所谓的选择联动，就是指，当我DateTimePicker1选择2月4号的时候，我DateTimePicker2只能选择2月4号和2月5号两天，当然你可以自行规定要选择的日期。这在一些图表查询条件里面是很常用的一个功能。下面我们就来看看如何设计。

DateTimePicker的选取与使用

在这里，我们使用的DateTimePicker是一个开源的组件，他的model名称为：ui.bootstrap.datetimepicker，我们可以去这个网址找到其相关的内容：http://dalelotts.github.io/angular-bootstrap-datetimepicker/，然后下载其相应的包，最后放到项目中，并进行引用即可(注意不能少了moment.js，它是构建与这个组件的基础上)：

    <!--DateTimePicker Part--><link href="~/Content/front/angular-datetimepicker/css/datetimepicker.css" rel="stylesheet" /><script src="~/Content/front/angular-datetimepicker/js/moment.js"></script><script src="~/Content/front/angular-datetimepicker/js/zh-cn.js"></script><script src="~/Content/front/angular-datetimepicker/js/datetimepicker.js"></script>

然后在module中进行注册：

var app = angular.module('dsBootstrap', ['ui.grid','ui.grid.selection','ui.grid.pagination','ngCookies','ui.bootstrap.datetimepicker']);

最后在HTML页面进行排版布局使用即可：

  <div class="row" ng-show="visible"><div class="col-md-4"><div class="input-group"><span class="input-group-addon" id="basic-addon1">开始时间：</span><div class="dropdown"><a class="dropdown-toggle" id="starttime" role="button" data-toggle="dropdown" data-target="#" href="#"><div class="input-group"><input type="text" class="form-control" data-ng-model="starttime|date:'yyyy-MM-dd' "><span class="input-group-addon"><i class="glyphicon glyphicon-calendar"></i></span></div></a><ul class="dropdown-menu" role="menu" aria-labelledby="dLabel"><datetimepicker data-ng-model="starttime" data-on-set-time="onTimeSet(newDate, oldDate)" data-datetimepicker-config="{ dropdownSelector: '#starttime',startView:'day', minView:'day' }" /></ul></div></div></div><div class="col-md-4"><div class="input-group"><span class="input-group-addon" id="basic-addon1">结束时间：</span><div class="dropdown"><a class="dropdown-toggle" id="endtime" role="button" data-toggle="dropdown" data-target="#" href="#"><div class="input-group"><input type="text" class="form-control" data-ng-model="endtime|date:'yyyy-MM-dd' "><span class="input-group-addon"><i class="glyphicon glyphicon-calendar"></i></span></div></a><ul class="dropdown-menu" id="endContainer" role="menu" aria-labelledby="dLabel"></ul></div></div></div></div>

这样我们就完成了第一步的工作了。从上面的Html代码我们可以看出，starttime和endtime是传递到controller中的所选择的日期值。而且我们的endtime DateTimePicker我们并没有放到前台，我们需要在后台动态生成。为什么呢？因为我们需要根据StartTime的选取值，来计算出endTime的选取范围，所以这里需要动态生成绑定。

DateTimePicker的联动

下面我们开始设计其联动工作。

首先，当选择开始时间后，会进入onTimeSet事件，在这个事件中，我们先动态生成结束时间选择器：

    $scope.onTimeSet = function (newDate, oldDate) {var startTimeFmt = moment($scope.starttime).format("YYYY-MM-DD");var endTimeFmt = moment(startTimeFmt).add(1, 'day').format("YYYY-MM-DD");//时间框置空$("#endtime input").val("");//移除原有的datetimepicker对象$("#endContainer").children().remove();//设置config$scope.config = { dropdownSelector: "#endtime", startView: "day", minView: "day" };//动态编译datetimepicker directivevar compiledeHTML = $compile('<datetimepicker data-ng-model="endtime"  data-before-render="beforeRender($view, $dates, $leftDate, $upDate, $rightDate)" data-datetimepicker-config="{{config}}" />')($scope);//放入html容器$("#endContainer").append(compiledeHTML);}

然后，当上面的方法执行到$compile的时候，就会触发其beforeRender事件，此事件允许在控件加载前，进行一些相关操作。我们利用这个事件，抛出一个days-check事件，以便动态加载时间范围：

    //当选择开始时间，会进入onTimeSet事件，执行到$compile的时候，就会触发下面的beforeRender事件//触发beforeReder事件后，会抛出一个days-check事件出去，并附带所有的当页时间对象。$scope.beforeRender = function ($view, $dates, $leftDate, $upDate, $rightDate) {$timeout(function () {$scope.$broadcast('days-check', $dates);});}

