我应该如何以角度实现动态路由

Question

这里也是实际输出

1. 我想创建一个动态路由，从对象数组中获取数据
2. 在这里你可以看到我想从 subCategory 中获取数据并以卡片的形式在不同的页面上显示名称。

在这里，我与大家分享我的代码。

1. all-trades.component.ts

 templateUrl: './all-trades.component.html',
  styleUrls: ['./all-trades.component.css'],
})
export class AllTradesComponent implements OnInit {

// This is my Array of Object

  crops = [
    {
      name: 'Rice',
      checked: true,
      subCategory: [
        {
          id: 1,
          name: 'Basmati',
          isActive: true,
        },
        {
          id: 2,
          name: 'Ammamore',
          isActive: true,
        },
      ],
    },
    {
      name: 'Wheat',
      checked: true,
      subCategory: [
        {
          id: 1,
          name: 'Durum',
          isActive: true,
        },
        {
          id: 2,
          name: 'Emmer',
          isActive: true,
        },
      ],
    }, {
      name: 'Barley',
      checked: true,
      subCategory: [
        {
          id: 1,
          name: 'Hulless Barley',
          isActive: true,
        },
        {
          id: 2,
          name: 'Barley Flakes',
          isActive: true,
        },
      ],
    }
  ]



  onChange(event, index, item) {
    item.checked = !item.checked;
    console.log(index, event, item);
  }

  constructor(private route: ActivatedRoute) { }

  ngOnInit(): void { }

  
}

2. all-trades.component.html

<app-header></app-header>
<div
  fxLayout="row"
  fxLayout.lt-md="column"
  fxLayoutAlign="space-between start"
  fxLayoutAlign.lt-md="start stretch"
>
  <div class="container-outer" fxFlex="20">
    <div class="filters">
      <section class="example-section">
        <span class="example-list-section">
          <h1>Select Crop</h1>
        </span>
        <span class="example-list-section">
          <ul>
            <li *ngFor="let crop of crops">
              <mat-checkbox
                [checked]="crop.checked"
                (change)="onChange($event, i, crop)"
              >
                {{ crop.name }}
              </mat-checkbox>
            </li>
          </ul>
        </span>
      </section>

      <section class="example-section">
        <span class="example-list-section">
          <h1>Select District</h1>
        </span>
        <span class="example-list-section">
          <ul>
            <li *ngFor="let district of districts">
              <mat-checkbox>
                {{ district.name }}
              </mat-checkbox>
            </li>
          </ul>
        </span>
      </section>
    </div>
  </div>
  <div class="content container-outer" fxFlex="80">
    <mat-card
      class="crop-card"
      style="min-width: 17%"
      *ngFor="let crop of crops"
      [hidden]="!crop.checked"
    >
    <!-- I tried the logic here to navigate to sub-Category Array by its id.
    But I failed -->
      <a
        [routerLink]="['/all-trades', crop.id]"
        routerLinkActive="router-link-active"
      >
        <mat-card-header>
          <img
            mat-card-avatar
            class="example-header-image"
            src="/assets/icons/crops/{{ crop.name }}.PNG"
            alt="crop-image"
          />
          <mat-card-title>{{ crop.name }}</mat-card-title>
          <mat-card-subtitle>100 Kgs</mat-card-subtitle>
        </mat-card-header>
      </a>
      <mat-card-content>
        <p>PRICE</p>
      </mat-card-content>
    </mat-card>
  </div>
</div>

<app-footer></app-footer>

在这里你们可以看到在我的网页上有几张名为“RICE”、“WHEAT”、“BARLY”的卡片 我只想通过点击 RICE 我的代码应该导航到另一个组件页面并显示名称来自我的对象数组的子类别名称。 同样，它也适用于“WHEAT”和“BARLEY” 示例：当我点击 Wheat Card 时，它应该导航到不同的页面并显示 Wheat 部分的 subCategory 的名称。

crops = [
    {
      name: 'Rice', <---- 1. Go here
      checked: true,
      subCategory: [ <-- 2. Go to subCategory and fetch the name of the "RICE" on different Page
        {
          id: 1,
          name: 'Basmati',
          isActive: true,
        },
        {
          id: 2,
          name: 'Ammamore',
          isActive: true,
        },
      ],
    },
    {
      name: 'Wheat',
      checked: true,
      subCategory: [
        {
          id: 1,
          name: 'Durum',
          isActive: true,
        },
        {
          id: 2,
          name: 'Emmer',
          isActive: true,
        },
      ],
    }, {
      name: 'Barley',
      checked: true,
      subCategory: [
        {
          id: 1,
          name: 'Hulless Barley',
          isActive: true,
        },
        {
          id: 2,
          name: 'Barley Flakes',
          isActive: true,
        },
      ],
    }
  ]

Answer 1

将您的对象数组添加到共享文件夹中（如果没有创建一个名称为 shared 的目录）

将Crop.ts创建到共享文件夹中

import {subcategory} from './subcategory';
export class Crop{
    checked:boolean
    name: string;
    comments: Subcategory[];
}

创建subcategory.ts到共享文件夹

export class subcategory{
id:string,
name:string,
isActive:boolean
}

将cropdata.ts创建到共享文件夹中

import {Crop} from './crop';

export const CROP: Crop[] = [
    {
      name: 'Rice',
      checked: true,
      subCategory:[ 
        {
          id: 1,
          name: 'Basmati',
          isActive: true,
        },
        {
          id: 2,
          name: 'Ammamore',
          isActive: true,
        },
      ],
    },
    {
      name: 'Wheat',
      checked: true,
      subCategory: [
        {
          id: 1,
          name: 'Durum',
          isActive: true,
        },
        {
          id: 2,
          name: 'Emmer',
          isActive: true,
        },
      ],
    }, {
      name: 'Barley',
      checked: true,
      subCategory: [
        {
          id: 1,
          name: 'Hulless Barley',
          isActive: true,
        },
        {
          id: 2,
          name: 'Barley Flakes',
          isActive: true,
        },
      ],
    }
]

 [routerLink]="['/Cropdetail', crop.name]"

 {path:'Cropdetail/:name',component:CropdetailComponent},

在 Cropdetail.ts（cropdetail 组件）中

ngOnInit(): void {
  let name = this.route.snapshot.params['name'];
    this.crop= this.cropservice.getCrop(name);
}

生成服务cropservice

import {CROP} from '../shared/cropdata';

CropData:CROP
getCrop(name: string): CROP{
    return CropData.filter((crop) => (crop.name === name))[0];
}

最后在访问cropdetail.html {{Crop.subCategory}}子类别