问angular ng-选择如何使用模板表达式设置选定值

EN

  @Component({
  selector: 'ice-select',
  templateUrl: './ice-select.component.html',
  providers: [
    {
      provide: NG_VALUE_ACCESSOR,
      useExisting: forwardRef(() => IceSelectComponent),
      multi: true
    }
  ]
})

export class IceSelectComponent implements ControlValueAccessor, OnInit {

      public writeValue(value: any) {
        this.selectedValue = value;
      }

      public registerOnChange(fn) {
        this.propagateChange = fn;
      }

      public registerOnTouched(fn){
        this.propagateTouched = fn;
      }
}

<ng-select
           [options]="options"
           [multiple]="false"
           [noFilter]="100"
           [allowClear]="true"
           [notFoundMsg]= "'No records found'"
           placeholder="Select"
           (selected)="onSelect($event)"
           (deselected)="onRemove($event)"
           [(ngModel)]="selectedValue"
></ng-select>