将 html ngModel 值传递给服务 Angular

Question

我想传递一个 html ngModel 值它位于 Combocomponent.html 上，连接到名为 Home.service.ts 的服务。

在服务内部，我有以下代码：

  configUrl1 = 'https://localhost:44361/api/Active_Serviced_Outlets?Year=2021&quarter=1&month=1';
  getMethod1() {
    
    return this.http.get(this.configUrl1);
  }  

我想动态地将 [(ngModel)]="selectedYear" 值传递给选定的年份，以便每次用户输入年份时。

ComboComponent.html

<div class="row">
  <div class="column">

    <p> &nbsp; &nbsp;<b>Year </b></p>

    <kendo-dropdownlist [data]="year" [(ngModel)]="selectedYear"></kendo-dropdownlist>
  </div>
  <div class="column">

    <p> &nbsp; &nbsp;<b>Month</b></p>
    <kendo-dropdownlist [data]="Month" [(ngModel)]="selectedMonth"> </kendo-dropdownlist>
  </div>
  <div class="columnA">
    <p> &nbsp; &nbsp;<b>Quarter</b></p>
    <kendo-dropdownlist style=" width: 92%;" [data]="Quarter" [(ngModel)]="selectedQuarter"> </kendo-dropdownlist>
  </div>

   
</div>
<br />
<!--<div class="example-config">
  &nbsp; &nbsp;Selected Values: {{selectedYear}} &nbsp; &nbsp; {{selectedMonth}} &nbsp; &nbsp; {{selectedQuarter}}
</div>-->

谢谢！

Answer 1

您只需要为您的服务添加 selectedYear 即可。

service.ts

public selectedYear = 1900; // You can default to any year or make it null.


getWhatever() {
  
  const url = `https://example/api/whatever?Year=${selectedYear}`
  return this.http.get(url);
}  

然后在组件中，将 selectedYear 包装在 getter 和 setter 中。

component.ts

public get selectedYear() {
  return this._service.selectedYear;
}
public set selectedYear(year: number) {
  this._service.selectedYear = year;
}

constructor(
  private readonly _service: myService
){}

最后，使用 HMTL 中的 getter/setter。
component.html

<select [(ngModel)]="selectedYear">
...
</select>

这是演示。