Question

伙计我是Angular 2的新手，基本上我想在另一个组件中使用一个组件的值，以便我能够根据该值填充数据。

基本上我有三个组件App.Component，Category.Component和Products.Component。

App.Component是两个组件的父级。

这是Category.Component代码

@Component({
selector: 'Categories',
template: `<li *ngFor="#category of categories">
                <a class="" href="{{category.Id}}" (click)="getCategoryProducts(category)">{{category.Name}}</a>
           </li>`,
providers :[CategoryService]

})
export class CategoriesComponent {
getData: string;
private categories: CategoryModel[] = [];
private products:ProductModel[] = [];
private productsComponent:ProductsComponent;
constructor(private _categoryService : CategoryService){
    this._categoryService.getCategories()
    .subscribe(
        a=>{
            this.categories = a;
        }
    );
    console.log(this.getData);

}

getCategoryProducts(category:CategoryModel)
{
    this._categoryService.getProducts(category.Id)
    .subscribe(
        a=>{
            this.products = a;
            this.productsComponent.populateProducts(this.products);
        }
    );
}


}

这是Products.Component代码

@Component({
selector: 'products',
template: `<div class="products-wrapper grid-4 products clearfix loading">
            <div *ngFor="#product of products"  (click)="getProduct(product)" class="product">
                <div class="product-inner" style="background:url({{product.pictureUrl}})">
                    <div class="time-left">
                        <span class="text">Hourly Deal</span>
                        <ul class="countdown clearfix">
                            <li> 
                                <div class="text">
                                    <span class="hours">00</span>
                                </div>
                            </li>

                            <li> 
                                <div class="text">
                                    <span class="minutes">00</span>
                                </div>
                            </li>
                            <li> 
                                <div class="text">
                                    <span class="seconds">00</span>
                                </div>
                            </li>
                        </ul>
                    </div>
                    <span class="discount-tag">{{product.discount}}%</span>

                </div>
            </div>
            </div>`,
            providers :[CategoryService]

})
@Injectable()
export class ProductsComponent {
private product:ProductModel;
private products: ProductModel[] = [];
constructor(private _categoryService : CategoryService)
{
    this._categoryService.getProducts(0)
    .subscribe(
        a=>{
            this.products = a;
        }
    );
}
getProduct(product:ProductModel)
{
    alert(product.productId);
    this.product = product;
}
populateProducts(products: ProductModel[] = [])
{
    this.products = products;
}
 }

基本上我想将产品从类别组件的getCategoryProducts功能发送到产品组件，以便我可以填充产品。

请帮帮我谢谢

Answer 1

在主要组件中，您可以将产品组件的实例提供给类别一：

<categories [productsComponent]="productsComponent"></categories>
<products #productsComponent></products>

您需要为productsComponent字段添加输入：

@Component({
  (...)
})
export class CategoriesComponent {
  getData: string;
  private categories: CategoryModel[] = [];
  private products:ProductModel[] = [];
  @Input() // <------
  private productsComponent:ProductsComponent;
  (...)
}

使用Typescript调用Angular 2中的其他组件函数

1 个答案: