Angular2 Pipe转换货币 [英] Angular2 Pipe to convert currency

问题描述

我创建了一种使用api转换货币的方法，

I have created a method to convert currency using a api, which looks as follows,

 exchange(Input: string, Output: string, value: number): number {
        let inputRate = this.currencyStorage.getCurrencyRate(cnput);
        let outputputRate = this.currencyStorage.getCurrencyRate(Output);
        return value/ inputRate * outputputRate;
    }

我如何从中创建一个可在整个应用程序中使用的管道转换货币？

How can i create a pipe out of this which can be used throughout the application to convert currency ?

推荐答案

@Pipe({name: 'currConvert'})
export class CurrConvertPipe implements PipeTransform {
  constructor(private currencyStorage:MyCurrencyStorage) {}

  transform(value: number, Input: string, Output: string): number {
    let inputRate = this.currencyStorage.getCurrencyRate(cnput);
    let outputputRate = this.currencyStorage.getCurrencyRate(Output);
    return value/ inputRate * outputputRate;
  }
}

使用模块注册它声明，并像这样使用它

register it with a modules declarations and use it like

{{123 | currConvert:456 /*input*/:789 /*output*/}}

这篇关于Angular2 Pipe转换货币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！