Angular PrimeNG is an open-source framework with a rich set of native Angular UI components that are used for great styling and this framework is used to make responsive websites with very much ease. This article will show us how to use TreeTable Column Grouping in Angular PrimeNG.
Angular PrimeNG TreeTable Column Group enables the grouping of table columns in the TreeTable component. Columns can easily be grouped using templating which makes the table More Interactive and user-friendly. Column Grouping can be done using colspan and rowspan.
Syntax:
<ng-template pTemplate="header">
<tr>
<th colspan="2">Col1</th>
</tr>
<tr>
<th>Col2</th>
<th>Col3</th>
</tr>
</ng-template>Creating Angular application & Module Installation:
Step 1: Create an Angular application using the following command.
ng new appname
Step 2: After creating your project folder i.e. appname, move to it using the following command.
cd appname
Step 3: Install PrimeNG in your given directory.
npm install primeng --save npm install primeicons --save
Project Structure: It will look like the following:
Example 1: Below is a simple example that demonstrates the use of the Angular PrimeNG TreeTable Column Group.
app.component.html
<h2 style="color: green">GeeksforGeeks</h2>
<h4>Angular PrimeNG TreeTable Column Group</h4>
<p-treeTable #myTab [columns]="cols"
[value]="tableData">
<ng-template pTemplate="header">
<tr>
<th colspan="2">Information</th>
</tr>
<tr>
<th>Name</th>
<th>Age</th>
</tr>
</ng-template>
<ng-template pTemplate="body" let-rowNode let-rowData="rowData" let-columns="columns">
<tr>
<td *ngFor="let col of columns; let i = index">
<p-treeTableToggler [rowNode]="rowNode" *ngIf="i == 0">
</p-treeTableToggler>
{{ rowData[col.field] }}
</td>
</tr>
</ng-template>
</p-treeTable>
|
app.component.ts
import { Component, OnInit } from '@angular/core';
import { NodeService } from './nodeservice';
import { TreeNode } from 'primeng/api';
@Component({ selector: 'app-root',
templateUrl: './app.component.html',
}) export class AppComponent { tableData: TreeNode[] = [];
cols: any[] = [];
constructor(private nodeService: NodeService) { }
ngOnInit() {
this.cols = [
{ field: 'name', header: 'First Name' },
{ field: 'age', header: 'Age' },
];
this.tableData = [
{
data: {
name: 'David',
age: '40',
},
children: [
{
data: {
name: 'Nathan',
age: '16',
},
children: [
{
data: {
name: 'Abe',
age: '12',
},
},
{
data: {
name: 'Ksi',
age: '12',
},
},
],
},
{
data: {
name: 'Shane',
age: '14',
},
},
],
},
{
data: {
name: 'Warner',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
{
data: {
name: 'Max',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
{
data: {
name: 'Willy',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
{
data: {
name: 'Miley',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
{
data: {
name: 'Sam',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
{
data: {
name: 'James',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
];
}
} |
app.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { NodeService } from './nodeservice';
import { TreeTableModule } from 'primeng/treetable';
import { ButtonModule } from 'primeng/button';
import { InputTextModule } from 'primeng/inputtext';
@NgModule({ imports: [
BrowserModule,
BrowserAnimationsModule,
TreeTableModule,
ButtonModule,
InputTextModule,
HttpClientModule,
FormsModule,
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [NodeService],
}) export class AppModule { } |
Output:
Example 2: Below is another example that demonstrates the use of the Angular PrimeNG Basic Column Group.
