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feature(EJ2-3757): virtual scroll sample added.
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‎src/grid/images/spinner.gif

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‎src/grid/virtualization-plnkr.json

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‎src/grid/virtualization.component.ts

Lines changed: 53 additions & 36 deletions
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@@ -1,50 +1,67 @@
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import { Component, OnInit } from '@angular/core';
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import { VirtualScrollService } from '@syncfusion/ej2-ng-grids';
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import { Component, OnInit, ViewEncapsulation, ViewChild } from '@angular/core';
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import { VirtualScrollService, GridComponent } from '@syncfusion/ej2-ng-grids';
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@Component({
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selector: 'ej2-gridvirtual',
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templateUrl: 'virtualization.html',
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styleUrls: ['virtualization.style.css'],
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encapsulation: ViewEncapsulation.None,
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providers: [VirtualScrollService]
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})
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export class VirtualizationComponent implements OnInit {
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public data: Object[] = [];
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public virtualData: Object[] = [];
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public names: string[] = ['hardire', 'abramjo01', 'aubucch01', "Hook", "Rumpelstiltskin", "Belle", "Emma", "Regina", "Aurora", "Elsa", "Anna", "Snow White", "Prince Charming", "Cora", "Zelena", "August", "Mulan", "Graham", "Discord", "Will", "Robin Hood", "Jiminy Cricket", "Henry", "Neal", "Red",
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"Aaran", "Aaren", "Aarez", "Aarman", "Aaron", "Aaron-James", "Aarron", "Aaryan", "Aaryn", "Aayan", "Aazaan", "Abaan", "Abbas", "Abdallah", "Abdalroof", "Abdihakim", "Abdirahman", "Abdisalam", "Abdul", "Abdul-Aziz", "Abdulbasir", "Abdulkadir", "Abdulkarem", "Abdulkhader", "Abdullah", "Abdul-Majeed", "Abdulmalik", "Abdul-Rehman", "Abdur", "Abdurraheem", "Abdur-Rahman", "Abdur-Rehmaan", "Abel", "Abhinav", "Abhisumant", "Abid", "Abir", "Abraham", "Abu", "Abubakar", "Ace", "Adain", "Adam", "Adam-James", "Addison", "Addisson", "Adegbola", "Adegbolahan", "Aden", "Adenn", "Adie", "Adil", "Aditya", "Adnan", "Adrian", "Adrien", "Aedan", "Aedin", "Aedyn", "Aeron", "Afonso", "Ahmad", "Ahmed", "Ahmed-Aziz", "Ahoua", "Ahtasham", "Aiadan", "Aidan", "Aiden", "Aiden-Jack", "Aiden-Vee"];
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public ngOnInit(): void {
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for (let i: number = 0; i < 5000; i++) {
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this.data.push({
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"FIELD1": this.names[Math.floor(Math.random() * this.names.length)],
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"FIELD2": 1967 + (i % 10),
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"FIELD3": Math.floor(Math.random() * 200),
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"FIELD4": Math.floor(Math.random() * 100),
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"FIELD5": Math.floor(Math.random() * 2000),
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"FIELD6": Math.floor(Math.random() * 1000),
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"FIELD7": Math.floor(Math.random() * 100),
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"FIELD8": Math.floor(Math.random() * 10),
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"FIELD9": Math.floor(Math.random() * 10),
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"FIELD10": Math.floor(Math.random() * 100),
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"FIELD11": Math.floor(Math.random() * 100),
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"FIELD12": Math.floor(Math.random() * 1000),
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"FIELD13": Math.floor(Math.random() * 10),
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"FIELD14": Math.floor(Math.random() * 10),
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"FIELD15": Math.floor(Math.random() * 1000),
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"FIELD16": Math.floor(Math.random() * 200),
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"FIELD17": Math.floor(Math.random() * 300),
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"FIELD18": Math.floor(Math.random() * 400),
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"FIELD19": Math.floor(Math.random() * 500),
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"FIELD20": Math.floor(Math.random() * 700),
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"FIELD21": Math.floor(Math.random() * 800),
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"FIELD22": Math.floor(Math.random() * 1000),
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"FIELD23": Math.floor(Math.random() * 2000),
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"FIELD24": Math.floor(Math.random() * 150),
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"FIELD25": Math.floor(Math.random() * 1000),
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"FIELD26": Math.floor(Math.random() * 100),
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"FIELD27": Math.floor(Math.random() * 400),
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"FIELD28": Math.floor(Math.random() * 600),
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"FIELD29": Math.floor(Math.random() * 500),
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"FIELD30": Math.floor(Math.random() * 300),
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@ViewChild('grid')
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public grid: GridComponent;
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public ngOnInit(): void {}
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onClick = (args: any) => {
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for (let i: number = 0; i < 100000; i++) {
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if (!this.virtualData.length){
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this.show();
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}
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this.virtualData.push({
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'FIELD1': this.names[Math.floor(Math.random() * this.names.length)],
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'FIELD2': 1967 + (i % 10),
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'FIELD3': Math.floor(Math.random() * 200),
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'FIELD4': Math.floor(Math.random() * 100),
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'FIELD5': Math.floor(Math.random() * 2000),
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'FIELD6': Math.floor(Math.random() * 1000),
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'FIELD7': Math.floor(Math.random() * 100),
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'FIELD8': Math.floor(Math.random() * 10),
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'FIELD9': Math.floor(Math.random() * 10),
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'FIELD10': Math.floor(Math.random() * 100),
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'FIELD11': Math.floor(Math.random() * 100),
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'FIELD12': Math.floor(Math.random() * 1000),
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'FIELD13': Math.floor(Math.random() * 10),
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'FIELD14': Math.floor(Math.random() * 10),
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'FIELD15': Math.floor(Math.random() * 1000),
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'FIELD16': Math.floor(Math.random() * 200),
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'FIELD17': Math.floor(Math.random() * 300),
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'FIELD18': Math.floor(Math.random() * 400),
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'FIELD19': Math.floor(Math.random() * 500),
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'FIELD20': Math.floor(Math.random() * 700),
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'FIELD21': Math.floor(Math.random() * 800),
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'FIELD22': Math.floor(Math.random() * 1000),
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'FIELD23': Math.floor(Math.random() * 2000),
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'FIELD24': Math.floor(Math.random() * 150),
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'FIELD25': Math.floor(Math.random() * 1000),
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'FIELD26': Math.floor(Math.random() * 100),
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'FIELD27': Math.floor(Math.random() * 400),
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'FIELD28': Math.floor(Math.random() * 600),
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'FIELD29': Math.floor(Math.random() * 500),
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'FIELD30': Math.floor(Math.random() * 300),
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});
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}
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this.grid.dataSource = this.virtualData;
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this.grid.refresh();
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}
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show(): void {
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document.getElementById('popup').style.display = 'inline-block';
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}
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hide(): void {
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document.getElementById('popup').style.display = 'none';
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}
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}

