Angular - Mat-Paginator working on api based mat-table

To implement a mat-paginator with an API-based mat-table in Angular, follow these steps:

Step-by-Step Guide

1. Set Up Angular Material: Ensure Angular Material is added to your project.

   ng add @angular/material 

2. Import Required Modules: In your module file, import MatTableModule and MatPaginatorModule.

   import { MatTableModule } from '@angular/material/table'; import { MatPaginatorModule } from '@angular/material/paginator'; @NgModule({ imports: [ MatTableModule, MatPaginatorModule, // other imports ], }) export class AppModule {} 

3. Service for API Calls: Create a service to fetch data from your API.

Example Service

import { Injectable } from '@angular/core'; import { HttpClient } from '@angular/common/http'; import { Observable } from 'rxjs'; @Injectable({ providedIn: 'root' }) export class DataService { private apiUrl = 'https://api.example.com/data'; constructor(private http: HttpClient) {} getData(pageIndex: number, pageSize: number): Observable<any> { return this.http.get<any>(`${this.apiUrl}?page=${pageIndex}&size=${pageSize}`); } } 

4. Component Setup: Set up your component to integrate mat-table and mat-paginator.

Component TypeScript

import { Component, OnInit, ViewChild } from '@angular/core'; import { MatTableDataSource } from '@angular/material/table'; import { MatPaginator } from '@angular/material/paginator'; import { DataService } from './data.service'; @Component({ selector: 'app-your-component', templateUrl: './your-component.component.html', }) export class YourComponent implements OnInit { displayedColumns: string[] = ['id', 'name', 'age']; // Define your columns dataSource = new MatTableDataSource<any>(); @ViewChild(MatPaginator) paginator!: MatPaginator; constructor(private dataService: DataService) {} ngOnInit(): void { this.loadData(); } loadData(pageIndex: number = 0, pageSize: number = 10): void { this.dataService.getData(pageIndex, pageSize).subscribe(data => { this.dataSource.data = data.items; // Adjust based on your API response structure this.paginator.length = data.total; // Set total item count for pagination }); } pageChanged(event: any): void { this.loadData(event.pageIndex, event.pageSize); } } 

Component HTML

<!-- your-component.component.html --> <table mat-table [dataSource]="dataSource"> <!-- Define columns --> <ng-container matColumnDef="id"> <th mat-header-cell *matHeaderCellDef>ID</th> <td mat-cell *matCellDef="let element">{{ element.id }}</td> </ng-container> <ng-container matColumnDef="name"> <th mat-header-cell *matHeaderCellDef>Name</th> <td mat-cell *matCellDef="let element">{{ element.name }}</td> </ng-container> <ng-container matColumnDef="age"> <th mat-header-cell *matHeaderCellDef>Age</th> <td mat-cell *matCellDef="let element">{{ element.age }}</td> </ng-container> <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr> <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr> </table> <mat-paginator (page)="pageChanged($event)" [pageSize]="10"></mat-paginator> 

Summary

1. Service: Fetch data from the API using HttpClient.
2. Paginator Integration: Bind mat-paginator to handle pagination.
3. Data Handling: Update the data source and paginator length based on API responses.

This setup allows your mat-table to work seamlessly with API-based data and supports pagination effectively. Adjust API endpoint and response handling based on your specific needs!

Examples

1. Angular Mat-Paginator with API-based Mat-Table

   • Description: Implement Mat-Paginator to work with an API-driven Mat-Table in Angular, handling pagination requests and responses.
   • Code:

     import { Component, ViewChild, OnInit } from '@angular/core'; import { MatPaginator, PageEvent } from '@angular/material/paginator'; import { MatTableDataSource } from '@angular/material/table'; import { ApiService } from './api.service'; import { YourDataInterface } from './your-data.interface'; @Component({ selector: 'app-your-component', templateUrl: './your-component.component.html', styleUrls: ['./your-component.component.css'] }) export class YourComponent implements OnInit { displayedColumns: string[] = ['column1', 'column2', 'column3']; // Define your table columns dataSource = new MatTableDataSource<YourDataInterface>(); // Initialize MatTableDataSource @ViewChild(MatPaginator) paginator: MatPaginator; // ViewChild for MatPaginator constructor(private apiService: ApiService) {} ngOnInit() { this.dataSource.paginator = this.paginator; // Assign paginator to dataSource.paginator this.loadData(); // Load initial data } loadData() { this.apiService.getData().subscribe(data => { this.dataSource.data = data; // Set API response data to MatTableDataSource }); } onPageChange(event: PageEvent) { // Handle pagination events const startIndex = event.pageIndex * event.pageSize; this.apiService.getData(startIndex, event.pageSize).subscribe(data => { this.dataSource.data = data; // Update data based on pagination }); } } 