app.component.html
<h2 style="color: green">GeeksforGeeks</h2>
<h4>Angular PrimeNG TreeTable Column Group</h4>
<p-treeTable #myTab [columns]="cols" [value]="tableData">
<ng-template pTemplate="header">
<tr>
<th colspan="3">Person Details</th>
</tr>
<tr>
<th colspan="2">Name</th>
<th rowspan="2">Age</th>
</tr>
<tr>
<th>First Name</th>
<th>Last Name</th>
</tr>
</ng-template>
<ng-template pTemplate="body" let-rowNode let-rowData="rowData" let-columns="columns">
<tr>
<td *ngFor="let col of columns; let i = index">
<p-treeTableToggler [rowNode]="rowNode" *ngIf="i == 0">
</p-treeTableToggler>
{{ rowData[col.field] }}
</td>
</tr>
</ng-template>
</p-treeTable>
|
app.component.ts
import { Component, OnInit } from '@angular/core';
import { NodeService } from './nodeservice';
import { TreeNode } from 'primeng/api';
@Component({ selector: 'app-root',
templateUrl: './app.component.html',
}) export class AppComponent { tableData: TreeNode[] = [];
cols: any[] = [];
constructor(private nodeService: NodeService) { }
ngOnInit() {
this.cols = [
{ field: 'firstname', header: 'First Name' },
{ field: 'lastname', header: 'Last Name' },
{ field: 'age', header: 'Age' },
];
this.tableData = [
{
data: {
firstname: 'David',
lastname: 'ace',
age: '40',
},
children: [
{
data: {
firstname: 'Nathan',
lastname: 'ace',
age: '16',
},
children: [
{
data: {
firstname: 'Abe',
lastname: 'ace',
age: '12',
},
},
{
data: {
firstname: 'Ksi',
lastname: 'ace',
age: '12',
},
},
],
},
{
data: {
firstname: 'Shane',
lastname: 'ace',
age: '14',
},
},
],
},
{
data: {
firstname: 'Warner',
lastname: 'ace',
age: '55',
},
children: [
{
data: {
lastname: 'ace',
firstname: 'Michelle',
age: '20',
},
},
{
data: {
firstname: 'Charlie',
lastname: 'ace',
age: '24',
},
},
],
},
{
data: {
firstname: 'Max',
lastname: 'ace',
age: '55',
},
children: [
{
data: {
firstname: 'Michelle',
lastname: 'ace',
age: '20',
},
},
{
data: {
firstname: 'Charlie',
lastname: 'ace',
age: '24',
},
},
],
},
{
data: {
firstname: 'Willy',
lastname: 'ace',
age: '55',
},
children: [
{
data: {
firstname: 'Michelle',
lastname: 'ace',
age: '20',
},
},
{
data: {
firstname: 'Charlie',
lastname: 'ace',
age: '24',
},
},
],
},
{
data: {
firstname: 'Miley',
lastname: 'ace',
age: '55',
},
children: [
{
data: {
firstname: 'Michelle',
lastname: 'ace',
age: '20',
},
},
{
data: {
firstname: 'Charlie',
lastname: 'ace',
age: '24',
},
},
],
},
{
data: {
firstname: 'Sam',
lastname: 'ace',
age: '55',
},
children: [
{
data: {
firstname: 'Michelle',
lastname: 'ace',
age: '20',
},
},
{
data: {
firstname: 'Charlie',
lastname: 'ace',
age: '24',
},
},
],
},
{
data: {
firstname: 'James',
lastname: 'ace',
age: '55',
},
children: [
{
data: {
firstname: 'Michelle',
lastname: 'ace',
age: '20',
},
},
{
data: {
lastname: 'ace',
firstname: 'Charlie',
age: '24',
},
},
],
},
];
}
} |
app.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { NodeService } from './nodeservice';
import { TreeTableModule } from 'primeng/treetable';
import { ButtonModule } from 'primeng/button';
import { InputTextModule } from 'primeng/inputtext';
@NgModule({ imports: [
BrowserModule,
BrowserAnimationsModule,
TreeTableModule,
ButtonModule,
InputTextModule,
HttpClientModule,
FormsModule,
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [NodeService],
}) export class AppModule { } |
Output:
Reference: https://primefaces.org/primeng/treetable/colgroup