‎src/grid/virtualization.html

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<div class="control-section">
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<ej-grid [dataSource]='data' [enableVirtualization]='true' [enableColumnVirtualization]='true' height='400'>
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<button ej-button (click)='onClick($event)' cssClass='e-info'>Load 100K Data</button>
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<span id="popup">
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<span id="gif" class="image"></span>
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</span>
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<ej-grid #grid [dataSource]='virtualData' [enableVirtualization]='true' [enableColumnVirtualization]='true' height='600' (dataBound)='hide()'>
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<e-columns>
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<e-column field='FIELD1' headerText='Player Name' width='120'></e-column>
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<e-column field='FIELD2' headerText='Year' width='100'></e-column>
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<p>
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Note: The <code><a target="_blank" class="code"
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href="http://ej2.syncfusion.com/documentation/grid/api-grid.html#height-string---number">
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height</a></code> property must be defined when enable row virtualization.
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height</a></code> property must be defined when enable <code><a target="_blank" class="code"
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href="http://ej2.syncfusion.com/documentation/grid/api-grid.html#enablevirtualization-boolean">
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enableVirtualization </a></code>.
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</p>
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<p>
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In this demo, the Grid have 5000 rows and 30 columns. Also row and column virtualization is enabled on this.
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In this demo, Grid enabled row and column virtualization. Click the Load 100K Data button to bind 100000 rows and 30 columns.
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</p>
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<p style='font-weight: 500'>Injecting Module</p>
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<p>Grid component features are segregated into individual feature-wise modules. To use Virtualscrolling feature, we need

‎src/grid/virtualization.style.css

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.image {
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position: absolute;
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background-repeat: no-repeat;
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background-image: url('src/grid/images/spinner.gif');
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background-position: center;
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width: 16px;
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height: 35px;
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}
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.e-bigger .image {
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height: 48px;
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}
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#popup {
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position: absolute;
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background-color: transparent;
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display: none;
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z-index: 100;
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}
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.e-info{
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margin: 5px 5px 5px 0;
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}

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