最后，我们接收这个事件：

    //接收事件，并重置页面$scope.$on('days-check', function (e, d) {for (var i = 0; i < d.length; i++) {//初始设置为不可选状态,不选中状态d[i].active = false;d[i].selectable = false;//当前loop的值var currentDate = moment(d[i].utcDateValue).format("YYYY-MM-DD");//当前选定的开始时间var startTimeFmt = moment($scope.starttime).format("YYYY-MM-DD");//允许选定的最大的结束时间var endTimeFmt = moment(startTimeFmt).add(1, 'day').format("YYYY-MM-DD");//比较并设置可选日期if (currentDate >= startTimeFmt && currentDate <= endTimeFmt) {d[i].selectable = true;}}});

当我们收到这个days-check事件的时候，我们会首先重置所有日期为不可选状态，然后根据预先设定的值，来确定选取范围。 这样，通过上面的设置，我们的结束时间就能根据开始时间的选择而进行联动了。是不是很方便呢？最后附上controller总体代码：

app.controller('collectorController', ['$scope', '$cookies', '$timeout','$compile', 'baseService', 'collectorService', 'uiGridConstants', function ($scope, $cookies,$timeout,$compile, baseService, collectorService, uiGridConstants) {var self = this;$scope.ProvinceData = null;$scope.CityData = null;$scope.DistrictData = null;$scope.CompanyData = null;$scope.MachineData = null;$scope.RealTimeData = null;$scope.HistoryData = null;$scope.selectedProvince = null;$scope.selectedCity = null;$scope.selectedDistrict = null;$scope.selectedCompany = null;$scope.selectedMachine = null;$scope.starttime = null;$scope.endtime = null;$scope.visible = false;  //datetimepicker是否显示//art.dialog({ title: '加载提示', icon: 'face-smile', fixed: true,left:'50%',top:0, time:3, content: "日期选择跨度不要过大，否则会因为数据量过大而无法加载图表和列表！", padding: 0 });//监测省份的变化，如果发生了变化，则加载城市列表$scope.$watchCollection('selectedProvince', function (oldval, newval) {$scope.GetCityList();});//监测城市变化，如果发生了变化，则加载地区列表$scope.$watchCollection('selectedCity', function (oldval, newval) {$scope.GetDistrictList();});//监测地区变化，如果发生了变化，则加载公司列表$scope.$watchCollection('selectedDistrict', function (oldval, newval) {$scope.GetCompanyList();});//监测公司变化，如果发生了变化，则加载机器列表$scope.$watchCollection('selectedCompany', function (oldval, newval) {$scope.GetMachineList();});//绑定列表$scope.gridOptions = {enableRowSelection: true,enableSelectAll: false,selectionRowHeaderWidth: 35,rowHeight: 35,showGridFooter: false,multiSelect: true,enablePaginationControls: true,paginationPageSizes: [9, 15, 20],paginationPageSize: 9};$scope.gridOptions.columnDefs = [{ name: 'Param_name', displayName: '参数名称' },{ name: 'Param_unit', displayName: '参数单位' },{ name: 'Param_data', displayName: '参数值' },{ name: 'Param_time', displayName: '采集时间' }];$scope.gridOptions.onRegisterApi = function (gridApi) {$scope.gridApi = gridApi;};//省份绑定collectorService.GetProvinceData().then(function (data) {var flag = data.data.success;if (flag) {$scope.ProvinceData = data.data.data;$scope.selectedProvince = baseService.getSelectedDataMapper($scope.ProvinceData, 'province');}}, null);$scope.GetCityList = function () {var selectedProvinceId;if ($scope.selectedProvince != undefined)selectedProvinceId = $scope.selectedProvince.id;elsereturn;//市区绑定collectorService.GetCityData(selectedProvinceId).then(function (data) {var flag = data.data.success;if (flag) {$scope.CityData = data.data.data;$scope.selectedCity = baseService.getSelectedDataMapper($scope.CityData, 'city');}}, null);}$scope.GetDistrictList = function () {var selectedCityId;if ($scope.selectedCity != undefined)selectedCityId = $scope.selectedCity.id;elsereturn;//区县绑定collectorService.GetDistrictData(selectedCityId).then(function (data) {var flag = data.data.success;if (flag) {$scope.DistrictData = data.data.data;$scope.selectedDistrict = baseService.getSelectedDataMapper($scope.DistrictData, 'district');}}, null);}$scope.GetCompanyList = function () {var selectedDistrictId;if ($scope.selectedDistrict != undefined)selectedDistrictId = $scope.selectedDistrict.id;elsereturn;//公司绑定collectorService.GetCompanyData(selectedDistrictId).then(function (data) {var flag = data.data.success;if (flag) {$scope.CompanyData = data.data.data;$scope.selectedCompany = baseService.getSelectedDataMapper($scope.CompanyData, 