Implement MultiSelect DropDowns Using React-Select

Sanwar Ranwa
Jan 24, 2020

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Introduction

In this article, we will learn how we can create searchable and multi select dropdown in React.js using react-select library.

Prerequisites

We should have basic knowledge of React.js and Web API.
Visual Studio and Visual Studio Code IDE should be installed on your system.
SQL Server Management Studio
Basic knowledge of Bootstrap
Axios Installed

Create ReactJS project

Now, let's first create a React application with the following command.

npx create-react-app matform

Now install react-select using the following command.

npm install react-select --save

Now install Bootstrap by using the following commands.

npm install --save bootstrap

Now, open the index.js file and add import Bootstrap.

import 'bootstrap/dist/css/bootstrap.min.css';

Now install the Axios library by using the following command. Learn more about Axios

npm install --save axios

Now go to the src folder and add a new component, named 'Reactsel.js'. and import react-select package.

import Select from 'react-select';

Add the following code.

import React, { Component } from 'react'
import Select from 'react-select';
import axios from 'axios';
export class Reactsel extends Component {
constructor(props) {
super(props)
this.state = {
country: []
}
}
componentWillMount() {
axios.get('http://localhost:51983/Api/autoComplete/Countrylist').then(response => {
console.log(response);
this.setState({
country: response.data
})
})
}
Country() {
return (this.state.country.map(data => ({ label: data.Name, value: data.Id })))
}
render() {
return (
<>
<div style={{ margin: "10px" }} class="row" className="hdr">
<div class="col-sm-12 btn btn-warning">
React Select
</div>
</div>
<div className="container">
<div className="row">
<div className="col-md-3"></div>
<div className="col-md-6">
<Select options={this.Country()} />
</div>
<div className="col-md-4"></div>
</div>
</div>
</>
)
}
}
export default Reactsel

Now run the project by using 'npm start' and check result.

Now add another component,named 'Multiselect.js' and add the following code

import React, { Component } from 'react';
import Select from 'react-select';
import makeAnimated from 'react-select/animated';
import axios from 'axios';
const animatedComponents = makeAnimated();
export class Multiselect extends Component {
constructor(props) {
super(props)
this.state = {
country: [],
}
}
componentWillMount() {
axios.get('http://localhost:51983/Api/autoComplete/Countrylist').then(response => {
console.log(response);
this.setState({
country: response.data
})
})
}
Country() {
return (this.state.country.map(data => ({ label: data.Name, value: data.Id })))
}
render() {
return (
<>
<div style={{ margin: "10px" }} class="row" className="hdr">
<div class="col-sm-12 btn btn-warning">
React Select
</div>
</div>
<div className="container">
<div className="row">
<div className="col-md-3"></div>
<div className="col-md-6">
<Select options={this.Country()} components={animatedComponents}
isMulti />
</div>
<div className="col-md-4"></div>
</div>
</div>
</>
)
}
}
export default Multiselect

Now open app.js file and add the following code:

import React from 'react';
import logo from './logo.svg';
import './App.css';
import Multiselect from './Multiselect'
import Reactsel from "./Reactsel";
function App() {
return (
<div className="App">
<Multiselect />
</div>
);
}
export default App;

Run the project and check result.

Implement MultiSelect DropDowns Using React-Select

Create a table in the database

Open SQL Server Management Studio, create a table:

CREATE TABLE [dbo].[TblCountry](
[Id] [int] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](50) NULL,
CONSTRAINT [PK_TblCountry] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO

Create a new Web API project

Open Visual Studio and create a new project:

Change the name to autocomplete.

Choose the template as Web API.

Right-click the Models folder from Solution Explorer and go to Add >> New Item >> data.

Click on the "ADO.NET Entity Data Model" option and click "Add".

Select EF Designer from the database and click the "Next" button.

Add the connection properties and select database name on the next page and click OK.

Check the "Table" checkbox. The internal options will be selected by default. Now, click OK

Now, our data model is successfully created.

Right-click on the Controllers folder and add a new controller. Name it as "Autocomplete controller" and add the following namespace in the Autocomplete controller.

using AutoComplete.Models;

Now add a method to fetch data from database.

public object Getrecord()
{
var data= DB.TblCountries.ToList();
return data;
}

Complete Autocomplete controller code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using AutoComplete.Models;
namespace AutoComplete.Controllers
{
[RoutePrefix("Api/autoComplete")]
public class AutoCompleteController : ApiController
{
AutoCompleteEntities2 DB = new AutoCompleteEntities2();
[HttpGet]
[Route("Countrylist")]
public object Getrecord()
{
var data= DB.TblCountries.ToList();
return data;
}
}
}

Now, let's enable CORS. Go to Tools, open NuGet Package Manager, search for CORS, and install the "Microsoft.Asp.Net.WebApi.Cors" package. Open Webapiconfig.cs and add the following lines.