MultiSelect without $checked Property (Angular)

The MultiSelect control requires a data member to determine whether items are selected. If one is not provided, the control adds a $checked property to the data items. You can prevent this by creating a dedicated itemsSource that contains objects with two properties: the original item and the checked member.

Learn about Input Controls | No Checked Items Documentation | MultiSelect API Reference

This example uses Angular.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import * as input from '@mescius/wijmo.input'; // import '@angular/compiler'; import { Component, enableProdMode, Inject, ɵresolveComponentResources } from '@angular/core'; import { BrowserModule, bootstrapApplication } from '@angular/platform-browser'; import { WjInputModule } from '@mescius/wijmo.angular2.input'; import { DataService } from './app.data'; // @Component({ standalone: true, providers: [DataService], imports: [WjInputModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html', }) export class AppComponent { data: any; // constructor(@Inject(DataService) private dataService: DataService) { // create a data source with items and an extra checkable member this.data = dataService.getData().map((item) => ({ item: item, checked: false })); } // getCheckedItems(ctrl: input.MultiSelect): string { let items = ctrl.checkedItems.map((checkableItem) => checkableItem.item); return JSON.stringify(items); } } // // enableProdMode(); // Resolve resources (templateUrl, styleUrls etc), After resolution all URLs have been converted into `template` strings. ɵresolveComponentResources(fetch).then(() => { // Bootstrap application bootstrapApplication(AppComponent).catch((err) => console.error(err)); });
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo MultiSelect - no $checked property</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>
<main class="container-fluid"> <div class="row"> <div class="col-xs-4"> <wj-multi-select #theMultiSelect [placeholder]="'Devices'" [displayMemberPath]="'item.name'" [checkedMemberPath]="'checked'" [itemsSource]="data"></wj-multi-select> </div> <div class="col-xs-8"> <p> <b>Checked Items:</b> </p> @if (theMultiSelect.checkedItems.length > 0) { <p> {{ getCheckedItems(theMultiSelect) }} </p> } </div> </div> </main>
import { Injectable } from '@angular/core'; // @Injectable() export class DataService { getData() { return [ { "specific_type": "3067VIP10G-3G", "name": "My Crazy VIP", "generic_type": "vip10g", "id": 2, "model": "3067VIP10G-3G", "properties": { "ndisplays": 1, "addr2": { "port": 9700 }, "snmp_monitor_port": 161, "nvidinputs": 36, "addr1": { "ip": "127.0.0.12", "port": 9700 } } }, { "specific_type": "EXE", "name": "My Crazy EXE", "generic_type": "exe", "id": 3, "model": "EXE", "properties": { "nports": 1152, "addr2": { "port": 9671 }, "snmp_monitor_port": 161, "addr1": { "ip": "127.0.0.1", "port": 9671 } } }, { "specific_type": "3067VIP10G-3G", "name": "Another VIP", "generic_type": "vip10g", "id": 4, "model": "3067VIP10G-3G", "properties": { "ndisplays": 1, "addr2": { "port": 9700 }, "snmp_monitor_port": 161, "nvidinputs": 36, "addr1": { "ip": "127.0.0.1", "port": 9700 } } }, { "specific_type": "570IPG-3G18-SFPP12", "name": "My Crazy IPG", "generic_type": "ipg", "id": 1, "model": "570IPG-3G18-SFPP12", "properties": { "addr2": { "port": 161 }, "snmp_monitor_port": 161, "addr1": { "ip": "127.0.0.1", "port": 161 } } } ]; } }
body { margin-bottom: 24pt; }
