javascript - Angular Material 数据表导出到excel

Question

我正在使用 Angular Material 数据表以表格格式显示数据。我需要包含一个将表格数据导出到 excel 的功能。我找不到任何可以帮助我导出数据的文件。你能告诉我如何将数据导出到使用 Angular Material 数据表的 Angular 中的 excel。

我尝试使用 XLSX.utils 并遇到“Bad range (0): A1:A0 at check_ws”问题。

位置.component.html

<div class="example-container" #TABLE> 

  <mat-table #table [dataSource]="dataSource" matSort matSortActive="locationName" matSortDirection="asc" matSortDisableClear>
    <ng-container matColumnDef="locationName">
      <mat-header-cell *matHeaderCellDef mat-sort-header>Location Name </mat-header-cell>
      <mat-cell *matCellDef="let location"> {{location.locationName}} </mat-cell>
    </ng-container>
    <ng-container matColumnDef="address">
      <mat-header-cell *matHeaderCellDef>Address </mat-header-cell>
      <mat-cell *matCellDef="let location"> {{location.address}} </mat-cell>
    </ng-container>
    <ng-container matColumnDef="city">
      <mat-header-cell *matHeaderCellDef mat-sort-header> City </mat-header-cell>
      <mat-cell *matCellDef="let location"> {{location.city}} </mat-cell>
    </ng-container>
    <ng-container matColumnDef="country">
      <mat-header-cell *matHeaderCellDef mat-sort-header>Country </mat-header-cell>
      <mat-cell *matCellDef="let location"> {{location.country}} </mat-cell>
    </ng-container>
    <ng-container matColumnDef="zipcode">
      <mat-header-cell *matHeaderCellDef>ZipCode </mat-header-cell>
      <mat-cell *matCellDef="let location"> {{location.zipcode}} </mat-cell>
    </ng-container>
    <ng-container matColumnDef="phone">
      <mat-header-cell *matHeaderCellDef>Phone </mat-header-cell>
      <mat-cell *matCellDef="let location"> {{location.phone}} </mat-cell>
    </ng-container>
    <ng-container matColumnDef="timezone">
      <mat-header-cell *matHeaderCellDef> TimeZone </mat-header-cell>
      <mat-cell *matCellDef="let location"> {{location.timezone}} </mat-cell>
    </ng-container>
    <ng-container matColumnDef="action">
      <mat-header-cell *matHeaderCellDef> Action </mat-header-cell>
      <!-- <mat-cell *matCellDef="let location"> {{location.timezone}} </mat-cell> -->
      <mat-cell *matCellDef="let location">
      <a href ="#" class="btn Action-Tab" >Edit</a>&nbsp;&nbsp;
          <a href ="#" class="btn Action-Tab" >Delete</a>
        </mat-cell>
    </ng-container>
    <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
    <mat-row *matRowDef="let row; columns: displayedColumns;">
    </mat-row>
  </mat-table>

  <mat-paginator [pageSizeOptions]="[10, 20, 50,100]"></mat-paginator>

</div>
<button mat-raised-button color="primary" (click)="ExportTOExcel()">Export as Excel</button>

位置.component.ts

import { Component, OnInit, OnDestroy , ViewChild,ElementRef} from '@angular/core';
import { ILocation } from '../../Ilocation';
import { LocationService } from '../../services/location.service';
import { DataTableResource } from 'angular5-data-table';
import { Subscription } from 'rxjs';
import {MatPaginator, MatSort, MatTableDataSource} from '@angular/material';
import {DataSource} from '@angular/cdk/table';
import * as XLSX from 'xlsx';
// import { CdkTableModule } from '@angular/cdk/table';

@Component({
  selector: 'app-location',
  templateUrl: './location.component.html',
  styleUrls: ['./location.component.css']
})
export class LocationComponent implements OnInit , OnDestroy{
  errorMessage: string;
  filterBy : string;
  locations: ILocation[];
  items : ILocation[]=[];
  itemCount :number = 0;
  subscription:Subscription;
  limits = [5, 10, 20, 80];
  tableResource : DataTableResource<ILocation>;
  displayedColumns = ['locationName', 'address', 'city', 'country','zipcode', 'phone','timezone','action'];
  // dataSource: MatTableDataSource<ILocation>;
  dataSource;
  @ViewChild(MatPaginator) paginator: MatPaginator;
  @ViewChild(MatSort) sort : MatSort;
  @ViewChild('TABLE',{ read: ElementRef }) table: ElementRef;

  constructor( private locationService: LocationService) {

   }

   applyFilter(filterValue: string) {
    filterValue = filterValue.trim(); // Remove whitespace
    filterValue = filterValue.toLowerCase(); // Datasource defaults to lowercase matches
    this.dataSource.filter = filterValue;
  }

  ngOnInit() {
    this.subscription = this.locationService.getLocations()
    .subscribe(locations =>{
       this.locations = locations;
       this.dataSource = new MatTableDataSource(locations);
       this.dataSource.sort = this.sort;
       this.dataSource.paginator = this.paginator;
       this.dataSource.table = this.table;
      },
      error => this.errorMessage = <any>error);           
  }

  ngOnDestroy(){
    this.subscription.unsubscribe();

  }

  ExportTOExcel()
  {
    console.log("export");
    this.table.nativeElement.style.background = "red";
    const ws: XLSX.WorkSheet=XLSX.utils.table_to_sheet(this.table.nativeElement);
    const wb: XLSX.WorkBook = XLSX.utils.book_new();
    XLSX.utils.book_append_sheet(wb, ws, 'Sheet1');

    /* save to file */
    XLSX.writeFile(wb,'SheetJS.xlsx');
    console.log("exported");

  }

}

Answer 1

您可以使用 xlsx 用于将表格导出为 excel。
用法
执行 npm i xlsx

HTML:

<div class="example-container mat-elevation-z8 " #TABLE>
  <table mat-table #table [dataSource]="dataSource">

    <!--- Note that these columns can be defined in any order.
          The actual rendered columns are set as a property on the row definition" -->

    <!-- Position Column -->
    <ng-container matColumnDef="position">
      <th mat-header-cell *matHeaderCellDef> No. </th>
      <td mat-cell *matCellDef="let element"> {{element.position}} </td>
      //..................................rest of the html
    <button mat-raised-button color="primary" (click)="exportAsExcel()">Export as Excel</button></div>

在你的组件中

import {Component,ViewChild, ElementRef} from '@angular/core';
 import * as XLSX from 'xlsx';
//......
    export class AppComponent  {
      @ViewChild('TABLE') table: ElementRef;
    exportAsExcel()
    {
      const ws: XLSX.WorkSheet=XLSX.utils.table_to_sheet(this.table.nativeElement);//converts a DOM TABLE element to a worksheet
      const wb: XLSX.WorkBook = XLSX.utils.book_new();
      XLSX.utils.book_append_sheet(wb, ws, 'Sheet1');

      /* save to file */
      XLSX.writeFile(wb, 'SheetJS.xlsx');

    }
    }

DEMO