这是 Angular2 模板：
<paper-dropdown-menu label="Country">
<paper-listbox class="dropdown-content" [(ngModel)]="selectedCountry" (ngModelChange)="GetAdmin1s($event)">
<paper-item *ngFor="let country of countries" value="{{country.Id}}">{{country.Name}}</paper-item>
</paper-listbox>
</paper-dropdown-menu>
我收到此错误：
"Template parse errors:
Property binding ngFor not used by any directive on an embedded template (""dropdown-content" [(ngModel)]="selectedCountry" (ngModelChange)="GetAdmin1s($event)">
[ERROR ->]<paper-item *ngFor="let country of countries" value="{{country.Id}}">{{country.Name}}</paper-item>
"): LocationComponent@4:12
Property binding ngForCountry not used by any directive on an embedded template (""dropdown-content" [(ngModel)]="selectedCountry" (ngModelChange)="GetAdmin1s($event)">
[ERROR ->]<paper-item *ngFor="let country of countries" value="{{country.Id}}">{{country.Name}}</paper-item>
"): LocationComponent@4:12"
国家变量定义为：
public countries: Array<Country> = [];
我使用 ngFor 有什么问题吗？为什么要寻找 ngForCountry？
Just try might help
<paper-dropdown-menu label="Country">
<paper-listbox class="dropdown-content" [(ngModel)]="selectedCountry" (ngModelChange)="GetAdmin1s($event)">
<paper-item ngFor #country [ngForOf]="countries" value="{{country.Id}}">{{country.Name}}</paper-item>
</paper-listbox>
</paper-dropdown-menu>
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