Add item in React Drop down list component

2 Feb 20238 minutes to read

You can add item in between based on item index. If you add new item without item index, item will be added as last item in list.

The following example demonstrate how to add item in between in DropDownList.

index.jsx

import { DropDownListComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
export default class App extends React.Component {
    // define the JSON of data
    sportsData = [
        { Id: 'game1', Game: 'Badminton' },
        { Id: 'game2', Game: 'Football' },
        { Id: 'game3', Game: 'Tennis' }
    ];
    dropDownListObject;
    // maps the appropriate column to fields property
    fields = { text: 'Game', value: 'Id' };
    onclickfirst() {
        this.dropDownListObject.addItem({ Id: 'game0', Game: 'Hockey' }, 0);
    }
    onclick() {
        this.dropDownListObject.addItem({ Id: 'game4', Game: 'Golf' }, 2);
    }
    onclicklast() {
        this.dropDownListObject.addItem({ Id: 'game5', Game: 'Cricket' });
    }
    render() {
        return (
        // specifies the tag for render the DropDownList component
        <div>
                <DropDownListComponent id="ddlelement" ref={(scope) => { this.dropDownListObject = scope; }} dataSource={this.sportsData} fields={this.fields} placeholder="Select a game"/>
                <div id="btn1Div">
                <button id='btn' className="e-control e-btn" onClick={this.onclickfirst = this.onclickfirst.bind(this)}>
                add item (Hockey) in first</button>
            </div>
            <div id="btn2Div">
                <button id='btn2' className="e-control e-btn" onClick={this.onclick = this.onclick.bind(this)}> add item (Golf) in between</button>
            </div>
            <div id="btn3Div">
                <button id='btn3' className="e-control e-btn" onClick={this.onclicklast = this.onclicklast.bind(this)}>
                  add item (Cricket) in last</button>
            </div>
            </div>);
    }
}
ReactDOM.render(<App />, document.getElementById('sample'));

index.tsx

import { DropDownListComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';

export default class App extends React.Component<{}, {}> {

    // define the JSON of data
    private sportsData: { [key: string]: Object }[] = [
        { Id: 'game1', Game: 'Badminton' },
        { Id: 'game2', Game: 'Football' },
        { Id: 'game3', Game: 'Tennis' }
    ];
    private dropDownListObject: any;
    // maps the appropriate column to fields property
    private fields: object = { text: 'Game', value: 'Id' };
    public onclickfirst(){
    this.dropDownListObject.addItem({Id: 'game0', Game: 'Hockey'}, 0);
    }
    public onclick(){
    this.dropDownListObject.addItem({Id: 'game4', Game: 'Golf'}, 2);
    }
    public onclicklast(){
    this.dropDownListObject.addItem({Id: 'game5', Game: 'Cricket'});
    }
    public render() {
        return (
             // specifies the tag for render the DropDownList component
            <div>
                <DropDownListComponent id="ddlelement" ref={(scope) => { this.dropDownListObject = scope; }}dataSource={this.sportsData} fields={this.fields} placeholder="Select a game" />
                <div id="btn1Div">
                <button id='btn' className="e-control e-btn" onClick={this.onclickfirst = this.onclickfirst.bind(this)}>
                add item (Hockey) in first</button>
            </div>
            <div id="btn2Div">
                <button id='btn2' className="e-control e-btn" onClick={ this.onclick = this.onclick.bind(this)}> add item (Golf) in between</button>
            </div>
            <div id="btn3Div">
                <button id='btn3' className="e-control e-btn" onClick={this.onclicklast = this.onclicklast.bind(this)}>
                  add item (Cricket) in last</button>
            </div>
            </div>
        );
    }
}
ReactDOM.render(<App />, document.getElementById('sample'));