Angular 5-CurrencyPipe [英] Angular 5 - currencyPipe

问题描述

我对Angular中已内置的CurrencyPipe遇到问题.

I have a problem with the already built in CurrencyPipe from Angular.

我需要使用CurrencyPipe显示货币符号，但是除非提供输入数字，否则我将无法使用它.

I need to display a currency sign using the CurrencyPipe but I can't use it unless I provide an input number.

因为CurrencyPipe使用当前语言环境来获取货币符号，所以我认为输入数字可能是可选的.

Because the CurrencyPipe uses the current locale to get the currency sign, I was thinking that the input number could be optional.

当前行为:

{{ 1 | currency:'USD' }} --> $1

所需的行为:

{{ null | currency:'USD' }} --> $

您是否知道默认管道是否可以做到这一点? 谢谢！

Does any of you know if this is possible with the default Pipe? Thanks!!

推荐答案

更新Angular 8

import { Pipe, PipeTransform } from '@angular/core';
import { CurrencyPipe } from '@angular/common';

@Pipe({ name: 'CustomeCurrency' })
export class CustomCurrencyPipe implements PipeTransform {

    constructor(private currencyPipe: CurrencyPipe) { }
    transform(value: any, currencyCode?: string, display?: string | boolean, digitsInfo?: string, locale?: string): string {
        if (value != null)
            return this.currencyPipe.transform(value, currencyCode, display, digitsInfo, locale);
        return this.currencyPipe.transform(0, currencyCode, display, locale).split('0.00')[0];
    }
}

---

尝试使用这个简单的自定义货币管道

---

Try this simple custom currency pipe

{{ null | CustomeCurrency }}</p>

import { Pipe, PipeTransform } from '@angular/core';
import { CurrencyPipe } from '@angular/common';
@Pipe({ name: 'CustomeCurrency' })
export class CustomCurrencyPipe implements PipeTransform {

constructor(private currencyPipe: CurrencyPipe) { }

transform(value: any, currency: string, symbol: boolean = false): string {
     if (value != null)
        return this.currencyPipe.transform(value, currency, symbol);
    return this.currencyPipe.transform(0, currency, symbol).split('0.00')[0];
 }
}

这篇关于Angular 5-CurrencyPipe的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！