'company');}}, null);}$scope.GetMachineList = function () {var selectedCompanyId;if ($scope.selectedCompany != undefined)selectedCompanyId = $scope.selectedCompany.id;elsereturn;//设备绑定collectorService.GetMachineList(selectedCompanyId).then(function (data) {var flag = data.data.success;if (flag) {$scope.MachineData = data.data.data;$scope.selectedMachine = baseService.getSelectedDataMapper($scope.MachineData, 'machine');}}, null);}//获取实时数据$scope.GetRealTimeDataByMachine = function () {timeCheck($scope.starttime, $scope.endtime);var starttimeFmt = timeFmt($scope.starttime);var endtimeFmt = timeFmt($scope.endtime);//获取实时数据var machineId = $scope.selectedMachine.machine_id;collectorService.GetRealDataList(machineId).then(function (data) {var flag = data.data.success;if (flag) {$scope.RealTimeData = data.data.data;}}, null);//获取列表数据collectorService.GetHistoryDataList(machineId,starttimeFmt,endtimeFmt).then(function (data) {var flag = data.data.success;if(flag){$scope.HistoryData = data.data.data;$scope.gridOptions.data = data.data.list;}}, null);//将级联列表项放到cookie中，以便于之后的操作简易化var expireDate = new Date();expireDate.setDate(expireDate.getDate() + 7);delete $cookies['frontselection'];var cookieData = JSON.stringify({province: $scope.selectedProvince,city: $scope.selectedCity,district: $scope.selectedDistrict,company: $scope.selectedCompany,machine: $scope.selectedMachine});$cookies.put('frontselection', cookieData, { 'expires': expireDate });}$scope.ClickToGetParamDataList = function (paramId) {timeCheck($scope.starttime,$scope.endtime);var starttimeFmt = timeFmt($scope.starttime);var endtimeFmt = timeFmt($scope.endtime);var machineId = $scope.selectedMachine.machine_id;collectorService.GetHistoryDataListByParamId(machineId, paramId, starttimeFmt, endtimeFmt).then(function (data) {var flag = data.data.success;if (flag) {$scope.gridOptions.data = data.data.list;}});}//显示隐藏时间段选择$scope.ClickToShowTimePicker = function () {$scope.visible = !$scope.visible;}$scope.onTimeSet = function (newDate, oldDate) {var startTimeFmt = moment($scope.starttime).format("YYYY-MM-DD");var endTimeFmt = moment(startTimeFmt).add(1, 'day').format("YYYY-MM-DD");//时间框置空$("#endtime input").val("");//移除原有的datetimepicker对象$("#endContainer").children().remove();//设置config$scope.config = { dropdownSelector: "#endtime", startView: "day", minView: "day" };//动态编译datetimepicker directivevar compiledeHTML = $compile('<datetimepicker data-ng-model="endtime"  data-before-render="beforeRender($view, $dates, $leftDate, $upDate, $rightDate)" data-datetimepicker-config="{{config}}" />')($scope);//放入html容器$("#endContainer").append(compiledeHTML);}//接收事件，并重置页面$scope.$on('days-check', function (e, d) {for (var i = 0; i < d.length; i++) {//初始设置为不可选状态,不选中状态d[i].active = false;d[i].selectable = false;//当前loop的值var currentDate = moment(d[i].utcDateValue).format("YYYY-MM-DD");//当前选定的开始时间var startTimeFmt = moment($scope.starttime).format("YYYY-MM-DD");//允许选定的最大的结束时间var endTimeFmt = moment(startTimeFmt).add(1, 'day').format("YYYY-MM-DD");//比较并设置可选日期if (currentDate >= startTimeFmt && currentDate <= endTimeFmt) {d[i].selectable = true;}}});//当选择开始时间，会进入onTimeSet事件，执行到$compile的时候，就会触发下面的beforeRender事件//触发beforeReder事件后，会抛出一个days-check事件出去，并附带所有的当页时间对象。$scope.beforeRender = function ($view, $dates, $leftDate, $upDate, $rightDate) {$timeout(function () {$scope.$broadcast('days-check', $dates);});}var timeCheck = function(start,end){if (start == null && end!=null){art.dialog({ title: '提示', icon: 'error', time: 6, content: "必须选择开始日期，请重试！", padding: 0 });return;}if (start!=null && end == null){art.dialog({ title: '提示', icon: 'error', time: 6, content: "必须选择结束日期，请重试！", padding: 0 });return;}if (start != null && end != null && start > end) {art.dialog({ title: '提示', icon: 'error', time: 6, content: "开始时间不能大于结束时间，请重试！", padding: 0 });return;}}var timeFmt = function(time){if (time == null)time = "";elsetime = time.toLocaleDateString();return time;}
}]);