Angular CDK:如何在ComponentPortal中设置输入 [英] Angular CDK: How to set Inputs in a ComponentPortal

问题描述

我想使用CDK中的新 Portal 在其中注入动态内容表单的多个部分.

I would like to use the new Portal from material CDK to inject dynamic content in multiple part of a form.

我有一个复杂的表单结构，目标是要有一个表单，该表单指定子组件可以(或不能)注入模板的多个位置.

I have a complex form structure and the goal is to have a form that specify multiple place where sub components could (or not) inject templates.

也许CDK门户网站不是最佳解决方案?

Maybe the CDK Portal is not the best solution for this?

我尝试了一些方法，但是我确定这不是这样做的方法: https://stackblitz.com/edit/angular-yuz1kg

I tried something but I am sure it is not the way of doing: https://stackblitz.com/edit/angular-yuz1kg

我也尝试过使用new ComponentPortal(MyPortalComponent)，但是如何设置输入呢?通常是componentRef.component.instance.myInput

I tried also with new ComponentPortal(MyPortalComponent) but how can we set Inputs on it ? Usually is something like componentRef.component.instance.myInput

推荐答案

您可以创建自定义注入器并将其注入到您创建的组件门户中.

You can create a custom injector and inject it to the component portal you create.

createInjector(dataToPass): PortalInjector {
    const injectorTokens = new WeakMap();
    injectorTokens.set(CONTAINER_DATA, dataToPass);
    return new PortalInjector(this._injector, injectorTokens);
}

CONTAINER_DATA是由-

export const CONTAINER_DATA = new InjectionToken<{}>('CONTAINER_DATA');

要消耗创建的注射器，请使用-

To consume created injector, use -

let containerPortal = new ComponentPortal(ComponentToPort, null, this.createInjector({
          data1,
          data2
        }));

overlay.attach(containerPortal);

overlay是OverlayRef的实例(这是门户出口)

overlay is an instance of OverlayRef (Which is Portal Outlet)

在ComponentToPort内部，您需要注入创建的注入器-

Inside ComponentToPort, you will need to inject the created injector -

@Inject(CONTAINER_DATA) public componentData: any

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