;&nbsp;<input type="number" style="width:40px" min="" data-bind="value:ProductNum,valueUpdate:'keyup',visible:Result,enable:$parent.isDetail" />
  108.                                     </div>
  109.                                 </div>
  110.                             </div>
  111.                         </div>
  112.                     <div class="row">
  113.                         <div class="form-group col-xs-12">
  114.                             <label class="control-label col-md-2">总数:</label>
  115.                             <div class="col-md-4">
  116.                                 <span data-bind="text:TotalNum"></span>
  117.                             </div>
  118.                             <label class="control-label col-md-2">总金额:</label>
  119.                             <div class="col-md-4">
  120.                                 <span data-bind="text:TotalAmount"></span>
  121.                             </div>
  122.                         </div>
  123.                     </div>
  124.                     <div class="modal-footer" data-bind="visible:isDetail">
  125.                         <button style="width: 42%;" type="button" class="btn blue" data-bind="click:function(){save();}">
  126.                             确定
  127.                         </button>
  128.                         <button style="width: 42%;" type="button" class="btn blue" data-dismiss="modal">取消</button>
  129.                     </div>
  130.                 </div>
  131.             </div>
  132.         </div>
  133.     </div>
  134. </div>
  135.  
  136. <script type="text/html" id="PaginationTemplate">
  137.     <ul class="pagination" data-bind="visible: pages().length > 0">
  138.         <li><a data-bind="click: goToFirst"><<</a></li>
  139.         <li><a data-bind="click: goToPrev"><</a></li>
  140.         <!--ko if:showStartPagerDot-->
  141.         <li><a data-bind="click:StartPageDot">...</a></li>
  142.         <!--/ko-->
  143.         <!--ko foreach:pages-->
  144.         <li data-bind="css: { 'active': $data == $parent.currentPage() }">
  145.             <a data-bind="text: $data, click: $parent.goToPage.bind($data, $data)"></a>
  146.         </li>
  147.         <!--/ko-->
  148.         <!--ko if:showEndPagerDot-->
  149.         <li><a data-bind="click:EndPageDot">...</a></li>
  150.         <!--/ko-->
  151.         <li><a data-bind="click: goToNext">></a></li>
  152.         <li><a data-bind="click: goToLast">>></a></li>
  153.     </ul>
  154. </script>
  1. $(function () {
  2.     Date.prototype.Format = function (fmt) {
  3.         var o = {
  4.             "M+": this.getMonth() + , //月份
  5.             "d+": this.getDate(), //日
  6.             "h+": this.getHours() %  ==  ?  : this.getHours() % , //小时
  7.             "H+": this.getHours(),
  8.             "m+": this.getMinutes(), //分
  9.             "s+": this.getSeconds(), //秒
  10.             "q+": Math.floor((this.getMonth() + ) / ), //季度
  11.             "f": this.getMilliseconds() //毫秒
  12.         };
  13.         if (/(y+)/.test(fmt))
  14.             fmt = fmt.replace(RegExp.$, (this.getFullYear() + "").substr( - RegExp.$.length));
  15.         for (var k in o)
  16.             if (new RegExp("(" + k + ")").test(fmt))
  17.                 fmt = fmt.replace(RegExp.$, (RegExp.$.length == ) ? (o[k]) : (("" + o[k]).substr(("" + o[k]).length)));
  18.         return fmt;
  19.     }
  20.     function GetNow() {
  21.         return new Date().Format("yyyy-MM-dd HH:mm:ss");
  22.     }
  23.     function Guid() {
  24.         var guid = "";
  25.         for (var i = ; i <= ; i++) {
  26.             var n = Math.floor(Math.random() * 16.0).toString();
  27.             guid += n;
  28.             if ((i == ) || (i == ) || (i == ) || (i == ))
  29.                 guid += "-";
  30.         }
  31.         return guid;
  32.     }
  33.  
  34.     var isT = false;
  35.     var isS = false;
  36.     function Product(ProductID,ProductName,ProductNum,Result,Price) {
  37.         this.ProductID = ko.observable(ProductID);
  38.         this.ProductName = ko.observable(ProductName);
  39.         this.ProductNum = ko.observable(ProductNum);
  40.         this.Result = ko.observable(Result);
  41.         this.Price = ko.observable(Price);
  42.     }
  43.     function Sale() {
  44.         this.SaleRecordID = null;
  45.         this.CustomerID = "";
  46.         this.Name = "";
  47.         this.Amount = ;
  48.         this.Num = ;
  49.     }
  50.     var model = function () {
  51.         var self = this;
  52.         self.ProductList = ko.observableArray([]);
  53.         self.selectedItem = ko.observable();
  54.         self.customersList = ko.observableArray();
  55.         self.SaleList = ko.observableArray();
  56.         self.isDetail = ko.observable(true);
  57.         self.remove = function (o) {
  58.             Confirm('你确定要删除该记录吗？').on(function () {
  59.                 var data = {
  60.                     SaleRecordID: o.SaleRecordID,
  61.                     UpdateTime: GetNow(),
  62.                     UpdateBy: $User.UserID,
  63.                     IsDelete:
  64.                 };
  65.                 $.ajax({
  66.                     url: "/api/CommonApi?API=DelSale",
  67.                     type: "put",
  68.                     data: { ApiParamObj: JSON.stringify(data) },
  69.                     dataType: "json",
  70.                     success: function (data) {
  71.                         if (data.Success) {
  72.                             Alert("删除成功").on(function () {
  73.                                 self.goToPage();
  74.                             })
  75.                         }
  76.                     }
  77.                 });
  78.             });
  79.         }
  80.         self.add = function (o) {
  81.             self.isDetail(true);
  82.             self.selectedItem(new Sale());
  83.             $.ajax({
  84.                 url: "/api/CommonApi?API=GetProductListByBuy",
  85.                 type: "get",
  86.                 dataType: "json",
  87.                 success: function (data) {
  88.                     var list = data.ApiParamObj;
  89.                     var arr = [];
  90.                     $(list).each(function () {
  91.                         var ProductNum = $(this)[].ProductNum;
  92.                         var Result = $(this)[].Result;
  93.                         var Price = $(this)[].Price;
  94.                         var ProductID = $(this)[].ProductID;
  95.                         var ProductName = $(this)[].ProductName;
  96.                         //console.log(Price);
  97.                         //self.ProductList().push(new Product(ProductNum, Result, Price));
  98.                         arr.push(new Product(ProductID, ProductName, ProductNum, Result, Price));
  99.                         //self.ProductList.push(new Product(ProductID, ProductName, ProductNum, Result, Price));
  100.                     })
  101.                     //console.dir(arr);
  102.                     self.ProductList(arr);
  103.                     //self.ProductList = ko.observableArray(arr);
  104.  
  105.                     //console.log(self.ProductList().length);
  106.                     //console.dir(self.ProductList());
  107.                 }
  108.             });
  109.             $("#formDialog").valid();
  110.         }
  111.         self.TotalNum = ko.computed(function () {
  112.             //console.log("ffff");
  113.             //console.dir(self.ProductList());
  114.             var total = ;
  115.             ko.utils.arrayForEach(self.ProductList(), function (item) {
  116.                 if (item.Result()) {
  117.                     var value = parseFloat(item.ProductNum());
  118.                     if (!isNaN(value)) {
  119.                         total += value;
  120.                     }
  121.                 }
  122.             });
  123.             return total.toFixed();
  124.         });
  125.         self.TotalAmount = ko.computed(function () {
  126.             var total = ;
  127.             ko.utils.arrayForEach(self.ProductList(), function (item) {
  128.                 if (item.Result()) {
  129.                     var value = parseFloat(item.ProductNum() * item.Price());
  130.                     if (!isNaN(value)) {
  131.                         total += value;
  132.                     }
  133.                 }
  134.             });
  135.             return total.toFixed();
  136.         })
  137.  
