create generic data table using angular material

Question

I want to create reusable angular material data table which can be used by any component and need to pass only required column header and other table data. Below is what I tried:

I am following this example: stackblitz

Created shared folder in src/app folder. and data table component too which will be reusable.

data-table.component.html:

<table mat-table [dataSource]="dataSource" matSort class="mat-elevation-z8">
    <ng-container [matColumnDef]="tableData" *ngFor="let tableData of objectKeys(columnHeader)">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> {{columnHeader[tableData]}} </th>
        <td mat-cell *matCellDef="let element; let i=index;"> {{element[tableData]}}</td>
    </ng-container>

    <tr mat-header-row *matHeaderRowDef="objectKeys(columnHeader)"></tr>
    <tr mat-row *matRowDef="let row; columns: objectKeys(columnHeader);"></tr>
</table>

data-table.component.ts:

import { Component, OnInit, Input, ViewChild } from '@angular/core';
import { MatSort, MatTableDataSource, MatPaginator } from '@angular/material';

@Component({
  selector: 'app-data-table',
  templateUrl: './data-table.component.html',
  styleUrls: ['./data-table.component.scss']
})
export class DataTableComponent implements OnInit {

  @Input() tableData;
  @Input() columnHeader;
  @Input() source;
  objectKeys = Object.keys;
  dataSource;

  @ViewChild(MatSort, { static: false }) sort: MatSort;
  @ViewChild(MatPaginator, { static: false }) paginator: MatPaginator;

  constructor() { }

  ngOnInit() {
    console.log(this.tableData);
    this.dataSource = new MatTableDataSource(this.tableData);
    this.dataSource.sort = this.sort;
  }

  applyFilter(filterValue: string) {
    this.dataSource.filter = filterValue.trim().toLowerCase();
  }
}

Now I am using app-data-table selector where I want. I have profile component in which I want to use this.

profile-setup.component.html:

<app-data-table [tableData]="tableData" [columnHeader]="columnHeader"></app-data-table>

profile-setup.component.ts:

import { Component, OnInit, ViewChild, AfterViewInit } from '@angular/core';
import { ProfileSetUp } from 'src/app/_interface/profile-setup.module';

@Component({
  selector: 'app-profile-setup',
  templateUrl: './profile-setup.component.html',
  styleUrls: ['./profile-setup.component.scss']
})


export class ProfileSetupComponent implements OnInit {

  constructor() { }

  ngOnInit() {
  }

  columnHeader = {'profileName': 'Profile Name', 'profileDesc': 'Description', 'adminUser': 'Admin User', 'id': ''};

  tableData: ProfileSetUp[] = [
    {
      id: 1,
      profileName: "Cameron Villams",
      profileDesc: "Face to face contact",
      adminUser: "Iwan Rynders",
      action: ""
    },
    {
      id: 2,
      profileName: "Charl Angle",
      profileDesc: "Face to face contact",
      adminUser: "Unknown",
      action: ""
    },
    {
      id: 3,
      profileName: "Johan Abraham",
      profileDesc: "Face to face contact",
      adminUser: "Unknown",
      action: ""
    },
    {
      id: 4,
      profileName: "Niekie Gadgilly",
      profileDesc: "Face to face contact",
      adminUser: "Unknown",
      action: ""
    },
    {
      id: 5,
      profileName: "Veer S",
      profileDesc: "Face to face contact",
      adminUser: "Unknown",
      action: ""
    }
  ];    
}

profile-setup.module:

export interface ProfileSetUp {
    id: number;
    profileName: string;
    profileDesc: string;
    adminUser: string;
    action: string;
}

How can I show data conditionally like, some of the data-tables may have "Edit", "Delete" buttons, some of the don't have those buttons. Any help will be appreciated.

@Ininiv this is what I had referred: https://stackblitz.com/edit/resuable-datatable-higlkc — Pathik Vejani, Nov 19 '19 at 12:08

score 0 · Answer 1 · answered Aug 21 '20 at 17:50

it is possible to pass a callback function to the table component. (updated project: stackblitz)

DataTableComponent

add an input for the button and a call for it.

  @Input() editButton;

  onEdit(element) {
    this.editButton(element);
  }

data-table.component.html

add logic to add a button for edit wiring the callback.

<div *ngIf="columnHeader[tableData] != 'Edit'">
      <td mat-cell *matCellDef="let element"> {{element[tableData] }}</td>
</div>
<div *ngIf="columnHeader[tableData] == 'Edit'">
  <td mat-cell *matCellDef="let element"> 
      <button mat-button (click)="onEdit(element)">
        edit
      </button> 
  </td>
</div>

EmployeeComponent

add an edit column.

columnHeader = {'studentID': 'ID', 'fname': 'First Name', 'lname': 'Last Name', 'weight': 'Weight', 'symbol': 'Code', 'edit': 'Edit'};

create a method for the callback.

  onEditClick = (element) => this.onEdit(element);

  onEdit(element) {
    console.log(element);
  }

employee.component.html

<app-data-table [tableData]="tableData" [columnHeader]="columnHeader" [editButton]="onEditClick"></app-data-table>

create generic data table using angular material

1 Answers1