(function (global) { SystemJS.config({ transpiler: './plugin-typescript.js', typescriptOptions: { "target": "ES2022", "module": "system", "emitDecoratorMetadata": true, "experimentalDecorators": true, }, baseURL: 'node_modules/', meta: { 'typescript': { "exports": "ts" }, '*.css': { loader: 'systemjs-plugin-css' }, '*.mjs': { format: 'esm' }, }, paths: { // paths serve as alias 'npm:': '' }, packageConfigPaths: [ '/node_modules/*/package.json', "/node_modules/@angular/*/package.json", "/node_modules/@mescius/*/package.json" ], map: { 'core-js': 'https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js', 'typescript': 'https://cdnjs.cloudflare.com/ajax/libs/typescript/5.2.2/typescript.min.js', "rxjs": "https://cdnjs.cloudflare.com/ajax/libs/rxjs/7.8.1/rxjs.umd.min.js", 'systemjs-plugin-css': 'https://cdn.jsdelivr.net/npm/systemjs-plugin-css@0.1.37/css.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 'npm:@mescius/wijmo.chart.finance.analytics/index.js', '@mescius/wijmo.chart.hierarchical': 'npm:@mescius/wijmo.chart.hierarchical/index.js', '@mescius/wijmo.chart.interaction': 'npm:@mescius/wijmo.chart.interaction/index.js', '@mescius/wijmo.chart.radar': 'npm:@mescius/wijmo.chart.radar/index.js', '@mescius/wijmo.chart.render': 'npm:@mescius/wijmo.chart.render/index.js', '@mescius/wijmo.chart.webgl': 'npm:@mescius/wijmo.chart.webgl/index.js', '@mescius/wijmo.chart.map': 'npm:@mescius/wijmo.chart.map/index.js', '@mescius/wijmo.gauge': 'npm:@mescius/wijmo.gauge/index.js', '@mescius/wijmo.grid': 'npm:@mescius/wijmo.grid/index.js', '@mescius/wijmo.grid.detail': 'npm:@mescius/wijmo.grid.detail/index.js', '@mescius/wijmo.grid.filter': 'npm:@mescius/wijmo.grid.filter/index.js', '@mescius/wijmo.grid.search': 'npm:@mescius/wijmo.grid.search/index.js', '@mescius/wijmo.grid.style': 'npm:@mescius/wijmo.grid.style/index.js', '@mescius/wijmo.grid.grouppanel': 'npm:@mescius/wijmo.grid.grouppanel/index.js', '@mescius/wijmo.grid.multirow': 'npm:@mescius/wijmo.grid.multirow/index.js', '@mescius/wijmo.grid.transposed': 'npm:@mescius/wijmo.grid.transposed/index.js', '@mescius/wijmo.grid.transposedmultirow': 'npm:@mescius/wijmo.grid.transposedmultirow/index.js', '@mescius/wijmo.grid.pdf': 'npm:@mescius/wijmo.grid.pdf/index.js', '@mescius/wijmo.grid.sheet': 'npm:@mescius/wijmo.grid.sheet/index.js', '@mescius/wijmo.grid.xlsx': 'npm:@mescius/wijmo.grid.xlsx/index.js', '@mescius/wijmo.grid.selector': 'npm:@mescius/wijmo.grid.selector/index.js', '@mescius/wijmo.grid.cellmaker': 'npm:@mescius/wijmo.grid.cellmaker/index.js', '@mescius/wijmo.nav': 'npm:@mescius/wijmo.nav/index.js', '@mescius/wijmo.odata': 'npm:@mescius/wijmo.odata/index.js', '@mescius/wijmo.olap': 'npm:@mescius/wijmo.olap/index.js', '@mescius/wijmo.rest': 'npm:@mescius/wijmo.rest/index.js', '@mescius/wijmo.pdf': 'npm:@mescius/wijmo.pdf/index.js', '@mescius/wijmo.pdf.security': 'npm:@mescius/wijmo.pdf.security/index.js', '@mescius/wijmo.viewer': 'npm:@mescius/wijmo.viewer/index.js', '@mescius/wijmo.xlsx': 'npm:@mescius/wijmo.xlsx/index.js', '@mescius/wijmo.undo': 'npm:@mescius/wijmo.undo/index.js', '@mescius/wijmo.interop.grid': 'npm:@mescius/wijmo.interop.grid/index.js', '@mescius/wijmo.touch': 'npm:@mescius/wijmo.touch/index.js', '@mescius/wijmo.cloud': 'npm:@mescius/wijmo.cloud/index.js', '@mescius/wijmo.barcode': 'npm:@mescius/wijmo.barcode/index.js', '@mescius/wijmo.barcode.common': 'npm:@mescius/wijmo.barcode.common/index.js', '@mescius/wijmo.barcode.composite': 'npm:@mescius/wijmo.barcode.composite/index.js', '@mescius/wijmo.barcode.specialized': 