角度材料日期选择器格式区域设置 [英] Angular material date picker format locale

问题描述

我创建了一个有角度的材料日期选择器组件以与 formly 一起使用，并尝试将其设置为使用 GB 作为语言环境，以便日期显示为 26/07/2019.但是，在输入日期时，它仍然解析为 US，导致显示无效的日期错误.

我尝试包含 moment 和 MomentDateAdapter 模块，但一直无法解决问题.

这是一个stackblitz

我已经这样设置了我的提供者:

提供者:[{ 提供:LOCALE_ID，useValue:'en-GB' }，{ 提供:DateAdapter，useClass:MomentDateAdapter，deps:[MAT_DATE_LOCALE] }，{ 提供:MAT_DATE_FORMATS，使用值:MAT_MOMENT_DATE_FORMATS }，]

我的组件如下所示:

import { Component, ViewChild } from '@angular/core';从'@angular/forms'导入{FormControl}；从'@ngx-formly/material'导入{FieldType}；从'@angular/material' 导入 { MatInput };import * as _moment from 'moment';//tslint:disable-next-line:no-duplicate-imports从时刻"导入 {default as _rollupMoment}；const 时刻 = _rollupMoment ||_片刻;@成分({选择器:'app-form-datepicker-type'，模板:`<输入垫输入[errorStateMatcher]="errorStateMatcher"[formControl]="formControl"[matDatepicker]="picker"[matDatepickerFilter]="to.datepickerOptions.filter"[formlyAttributes]="字段"><ng-template #matSuffix><mat-datepicker-toggle [for]="picker"></mat-datepicker-toggle></ng-模板><mat-datepicker #picker></mat-datepicker>`，})导出类 DatepickerTypeComponent 扩展 FieldType {//Datepicker 接受 `Moment` 对象而不是 `Date` 对象.date = new FormControl(moment([2017, 0, 1]));}

解决方案

Sam，"key" 使用两个提供程序，"MAT_DATE_FORMAT" 和 DateAdapter 来解析/格式化值

提供者:[{提供:DateAdapter，useClass:CustomDateAdapter}，{提供:MAT_DATE_FORMATS，useValue:MY_FORMATS}，],

如果你使用 DateAdapter MomentDateAdapter 的提供，也注入 MAT_DATE_LOCALE

{provide: DateAdapter, useClass: MomentDateAdapter, deps: [MAT_DATE_LOCALE]}

参见官方文档

但是你也可以使用CustomDateAdapter，它是一个有两个功能的类，格式和解析

export class CustomDateAdapter extends NativeDateAdapter {格式(日期:日期，显示格式:对象):字符串{让结果=date.toDateString();const day = date.getDate();const 月份 = date.getMonth() + 1;const year = date.getFullYear();开关(显示格式){案例'DD/MM/YYYY'://根据您的要求返回格式结果= `${day}-${month}-${year}`;休息;默认:案例'MMM YYYY'://根据您的要求返回格式结果= `${month}-${year}`;休息;}返回结果；}解析(值:字符串):任何{让parts=value.split('/');如果(部分.长度== 3)返回新日期(+parts[2],(+parts[1])-1,+parts[0])}}

参见 stackblitz 中的示例

I have created an angular material date picker component to use with formly, and tried to set it to use GB for the locale so that dates are shown as 26/07/2019. However, when typing in the date, it parses as US still, resulting in invalid date errors being shown.

I have tried to include moment and the MomentDateAdapter module but have been unable to solve the issue.

Here is a stackblitz

I've set my providers like so:

providers: [   
  { provide: LOCALE_ID, useValue: 'en-GB' },
  { provide: DateAdapter, useClass: MomentDateAdapter, deps: [MAT_DATE_LOCALE] },
  { provide: MAT_DATE_FORMATS, useValue: MAT_MOMENT_DATE_FORMATS },
]

and my component looks like this:

import { Component, ViewChild } from '@angular/core';
import { FormControl } from '@angular/forms';
import { FieldType } from '@ngx-formly/material';
import { MatInput } from '@angular/material';

import * as _moment from 'moment';
// tslint:disable-next-line:no-duplicate-imports
import {default as _rollupMoment} from 'moment';

const moment = _rollupMoment || _moment;

@Component({
  selector: 'app-form-datepicker-type',
  template: `
    <input matInput
      [errorStateMatcher]="errorStateMatcher"
      [formControl]="formControl"
      [matDatepicker]="picker"
      [matDatepickerFilter]="to.datepickerOptions.filter"
      [formlyAttributes]="field">
    <ng-template #matSuffix>
      <mat-datepicker-toggle [for]="picker"></mat-datepicker-toggle>
    </ng-template>
    <mat-datepicker #picker></mat-datepicker>
  `,
})
export class DatepickerTypeComponent extends FieldType {
  // Datepicker takes `Moment` objects instead of `Date` objects.
  date = new FormControl(moment([2017, 0, 1]));
}

解决方案

Sam, the "key" are use two providers, "MAT_DATE_FORMAT" and DateAdapter to parse/format the values

providers: [
    {provide: DateAdapter, useClass: CustomDateAdapter},
    {provide: MAT_DATE_FORMATS, useValue: MY_FORMATS},
  ],

If you use as provide of DateAdapter MomentDateAdapter, inject too MAT_DATE_LOCALE

{provide: DateAdapter, useClass: MomentDateAdapter, deps: [MAT_DATE_LOCALE]}

see official docs

But you can also use a CustomDateAdapter, that is a class with two functions, format and parse

export class CustomDateAdapter extends NativeDateAdapter {
   format(date: Date, displayFormat: Object): string {
     let result=date.toDateString();
     const day = date.getDate();
     const month = date.getMonth() + 1;
     const year = date.getFullYear();
     switch (displayFormat)
     {
       case 'DD/MM/YYYY':
         // Return the format as per your requirement
         result= `${day}-${month}-${year}`;
         break;
        default:
       case 'MMM YYYY':
         // Return the format as per your requirement
         result= `${month}-${year}`;
         break;
     }
     return result;
   }
   parse(value:string):any
   {
     let parts=value.split('/');
     if (parts.length==3)
      return new Date(+parts[2],(+parts[1])-1,+parts[0])

   }
 }

See example in stackblitz

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