2. Angular Mat-Table pagination with HTTP service

   • Description: Integrate Mat-Paginator with an HTTP service in Angular to paginate data fetched from an API.
   • Code:

     // YourComponent.component.ts import { Component, OnInit, ViewChild } from '@angular/core'; import { MatPaginator, PageEvent } from '@angular/material/paginator'; import { MatTableDataSource } from '@angular/material/table'; import { YourApiService } from './your-api.service'; import { YourDataModel } from './your-data.model'; @Component({ selector: 'app-your-component', templateUrl: './your-component.component.html', styleUrls: ['./your-component.component.css'] }) export class YourComponent implements OnInit { displayedColumns: string[] = ['column1', 'column2', 'column3']; dataSource = new MatTableDataSource<YourDataModel>(); totalItems: number; pageSize = 10; pageIndex = 0; @ViewChild(MatPaginator) paginator: MatPaginator; constructor(private apiService: YourApiService) {} ngOnInit(): void { this.dataSource.paginator = this.paginator; this.loadData(); } loadData(): void { this.apiService.getData(this.pageIndex + 1, this.pageSize) .subscribe(response => { this.dataSource.data = response.data; this.totalItems = response.totalItems; }); } onPageChange(event: PageEvent): void { this.pageIndex = event.pageIndex; this.pageSize = event.pageSize; this.loadData(); } } 

3. Angular Mat-Paginator API pagination example

   • Description: Example of implementing Mat-Paginator for API-driven pagination in Angular.
   • Code:

     <!-- your-component.component.html --> <mat-table [dataSource]="dataSource" matSort> <!-- Define your table columns here --> <ng-container matColumnDef="column1"> <mat-header-cell *matHeaderCellDef mat-sort-header> Column 1 </mat-header-cell> <mat-cell *matCellDef="let element"> {{ element.column1 }} </mat-cell> </ng-container> <!-- Repeat for other columns --> <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row> <mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row> </mat-table> <mat-paginator [length]="totalItems" [pageSize]="pageSize" [pageSizeOptions]="[5, 10, 25, 100]" (page)="onPageChange($event)"> </mat-paginator> 

4. Angular Mat-Table pagination tutorial

   • Description: Step-by-step tutorial on implementing pagination with Mat-Table and Mat-Paginator in Angular.
   • Code:

     // your-component.component.ts import { Component, OnInit, ViewChild } from '@angular/core'; import { MatPaginator, PageEvent } from '@angular/material/paginator'; import { MatTableDataSource } from '@angular/material/table'; import { ApiService } from './api.service'; import { YourDataInterface } from './your-data.interface'; @Component({ selector: 'app-your-component', templateUrl: './your-component.component.html', styleUrls: ['./your-component.component.css'] }) export class YourComponent implements OnInit { displayedColumns: string[] = ['column1', 'column2', 'column3']; dataSource = new MatTableDataSource<YourDataInterface>(); totalItems: number; pageSize = 10; pageIndex = 0; @ViewChild(MatPaginator) paginator: MatPaginator; constructor(private apiService: ApiService) {} ngOnInit(): void { this.dataSource.paginator = this.paginator; this.loadData(); } loadData(): void { this.apiService.getData(this.pageIndex + 1, this.pageSize) .subscribe(response => { this.dataSource.data = response.data; this.totalItems = response.totalItems; }); } onPageChange(event: PageEvent): void { this.pageIndex = event.pageIndex; this.pageSize = event.pageSize; this.loadData(); } } 

5. Angular Mat-Table pagination example with backend

   • Description: Example of implementing Mat-Paginator for server-side pagination in Angular Material.
   • Code:

     // your-component.component.ts import { Component, OnInit, ViewChild } from '@angular/core'; import { MatPaginator, PageEvent } from '@angular/material/paginator'; import { MatTableDataSource } from '@angular/material/table'; import { YourApiService } from './your-api.service'; import { YourDataModel } from './your-data.model'; @Component({ selector: 'app-your-component', templateUrl: './your-component.component.html', styleUrls: ['./your-component.component.css'] }) export class YourComponent implements OnInit { displayedColumns: string[] = ['column1', 'column2', 'column3']; dataSource = new MatTableDataSource<YourDataModel>(); totalItems: number; pageSize = 10; pageIndex = 0; @ViewChild(MatPaginator) paginator: MatPaginator; constructor(private apiService: YourApiService) {} ngOnInit(): void { this.dataSource.paginator = this.paginator; this.loadData(); } loadData(): void { this.apiService.getData(this.pageIndex + 1, this.pageSize) .subscribe(response => { this.dataSource.data = response.data; this.totalItems = response.totalItems; }); } onPageChange(event: PageEvent): void { this.pageIndex = event.pageIndex; this.pageSize = event.pageSize; this.loadData(); } } 