  138.         self.edit = function (o) {
  139.             self.isDetail(false);
  140.             self.selectedItem(o);
  141.             $.ajax({
  142.                 url: "/api/CommonApi?API=GetBoxSaleRecordBySaleRecordID",
  143.                 type: "get",
  144.                 data:{"SaleRecordID":o.SaleRecordID},
  145.                 dataType: "json",
  146.                 success: function (data) {
  147.                     var list = data.ApiParamObj;
  148.                     var arr = [];
  149.                     $(list).each(function () {
  150.                         var ProductNum = $(this)[].ProductNum;
  151.                         var Result = ;
  152.                         var Price = $(this)[].Price;
  153.                         var ProductID = $(this)[].ProductID;
  154.                         var ProductName = $(this)[].ProductName;
  155.                         arr.push(new Product(ProductID, ProductName, ProductNum, Result, Price));
  156.                     })
  157.                     self.ProductList(arr);
  158.                 }
  159.             });
  160.             console.dir(self);
  161.         }
  162.         self.insertRecord = function (guid) {
  163.             ko.utils.arrayForEach(self.ProductList(), function (item) {
  164.                 if (item.Result()) {
  165.                     var data = {};
  166.                     data.ProductID = item.ProductID();
  167.                     data.SaleRecordID = guid;
  168.                     data.Num = item.ProductNum();
  169.                     data.Price = item.Price();
  170.                     data.IsDelete = ;
  171.                     data.CreateBy = $User.UserID;
  172.                     data.UpdateBy = $User.UserID;
  173.                     data.CreateTime = GetNow();
  174.                     data.UpdateTime = GetNow();
  175.                     $.ajax({
  176.                         url: "/api/CommonApi?API=InsertBoxSaleRecord",
  177.                         type: "post",
  178.                         data: { ApiParamObj: JSON.stringify(data) },
  179.                         dataType: "json",
  180.                         success: function (data) {
  181.                             //console.dir(data);
  182.                             //if (data.Success) {
  183.                             //    Alert("添加成功！").on(function () {
  184.                             //        self.Refresh();
  185.                             //        $('#dvDialog').modal('hide');
  186.                             //        isS = false;
  187.                             //    })
  188.                             //}
  189.                         }
  190.                     });
  191.                 }
  192.             });
  193.         }
  194.         self.save = function () {
  195.             $("#formDialog").valid();
  196.             var arr = self.ProductList();
  197.             var guid = Guid();
  198.             var o = self.selectedItem();
  199.             if ($("#formDialog").valid()) {
  200.                 if (!isS) {
  201.                     isS = true;
  202.                     var data = {
  203.                         SaleRecordID: guid,
  204.                         Amount: self.TotalAmount(),
  205.                         CustomerID: self.selectedItem().CustomerID,
  206.                         Num: self.TotalNum(),
  207.                         IsDelete: ,
  208.                         CreateBy: $User.UserID,
  209.                         UpdateBy: $User.UserID,
  210.                         CreateTime: GetNow(),
  211.                         UpdateTime: GetNow()
  212.                     };
  213.  
  214.                     $.ajax({
  215.                         url: "/api/CommonApi?API=InsertSale",
  216.                         type: "post",
  217.                         data: { ApiParamObj: JSON.stringify(data) },
  218.                         dataType: "json",
  219.                         success: function (data) {
  220.                             self.insertRecord(guid);
  221.                             if (data.Success) {
  222.                                 Alert("添加成功！").on(function () {
  223.                                     self.Refresh();
  224.                                     $('#dvDialog').modal('hide');
  225.                                     isS = false;
  226.                                 })
  227.                             }
  228.                         }
  229.                     });
  230.  
  231.                 }
  232.             }
  233.         }
  234.         self.Refresh = function (pageIndex) {
  235.             //this.pageSize = 10;
  236.             if (pageIndex == undefined)
  237.                 pageIndex = ;
  238.             var data = {};
  239.             data.API = "GetSaleList";
  240.             data.PageSize = self.pageSize;
  241.             data.PageIndex = pageIndex;
  242.             $.ajax({
  243.                 url: "/api/CommonApi",
  244.                 type: "get",
  245.                 data: data,
  246.                 dataType: "json",
  247.                 success: function (datas) {
  248.                     var list = datas.ApiParamObj;
  249.                     self.SaleList(list);
  250.                     if (list.length == ) {
  251.                         self.total();
  252.                     } else {
  253.                         self.total(list[].TotalCount);
  254.                     }
  255.                     self.caculatePages();
  256.                     return datas;
  257.                 }
  258.             });
  259.         }
  260.     }
  261.     var vm = new model();
  262.     paginationViewModel.call(vm, );
  263.     vm.caculatePages();
  264.     vm.goToPage();
  265.     vm.selectedItem(new Product());
  266.     ko.applyBindings(vm);
  267.  
  268.     //获取客户列表
  269.     var getCustomersList = function () {
  270.         $.getJSON('/api/commonapi?API=GetCustomerUsedCarUse', function (data) {
  271.             if (data.Success) {
  272.                 vm.customersList(data.ApiParamObj);
  273.             }
  274.         });
  275.     };
  276.     getCustomersList();
  277. });

http://knockout.com.cn/topic/55cf6552829c6622973d7e40

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