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CheckBox in Angular MultiSelect component

The MultiSelect has built-in support to select multiple values through checkbox, when mode property set as CheckBox.

To use checkbox, inject the CheckBoxSelection module in the MultiSelect.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, OnInit } from '@angular/core';
import { CheckBoxSelectionService, FilteringEventArgs } from '@syncfusion/ej2-angular-dropdowns';
@Component({
    selector: 'app-root',
    // specifies the template string for the MultiSelect component
    template: `<ejs-multiselect id='multiselectelement' [dataSource]='sportsData' [fields]='fields'(filtering)='onFiltering($event)' [mode]='mode' [placeholder]='placeholder'></ejs-multiselect>`,
    providers: [CheckBoxSelectionService]
})
export class AppComponent {
    public mode: string;
    constructor() {
    }
    //set the data to dataSource property
    public sportsData: Object[] =  [
        { id: 'Game1', sports: 'Badminton' },
        { id: 'Game2', sports: 'Basketball' },
        { id: 'Game3', sports: 'Cricket' },
        { id: 'Game4', sports: 'Football' },
        { id: 'Game5', sports: 'Golf' }
    ];
    // maps the appropriate column to fields property
    public fields: Object = { text: 'sports', value: 'id' };
    // set placeholder to MultiSelect input element
    public placeholder: string = 'Select games';
    //Bind the filter event
    public onFiltering: EmitType =  (e: FilteringEventArgs) => {
        let query = new Query();
        //frame the query based on search string with filter type.
        query = (e.text != "") ? query.where("country", "startswith", e.text, true) : query;
        //pass the filter data source, filter query to updateData method.
        e.updateData(this.searchData, query);
    };
    ngOnInit(): void {
        // set the type of mode for checkbox to visualized the checkbox added in li element.
        this.mode = 'CheckBox';
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { MultiSelectModule } from '@syncfusion/ej2-angular-dropdowns';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,FormsModule, MultiSelectModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Select All

The MultiSelect component has in-built support to select the all list items using Select All options in the header.

When the showSelectAll property is set to true, by default Select All text will show. You can customize the name attribute of the Select All option by using selectAllText.

For the unSelect All option, by default unSelect All text will show. You can customize the name attribute of the unSelect All option by using unSelectAllText.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, OnInit } from '@angular/core';
import { CheckBoxSelectionService } from '@syncfusion/ej2-angular-dropdowns';
@Component({
    selector: 'app-root',
    // specifies the template string for the MultiSelect component
    template: `<ejs-multiselect id='multiselectelement' [dataSource]='sportsData' [fields]='fields' [mode]='mode' [selectAllText]='selectAllText' showSelectAll=true [placeholder]='placeholder'></ejs-multiselect>`,
    providers: [CheckBoxSelectionService]
})
export class AppComponent {
    public mode: string;
    public selectAllText: string
    constructor() {
    }
    //set the data to dataSource property
    public sportsData: Object[] =  [
        { id: 'Game1', sports: 'Badminton' },
        { id: 'Game2', sports: 'Basketball' },
        { id: 'Game3', sports: 'Cricket' },
        { id: 'Game4', sports: 'Football' },
        { id: 'Game5', sports: 'Golf' }
    ];
    // maps the appropriate column to fields property
    public fields: Object = { text: 'sports', value: 'id' };
    // set placeholder to MultiSelect input element
    public placeholder: string = 'Select games';
    ngOnInit(): void {
        // set the type of mode for checkbox to visualized the checkbox added in li element.
        this.mode = 'CheckBox';
        // set the select all text to MultiSelect checkbox label.
        this.selectAllText= 'Select All';
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { MultiSelectModule } from '@syncfusion/ej2-angular-dropdowns';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,FormsModule, MultiSelectModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Selection Limit

Defines the limit of the selected items using maximumSelectionLength.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, OnInit } from '@angular/core';
import { CheckBoxSelectionService } from '@syncfusion/ej2-angular-dropdowns';

@Component({
    selector: 'app-root',
    // specifies the template string for the MultiSelect component
    template: `<ejs-multiselect id='multiselectelement' [dataSource]='sportsData' [fields]='fields' [mode]='mode' [maximumSelectionLength]='maximumSelectionLength' [placeholder]='placeholder'></ejs-multiselect>`,
    providers: [CheckBoxSelectionService]
})
export class AppComponent {
    public mode: string;
    public maximumSelectionLength: number;
    constructor() {
    }
    //set the data to dataSource property
    public sportsData: Object[] =  [
        { id: 'Game1', sports: 'Badminton' },
        { id: 'Game2', sports: 'Basketball' },
        { id: 'Game3', sports: 'Cricket' },
        { id: 'Game4', sports: 'Football' },
        { id: 'Game5', sports: 'Golf' }
    ];
    // maps the appropriate column to fields property
    public fields: Object = { text: 'sports', value: 'id' };
    // set placeholder to MultiSelect input element
    public placeholder: string = 'Select games';
    ngOnInit(): void {
        // set the type of mode for checkbox to visualized the checkbox added in li element.
        this.mode = 'CheckBox';
        // Sets limitation to the value selection
        this.maximumSelectionLength = 3;
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { MultiSelectModule } from '@syncfusion/ej2-angular-dropdowns';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,FormsModule, MultiSelectModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Selection Reordering

Using enableSelectionOrder to Reorder the selected items in popup visibility state.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, OnInit } from '@angular/core';
import { CheckBoxSelectionService } from '@syncfusion/ej2-angular-dropdowns';

@Component({
    selector: 'app-root',
    // specifies the template string for the MultiSelect component
    template: `<ejs-multiselect id='multiselectelement' [dataSource]='sportsData' [fields]='fields' [mode]='mode' [enableSelectionOrder]='false' [placeholder]='placeholder'></ejs-multiselect>`,
    providers: [CheckBoxSelectionService]
})
export class AppComponent {
    public mode: string;
    constructor() {
    }
    //set the data to dataSource property
    public sportsData: Object[] =  [
        { id: 'Game1', sports: 'Badminton' },
        { id: 'Game2', sports: 'Basketball' },
        { id: 'Game3', sports: 'Cricket' },
        { id: 'Game4', sports: 'Football' },
        { id: 'Game5', sports: 'Golf' }
    ];
    // maps the appropriate column to fields property
    public fields: Object = { text: 'sports', value: 'id' };
    // set placeholder to MultiSelect input element
    public placeholder: string = 'Select games';

    ngOnInit(): void {
        // set the type of mode for checkbox to visualized the checkbox added in li element.
        this.mode = 'CheckBox';
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { MultiSelectModule } from '@syncfusion/ej2-angular-dropdowns';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,FormsModule, MultiSelectModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

See Also