Mari kita bincangkan tentang cara menggunakan Bahan sudut untuk membuat jadual statistik

Bagaimana untuk menggunakan Bahan sudut untuk membuat jadual statistik? Artikel berikut akan memperkenalkan kepada anda cara menggunakan angular Bahan untuk membuat jadual statistik saya harap ia akan membantu anda!

Gunakan Bahan sudut untuk membuat jadual statistik

Pasang Bahan Sudut, alat pembangunan komponen (CDK) dan perpustakaan animasi sudut, dan menjalankan skema kod

ng add @angular/material

skema jadual akan mencipta komponen yang menjadikan Bahan Sudut pra-bina dengan sumber data boleh diisih dan boleh halaman. [Tutorial berkaitan yang disyorkan: "tutorial sudut"]

ng generate @angular/material:table texe1

Kemudian buat pengubahsuaian berdasarkan ini.

Fail html komponen ini

<div class="mat-elevation-z8">
  <table mat-table class="full-width-table" matSort aria-label="Elements">
    <!-- Id Column -->
    <ng-container matColumnDef="id">
      <th mat-header-cell *matHeaderCellDef mat-sort-header>序号</th>
      <td mat-cell *matCellDef="let row">{{row.id}}</td>
    </ng-container>

    <!-- Name Column -->
    <ng-container matColumnDef="name">
      <th mat-header-cell *matHeaderCellDef mat-sort-header>	岩土名</th>
      <td mat-cell *matCellDef="let row">{{row.name}}</td>
    </ng-container>

    <!-- num1 Column -->
    <ng-container matColumnDef="num1">
      <th mat-header-cell *matHeaderCellDef mat-sort-header>	期望数量</th>
      <td mat-cell *matCellDef="let row">{{row.num1}}</td>
    </ng-container>

    <!-- num2 Column -->
    <ng-container matColumnDef="num2">
      <th mat-header-cell *matHeaderCellDef mat-sort-header>	当前数量</th>
      <td mat-cell *matCellDef="let row">{{row.num2}}</td>
    </ng-container>



    <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
    <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
  </table>

  <!-- 控制表格数据的显示长度 -->
  <mat-paginator #paginator
      [length]="dataSource?.data?.length"
      [pageIndex]="0"
      [pageSize]="10"
      [pageSizeOptions]="[5, 10, 17]"
      aria-label="Select page">
  </mat-paginator>
</div>

Fail texe1-datasource.ts komponen ini

import { DataSource } from '@angular/cdk/collections';
import { MatPaginator } from '@angular/material/paginator';
import { MatSort } from '@angular/material/sort';
import { map } from 'rxjs/operators';
import { Observable, of as observableOf, merge } from 'rxjs';

// TODO: Replace this with your own data model type
export interface Texe1Item {
  name: string;
  id: number;
  num1: number;
  num2: number;
}

// TODO: replace this with real data from your application
const EXAMPLE_DATA: Texe1Item[] = [
  {id: 1, name: '粉质粘土', num1:1000, num2:100,},
  {id: 2, name: '淤泥质粉质粘土', num1:1000, num2:100,},
  {id: 3, name: '粘土', num1:1000, num2:100,},
  {id: 4, name: '粘质粉土', num1:1000, num2:100,},
  {id: 5, name: '淤泥质粘土', num1:1000, num2:100,},
  {id: 6, name: '圆砾（角砾）', num1:1000, num2:100,},
  {id: 7, name: '中砂', num1:1000, num2:1000,},
  {id: 8, name: '有机质土', num1:1000, num2:100,},
  {id: 9, name: '泥炭质土A', num1:1000, num2:100,},
  {id: 10, name: '泥炭质土B', num1:1000, num2:100,},
  {id: 11, name: '砂质粉土', num1:1000, num2:100,},
  {id: 12, name: '粉砂', num1:1000, num2:100,},
  {id: 13, name: '细砂', num1:1000, num2:100,},
  {id: 14, name: '粗砂', num1:1000, num2:100,},
  {id: 15, name: '砾砂', num1:1000, num2:100,},
  {id: 16, name: '卵石（碎石）', num1:1000, num2:100,},
  {id: 17, name: '漂石（块石）', num1:1000, num2:100,},

