DatePicker

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2023-12-01

md-datepicker是一个Angular Directive，是一个输入控件，用于选择日期并支持ngMessages进行输入验证。

属性 (Attributes)

下表列出了md-datepicker的不同属性的参数和描述。

Sr.No	参数和描述
1	* ng-model 该组件的模型需要一个JavaScript Date对象。
2	ng-change 模型值更改时计算的表达式。
3	md-min-date 表示最小日期（包括）的表达式。
4	md-max-date 表达最大日期（包括）的表达式。
5	md-date-filter 该函数需要一个日期并返回一个布尔值，并确定是否可以选择它。
6	md-placeholder 日期输入占位符值。
7	ng-disabled 这确定是否禁用了日期选择器。
8	ng-required 这确定了datepicker是否需要值。

例子 (Example)

以下示例显示了md-datepicker指令的使用以及datepicker的用法。

am_datepicker.htm

<html lang = "en">
   <head>
      <link rel = "stylesheet"
         href = "https://ajax.googleapis.com/ajax/libs/angular_material/1.0.0/angular-material.min.css">
      <script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
      <script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular-animate.min.js"></script>
      <script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular-aria.min.js"></script>
      <script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular-messages.min.js"></script>
      <script src = "https://ajax.googleapis.com/ajax/libs/angular_material/1.0.0/angular-material.min.js"></script>
      <style>
         .datepickerdemo md-content {
            padding-bottom: 200px; 
         }
        .datepickerdemo .validation-messages {
            font-size: 11px;
            color: darkred;
            margin: 10px 0 0 25px; 
         }
      </style>
      <script language = "javascript">
         angular
            .module('firstApplication', ['ngMaterial','ngMessages'])
            .controller('dateController', dateController);
         function dateController ($scope) {
            $scope.myDate = new Date();
            $scope.minDate = new Date(
               $scope.myDate.getFullYear(),
               $scope.myDate.getMonth() - 2,
               $scope.myDate.getDate());
            $scope.maxDate = new Date(
               $scope.myDate.getFullYear(),
               $scope.myDate.getMonth() + 2,
               $scope.myDate.getDate());
            $scope.onlyWeekendsPredicate = function(date) {
               var day = date.getDay();
               return day === 0 || day === 6;
            }
         }                 
      </script>    
   </head>
   <body ng-app = "firstApplication"> 
      <div class = "datepickerdemo" ng-controller = "dateController as ctrl"
         layout = "column" ng-cloak>
         <md-content>
            <h4>Standard Date Picker</h4>
            <md-datepicker 
               ng-model = "myDate" 
               md-placeholder = "Enter date"></md-datepicker>
            <h4>Disabled Date Picker</h4>
            <md-datepicker 
               ng-model = "myDate" 
               md-placeholder = "Enter date" 
               disabled></md-datepicker>
            <h4>Date-picker with min and max dates</h4>
            <md-datepicker 
               ng-model = "myDate" 
               md-placeholder = "Enter date"
               md-min-date = "minDate" 
               md-max-date = "maxDate"></md-datepicker>
            <h4>Date-picker with only selectable weekends</h4>
            <md-datepicker 
               ng-model = "myDate" 
               md-placeholder = "Enter date"
               md-date-filter = "onlyWeekendsPredicate"></md-datepicker>
            <h4>Date-picker with only selectable weekends in a range</h4>
            <md-datepicker 
               ng-model = "myDate" 
               md-placeholder = "Enter date"
               md-min-date = "minDate" 
               md-max-date = "maxDate"
               md-date-filter = "onlyWeekendsPredicate"></md-datepicker>
            <h4>Date-picker with validation mesages</h4>
            <form name = "myForm">
               <md-datepicker 
                  name = "dateField" 
                  ng-model = "myDate" 
                  md-placeholder = "Enter date"
                  required 
                  md-min-date = "minDate" 
                  md-max-date = "maxDate"
                  md-date-filter = "onlyWeekendsPredicate"></md-datepicker>
               <div class = "validation-messages" ng-messages = "myForm.dateField.$error">
                  <div ng-message = "valid">The entered value is not a date!</div>
                  <div ng-message = "required">This date is required!</div>
                  <div ng-message = "mindate">Date is too early!</div>
                  <div ng-message = "maxdate">Date is too late!</div>
                  <div ng-message = "filtered">Only weekends are allowed!</div>
               </div>
            </form>
         </md-content>
      </div>
   </body>
</html>