具有动态名称的Angular Material 2 Datepicker [英] Angular Material 2 Datepicker with dynamic name

问题描述

我正在尝试使用动态名称实现datepicker组件.

I am trying to implement a datepicker component with a dynamic name.

我正在使用Angular 4在基于Angular Material 2的项目中进行开发，这是我的实现:

I am developing in an Angular Material 2 based project with Angular 4, and this is my implementation:

<input mdInput [mdDatepicker]="'start' + column.name + 'Picker'" placeholder="Start {{column.label}}" formControlName="start{{column.name}}">
<button mdSuffix [mdDatepickerToggle]="'start' + column.name + 'Picker'"></button>
<md-datepicker #start{{column.name}}Picker></md-datepicker>

其中column.name在我的html页面中动态变化.

where column.name changes dynamically in my html page.

在运行时出现此错误:

ERROR TypeError: this._datepicker._registerInput is not a function

您是否知道此错误的原因?

Do you have any idea about the cause of this error?

注意:用mdDatepicker和mdDatepickerToggle属性中的静态值替换column.name可解决此问题，但我的目标是使用动态值运行此代码

Note: Replacing column.name with a static value in the mdDatepicker and mdDatepickerToggle properties solves the problem, but my goal is to run this code with a dynamic value

用mdDatepicker和mdDatepickerToggle属性中的静态值替换column.name只是解决了运行时错误.但是只有在所有内容都是静态的之后，日期选择器才会被触发，这意味着即使md-datepicker中的名称#start{{column.name}}Picker也必须包含静态值

The replacement of column.name with a static value in the mdDatepicker and mdDatepickerToggle properties just solves the runtime error. But the datepicker won't be triggered until everything is static, which means even the name #start{{column.name}}Picker in the md-datepicker has to contain a static value

推荐答案

我相信更好的解决方案是在遍历数组时使用索引

I believe a better solution is to use an index while iterating over the array

 <div *ngFor="let column of columns; let i=index">
   <input mdInput [mdDatepicker]="i" placeholder="Start {{column.label}}" name="{{column.name}}">
   <button mdSuffix [mdDatepickerToggle]="i"></button>
   <md-datepicker #i></md-datepicker>
 </div>

这样，您可以通过元素ref分别访问每个元素

This way you can access each element individually via element ref

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