];

/**
 * Data source for the Texe1 view. This class should
 * encapsulate all logic for fetching and manipulating the displayed data
 * (including sorting, pagination, and filtering).
 */
export class Texe1DataSource extends DataSource<Texe1Item> {
  data: Texe1Item[] = EXAMPLE_DATA;
  paginator: MatPaginator | undefined;
  sort: MatSort | undefined;

  constructor() {
    super();
  }

  /**
   * Connect this data source to the table. The table will only update when
   * the returned stream emits new items.
   * @returns A stream of the items to be rendered.
   */
  connect(): Observable<Texe1Item[]> {
    if (this.paginator && this.sort) {
      // Combine everything that affects the rendered data into one update
      // stream for the data-table to consume.
      return merge(observableOf(this.data), this.paginator.page, this.sort.sortChange)
        .pipe(map(() => {
          return this.getPagedData(this.getSortedData([...this.data ]));
        }));
    } else {
      throw Error(&#39;Please set the paginator and sort on the data source before connecting.&#39;);
    }
  }

  /**
   *  Called when the table is being destroyed. Use this function, to clean up
   * any open connections or free any held resources that were set up during connect.
   */
  disconnect(): void {}

  /**
   * Paginate the data (client-side). If you&#39;re using server-side pagination,
   * this would be replaced by requesting the appropriate data from the server.
   */
  private getPagedData(data: Texe1Item[]): Texe1Item[] {
    if (this.paginator) {
      const startIndex = this.paginator.pageIndex * this.paginator.pageSize;
      return data.splice(startIndex, this.paginator.pageSize);
    } else {
      return data;
    }
  }

  /**
   * Sort the data (client-side). If you&#39;re using server-side sorting,
   * this would be replaced by requesting the appropriate data from the server.
   */
  private getSortedData(data: Texe1Item[]): Texe1Item[] {
    if (!this.sort || !this.sort.active || this.sort.direction === &#39;&#39;) {
      return data;
    }

    return data.sort((a, b) => {
      const isAsc = this.sort?.direction === &#39;asc&#39;;
      switch (this.sort?.active) {
        case &#39;name&#39;: return compare(a.name, b.name, isAsc);
        case &#39;id&#39;: return compare(+a.id, +b.id, isAsc);
        default: return 0;
      }
    });
  }
}

/** Simple sort comparator for example ID/Name columns (for client-side sorting). */
function compare(a: string | number, b: string | number, isAsc: boolean): number {
  return (a < b ? -1 : 1) * (isAsc ? 1 : -1);
}

Fail texe1.component.ts komponen ini

import { AfterViewInit, Component, ViewChild } from '@angular/core';
import { MatPaginator } from '@angular/material/paginator';
import { MatSort } from '@angular/material/sort';
import { MatTable } from '@angular/material/table';
import { Texe1DataSource, Texe1Item } from './texe1-datasource';

@Component({
  selector: 'app-texe1',
  templateUrl: './texe1.component.html',
  styleUrls: ['./texe1.component.css']
})
export class Texe1Component implements AfterViewInit {
  @ViewChild(MatPaginator) paginator!: MatPaginator;
  @ViewChild(MatSort) sort!: MatSort;
  @ViewChild(MatTable) table!: MatTable<Texe1Item>;
  dataSource: Texe1DataSource;

  /** Columns displayed in the table. Columns IDs can be added, removed, or reordered. */
  displayedColumns = [&#39;id&#39;, &#39;name&#39;,&#39;num1&#39;,&#39;num2&#39;];

  constructor() {
    this.dataSource = new Texe1DataSource();
  }

  ngAfterViewInit(): void {
    this.dataSource.sort = this.sort;
    this.dataSource.paginator = this.paginator;
    this.table.dataSource = this.dataSource;
  }
}

Akhir sekali, ia akan dipaparkan dalam fail app.component.html.

<app-texe1></app-texe1>

Rendering:

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