CollectionView Filtering (Angular)

The CollectionView has a filter property that can be used to specify a filter function. The filter function defines which items should be included in the view when the filter is applied. The sample below provides some predefined 'select' filters defined by the filter function.

Learn about FlexGrid | Creating Views Documentation | CollectionView API Reference

This example uses Angular.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import * as wijmo from '@mescius/wijmo'; // import '@angular/compiler'; import { Component, Inject, enableProdMode, NgModule } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import { WjGridModule } from '@mescius/wijmo.angular2.grid'; import { DataService, TDataItem } from './app.data'; // @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { view: wijmo.CollectionView; // constructor(@Inject(DataService) private dataService: DataService) { this.view = new wijmo.CollectionView(dataService.getData()); // // change the filter document.addEventListener('change', e => { let filterType = (<HTMLInputElement>e.target).value; // this.view.filter = (item: TDataItem) => { switch (filterType) { case 'country': return item.country == 'US'; case 'sales': return item.sales > 9000; case 'downloads': return item.downloads > 19000; default: return true; } } }); } } // @NgModule({ imports: [WjGridModule, BrowserModule], declarations: [AppComponent], providers: [DataService], bootstrap: [AppComponent] }) export class AppModule { } // enableProdMode(); // Bootstrap application with hash style navigation and global services. platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo CollectionView Filtering Overview</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Polyfills --> <script src="node_modules/core-js/client/shim.min.js"></script> <script src="node_modules/zone.js/fesm2015/zone.min.js"></script> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> // workaround to load 'rxjs/operators' from the rxjs bundle System.import('rxjs').then(function (m) { System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators)); System.import('./src/app.component'); }); </script> </head> <body> <app-component></app-component> </body> </html>
<div class="container-fluid"> <label> <input type="radio" name="filter" value="" [checked]="true" /> No Filter </label> <label> <input type="radio" name="filter" value="country" /> US only </label> <label> <input type="radio" name="filter" value="sales" /> Sales > 9,000 </label> <label> <input type="radio" name="filter" value="downloads" /> Downloads > 19,000 </label> <p> Result ({{ view.items.length | number:0 }} items): </p> <wj-flex-grid [itemsSource]="view" [alternatingRowStep]="0" [headersVisibility]="'Column'"> </wj-flex-grid> </div>
import { Injectable } from '@angular/core'; // export type TDataItem = { id: number; country: string; downloads: number; sales: number; expenses: number; } // @Injectable() export class DataService { getData() { let countries = ['US', 'Germany', 'UK', 'Japan', 'Italy', 'Greece'], data: TDataItem[] = []; // for (let i = 0; i < 1000; i++) { data.push({ id: i, country: countries[i % countries.length], downloads: Math.round(Math.random() * 20000), sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } // return data; } }
.wj-flexgrid { max-height: 250px; } label { width: 100% }
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packages: { "./src": { defaultExtension: 'ts' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);