6. Angular Mat-Paginator pagination example

   • Description: Example of setting up pagination with Mat-Paginator in Angular Material for API-based tables.
   • Code:

     <!-- your-component.component.html --> <mat-table [dataSource]="dataSource"> <!-- Define your table columns here --> <ng-container matColumnDef="column1"> <mat-header-cell *matHeaderCellDef> Column 1 </mat-header-cell> <mat-cell *matCellDef="let element"> {{ element.column1 }} </mat-cell> </ng-container> <!-- Repeat for other columns --> <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row> <mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row> </mat-table> <mat-paginator [length]="totalItems" [pageSize]="pageSize" [pageSizeOptions]="[5, 10, 25, 100]" (page)="onPageChange($event)"> </mat-paginator> 

7. Angular Mat-Table pagination with sorting

   • Description: Combine Mat-Paginator with Mat-Table sorting functionality in an Angular Material table.
   • Code:

     <!-- your-component.component.html --> <mat-table [dataSource]="dataSource" matSort> <!-- Define your table columns here --> <ng-container matColumnDef="column1"> <mat-header-cell *matHeaderCellDef mat-sort-header> Column 1 </mat-header-cell> <mat-cell *matCellDef="let element"> {{ element.column1 }} </mat-cell> </ng-container> <!-- Repeat for other columns --> <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row> <mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row> </mat-table> <mat-paginator [length]="totalItems" [pageSize]="pageSize" [pageSizeOptions]="[5, 10, 25, 100]" (page)="onPageChange($event)"> </mat-paginator> 

8. Angular Mat-Table pagination with filtering

   • Description: Implement Mat-Paginator with filtering capabilities in an Angular Material table.
   • Code:

     <!-- your-component.component.html --> <mat-form-field> <input matInput (keyup)="applyFilter($event.target.value)" placeholder="Filter"> </mat-form-field> <mat-table [dataSource]="dataSource" matSort> <!-- Define your table columns here --> <ng-container matColumnDef="column1"> <mat-header-cell *matHeaderCellDef> Column 1 </mat-header-cell> <mat-cell *matCellDef="let element"> {{ element.column1 }} </mat-cell> </ng-container> <!-- Repeat for other columns --> <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row> <mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row> </mat-table> <mat-paginator [length]="totalItems" [pageSize]="pageSize" [pageSizeOptions]="[5, 10, 25, 100]" (page)="onPageChange($event)"> </mat-paginator> 

9. Angular Mat-Paginator with custom pagination UI

   • Description: Customize the appearance and behavior of Mat-Paginator for an API-based Mat-Table in Angular Material.
   • Code:

     <!-- your-component.component.html --> <mat-table [dataSource]="dataSource"> <!-- Define your table columns here --> <ng-container matColumnDef="column1"> <mat-header-cell *matHeaderCellDef> Column 1 </mat-header-cell> <mat-cell *matCellDef="let element"> {{ element.column1 }} </mat-cell> </ng-container> <!-- Repeat for other columns --> <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row> <mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row> </mat-table> <mat-paginator [length]="totalItems" [pageSize]="pageSize" [pageSizeOptions]="[5, 10, 25, 100]" (page)="onPageChange($event)"> <mat-paginator-range-label></mat-paginator-range-label> <mat-paginator-page-size-options></mat-paginator-page-size-options> <mat-paginator-navigation></mat-paginator-navigation> </mat-paginator> 

10. Angular Mat-Paginator with dynamic data loading

    • Description: Implement Mat-Paginator to dynamically load data based on pagination events in Angular Material.
    • Code:

      // your-component.component.ts import { Component, OnInit, ViewChild } from '@angular/core'; import { MatPaginator, PageEvent } from '@angular/material/paginator'; import { MatTableDataSource } from '@angular/material/table'; import { ApiService } from './api.service'; import { YourDataInterface } from './your-data.interface'; @Component({ selector: 'app-your-component', templateUrl: './your-component.component.html', styleUrls: ['./your-component.component.css'] }) export class YourComponent implements OnInit { displayedColumns: string[] = ['column1', 'column2', 'column3']; dataSource = new MatTableDataSource<YourDataInterface>(); totalItems: number; pageSize = 10; pageIndex = 0; @ViewChild(MatPaginator) paginator: MatPaginator; constructor(private apiService: ApiService) {} ngOnInit(): void { this.dataSource.paginator = this.paginator; this.loadData(); } loadData(): void { this.apiService.getData(this.pageIndex + 1, this.pageSize) .subscribe(response => { this.dataSource.data = response.data; this.totalItems = response.totalItems; }); } onPageChange(event: PageEvent): void { this.pageIndex = event.pageIndex; this.pageSize = event.pageSize; this.loadData(); } } 

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