Angular4 svg rect 动态传递值 [英] Angular4 svg rect pass value dynamically

问题描述

我正在构建一个BarsChartComponent"并且我正在使用 svg rect 来显示条形图.我想做的是动态传递宽度值..下面的代码不显示任何结果:

I am building a "BarsChartComponent" and I am using svg rect to display bars. What I am trying to do is to pass width value dynamically.. Code bellow does not display any result:

要显示的组件对象:

items:any=[{Country:"Canada", Value:"1000"}, 
               {Country:"USA", Value:"800"},
               {Country:"Costa Rica", Value:"400"},
               {Country:"Brazil", Value:"500"}];

组件模板:

  <svg class="chart" width="420" height="150" aria-labelledby="title" role="img">
    <ng-template *ngFor="let item of items">
        <rect [attr.width]="item.Value" height="19" y="20"></rect>
    </ng-template>
    </svg> 

我猜是语法错误..欢迎任何帮助！

I guess it is a syntax error.. Any help is welcome!

推荐答案

使用 ng-container 而不是 ng-template

<svg class="chart" width="420" height="150" aria-labelledby="title" role="img"> 
  <ng-container *ngFor="let item of items">
    <rect [attr.width]="item.Value" height="19" y="20"></rect> 
  </ng-container>
</svg>  

演示

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