Footer aggregate in Angular Grid component

31 Aug 202411 minutes to read

The Syncfusion Angular Grid component allows you to calculate and display aggregate values in the footer cells. The footer aggregate value is calculated from all the rows in the grid. You can use the footerTemplate property to render the aggregate value in the footer cells.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { GridModule } from '@syncfusion/ej2-angular-grids'
import { AggregateService } from '@syncfusion/ej2-angular-grids'



import { Component, OnInit } from '@angular/core';
import { data } from './datasource';

@Component({
imports: [
        
        GridModule
    ],

providers: [AggregateService],
standalone: true,
    selector: 'app-root',
    templateUrl: 'app.template.html'
})
export class AppComponent implements OnInit {

    public data?: object[];

    ngOnInit(): void {
        this.data = data;
    }
}
<ejs-grid [dataSource]='data' height='210px'>
    <e-columns>
        <e-column field='OrderID' headerText='Order ID' textAlign='right' width=120></e-column>
        <e-column field='CustomerID' headerText='Customer ID' width=150></e-column>
        <e-column field='Freight' width=150></e-column>
        <e-column field='ShipName' headerText='Ship Name' width=150></e-column>
    </e-columns>
    <e-aggregates>
        <e-aggregate>
            <e-columns>
                <e-column field="Freight" type="sum">
                    <ng-template #footerTemplate let-data>Sum: {{data.sum}}</ng-template>
                </e-column>
            </e-columns>
        </e-aggregate>
        <e-aggregate>
            <e-columns>
                <e-column field="Freight" type="max">
                    <ng-template #footerTemplate let-data>Max: {{data.max}}</ng-template>
                </e-column>
            </e-columns>
        </e-aggregate>
    </e-aggregates>
</ejs-grid>
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

  • Use the template reference variable name #footerTemplate to specify the footer template.
  • Inside the template, access the aggregate values using their corresponding type name. For example, to access the sum aggregate value, use data.sum.

Format the aggregate value

To format the aggregate value result in the Syncfusion Angular Grid component, you can use the format property of theAggregateColumnDirective. The format property allows you to specify a format string that determines how the aggregate value will be displayed.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { GridModule } from '@syncfusion/ej2-angular-grids'
import { AggregateService } from '@syncfusion/ej2-angular-grids'



import { Component, OnInit } from '@angular/core';
import { data } from './datasource';

@Component({
imports: [
        
        GridModule
    ],

providers: [AggregateService],
standalone: true,
    selector: 'app-root',
    templateUrl: 'app.template.html'
})
export class AppComponent implements OnInit {

    public data?: object[];

    ngOnInit(): void {
        this.data = data;
    }
}
<ejs-grid [dataSource]="data" height="210px">
    <e-columns>
        <e-column field="OrderID" headerText="Order ID" textAlign="right" width="120"></e-column>
        <e-column field="CustomerID" headerText="Customer ID" width="150"></e-column>
        <e-column field="Freight" width="150"></e-column>
        <e-column field="ShipName" headerText="Ship Name" width="150"></e-column>
    </e-columns>
    <e-aggregates>
        <e-aggregate>
            <e-columns>
                <e-column field="Freight" type="sum" format="N0">
                    <ng-template #footerTemplate let-data>Sum: {{ data.sum }}</ng-template>
                </e-column>
            </e-columns>
        </e-aggregate>
        <e-aggregate>
            <e-columns>
                <e-column field="Freight" type="max" format="N0">
                    <ng-template #footerTemplate let-data>Max: {{ data.max }}</ng-template>
                </e-column>
            </e-columns>
        </e-aggregate>
    </e-aggregates>
</ejs-grid>
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

How to place aggregates on top of the Grid

By default, the aggregated values are placed at the bottom of the footer section. It is possible to place the aggregated values at the top of the header. This is achieved by using the dataBound event, getHeaderContent, and getFooterContent methods of the Grid.

In the following, footer content is appended to the header content using the dataBound event of the Grid.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { GridModule } from '@syncfusion/ej2-angular-grids'
import { AggregateService } from '@syncfusion/ej2-angular-grids'
import { Component, OnInit, ViewChild } from '@angular/core';
import { data } from './datasource';
import { GridComponent } from '@syncfusion/ej2-angular-grids';

@Component({
imports: [GridModule],
providers: [AggregateService],
standalone: true,
    selector: 'app-root',
    template: `<ejs-grid  #grid [dataSource]='data' height='210px' (dataBound)="dataBound()">
    <e-columns>
        <e-column field='OrderID' headerText='Order ID' textAlign='right' width=120></e-column>
        <e-column field='CustomerID' headerText='Customer ID' width=150></e-column>
        <e-column field='Freight' width=150></e-column>
        <e-column field='ShipName' headerText='Ship Name' width=150></e-column>
    </e-columns>
    <e-aggregates>
        <e-aggregate>
            <e-columns>
                <e-column field="Freight" type="sum">
                    <ng-template #footerTemplate let-data>Sum: {{data.sum}}</ng-template>
                </e-column>
            </e-columns>
        </e-aggregate>
        <e-aggregate>
            <e-columns>
                <e-column field="Freight" type="max">
                    <ng-template #footerTemplate let-data>Max: {{data.max}}</ng-template>
                </e-column>
            </e-columns>
        </e-aggregate>
    </e-aggregates>
</ejs-grid>`
})
export class AppComponent implements OnInit {

    public data?: object[];
    @ViewChild('grid')
    public grid?: GridComponent;

    ngOnInit(): void {
        this.data = data;
    }
    dataBound() {
        (this.grid as GridComponent).getHeaderContent().append((this.grid as GridComponent).getFooterContent());
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));