'npm:@mescius/wijmo.barcode.specialized/index.js', "@mescius/wijmo.angular2.chart.analytics": "npm:@mescius/wijmo.angular2.chart.analytics/index.js", "@mescius/wijmo.angular2.chart.animation": "npm:@mescius/wijmo.angular2.chart.animation/index.js", "@mescius/wijmo.angular2.chart.annotation": "npm:@mescius/wijmo.angular2.chart.annotation/index.js", "@mescius/wijmo.angular2.chart.finance.analytics": "npm:@mescius/wijmo.angular2.chart.finance.analytics/index.js", "@mescius/wijmo.angular2.chart.finance": "npm:@mescius/wijmo.angular2.chart.finance/index.js", "@mescius/wijmo.angular2.chart.hierarchical": "npm:@mescius/wijmo.angular2.chart.hierarchical/index.js", "@mescius/wijmo.angular2.chart.interaction": "npm:@mescius/wijmo.angular2.chart.interaction/index.js", "@mescius/wijmo.angular2.chart.radar": "npm:@mescius/wijmo.angular2.chart.radar/index.js", '@mescius/wijmo.angular2.chart.map': 'npm:@mescius/wijmo.angular2.chart.map/index.js', "@mescius/wijmo.angular2.chart": "npm:@mescius/wijmo.angular2.chart/index.js", "@mescius/wijmo.angular2.core": "npm:@mescius/wijmo.angular2.core/index.js", "@mescius/wijmo.angular2.gauge": "npm:@mescius/wijmo.angular2.gauge/index.js", "@mescius/wijmo.angular2.grid.detail": "npm:@mescius/wijmo.angular2.grid.detail/index.js", "@mescius/wijmo.angular2.grid.filter": "npm:@mescius/wijmo.angular2.grid.filter/index.js", "@mescius/wijmo.angular2.grid.grouppanel": "npm:@mescius/wijmo.angular2.grid.grouppanel/index.js", "@mescius/wijmo.angular2.grid.search": "npm:@mescius/wijmo.angular2.grid.search/index.js", "@mescius/wijmo.angular2.grid.multirow": "npm:@mescius/wijmo.angular2.grid.multirow/index.js", "@mescius/wijmo.angular2.grid.sheet": "npm:@mescius/wijmo.angular2.grid.sheet/index.js", '@mescius/wijmo.angular2.grid.transposed': 'npm:@mescius/wijmo.angular2.grid.transposed/index.js', '@mescius/wijmo.angular2.grid.transposedmultirow': 'npm:@mescius/wijmo.angular2.grid.transposedmultirow/index.js', "@mescius/wijmo.angular2.grid": "npm:@mescius/wijmo.angular2.grid/index.js", "@mescius/wijmo.angular2.input": "npm:@mescius/wijmo.angular2.input/index.js", "@mescius/wijmo.angular2.olap": "npm:@mescius/wijmo.angular2.olap/index.js", "@mescius/wijmo.angular2.viewer": "npm:@mescius/wijmo.angular2.viewer/index.js", "@mescius/wijmo.angular2.nav": "npm:@mescius/wijmo.angular2.nav/index.js", "@mescius/wijmo.angular2.directivebase": "npm:@mescius/wijmo.angular2.directivebase/index.js", '@mescius/wijmo.angular2.barcode.common': 'npm:@mescius/wijmo.angular2.barcode.common/index.js', '@mescius/wijmo.angular2.barcode.composite': 'npm:@mescius/wijmo.angular2.barcode.composite/index.js', '@mescius/wijmo.angular2.barcode.specialized': 'npm:@mescius/wijmo.angular2.barcode.specialized/index.js', 'bootstrap.css': 'npm:bootstrap/dist/css/bootstrap.min.css', 'jszip': 'https://cdnjs.cloudflare.com/ajax/libs/jszip/3.10.1/jszip.min.js', '@angular/core': 'npm:@angular/core/fesm2022/core.mjs', '@angular/core/primitives/di': 'npm:@angular/core/fesm2022/primitives/di.mjs', '@angular/core/primitives/signals': 'npm:@angular/core/fesm2022/primitives/signals.mjs', '@angular/core/primitives/event-dispatch': 'npm:@angular/core/fesm2022/primitives/event-dispatch.mjs', '@angular/common': 'npm:@angular/common/fesm2022/common.mjs', '@angular/common/http': 'npm:@angular/common/fesm2022/http.mjs', '@angular/compiler': 'npm:@angular/compiler/fesm2022/compiler.mjs', '@angular/platform-browser': 'npm:@angular/platform-browser/fesm2022/platform-browser.mjs', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/fesm2022/platform-browser-dynamic.mjs', '@angular/http': 'npm:@angular/http/fesm2022/http.mjs', '@angular/router': 'npm:@angular/router/fesm2022/router.mjs', '@angular/forms': 'npm:@angular/forms/fesm2022/forms.mjs', }, // packages tells the System loader how to load when no filename and/or no extension packages: { "./src": { defaultExtension: 'ts' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);