Ashok PatelIn this article, we will learn how to perform CRUD operations in React Js application using the rest API. I think you are now clear about React Js from previous articles about the React Js framework and you are also familiar with creating React Js applications.
If not then please go through the following articles:
In all the above articles I have explained about basics of the React Js. Now after reading the above article I think you are clear about React Js and creating simple React Js applications.
Whenever we are developing the applications we need a database for storing the data. Here we need to perform CRUD operations in the database table with the help of the rest API.
On various blogs, you can find CRUD operation in React Js. But on many blogs, I have observed they are all using static JSON array to perform the insert update delete in react js.
But in this post, I will explain to you the insert, update, and delete function in the table with the help of the rest API.
Rest API
Rest API has been created in Asp .Net Web Api and MsSql.I have table Employees with column Id,EmployeeName,EmployeeSalary and Adress. Now I want to perform crud operation on this table using the Rest API.You can also use these Apis for your practice purpose.
API Base Url-http://virtualsolution.adequateshop.com:168
API EndPoint-
GET: api/Employee
It will return employees in the database
[
{
"$id": "1",
"Id": 1,
"EmployeeName": "Connor",
"EmployeeSalary": 200000,
"Adress": "Amsterdam, Netherlands"
},
{
"$id": "2",
"Id": 3,
"EmployeeName": "John",
"EmployeeSalary": 20000,
"Adress": "Amsterdam, Netherlands"
},
{
"$id": "3",
"Id": 1005,
"EmployeeName": "John Cartor",
"EmployeeSalary": 5000,
"Adress": "Usa"
}
]
GET: api/Employee?id=2
It will return all employee by Id in the database
{
"$id": "1",
"Id": 3,
"EmployeeName": "John",
"EmployeeSalary": 20000,
"Adress": "Amsterdam, Netherlands"
}
POST: api/Employee
It will create a employee entity in the database
API Request
{
"EmployeeName":"Sammy",
"EmployeeSalary":10000,
"Adress":"Paris, France"
}
API Response 201 created
{
"Id":1005
"EmployeeName":"Sammy",
"EmployeeSalary":10000,
"Adress":"Paris, France"
}
PUT: api/Employee?id=2
It will updtae a employee entity in the database
API Request
{
"Id":1005
"EmployeeName":"Sammy New",
"EmployeeSalary":10000,
"Adress":"Paris, France"
}
API Response- 200 Ok
{
"Id":1005
"EmployeeName":"Sammy New",
"EmployeeSalary":10000,
"Adress":"Paris, France"
}
DELETE:/api/EmployeeEntities?id=1005
It will delete the employee with id=1005 in the database
CRUD Operation in React Js
Step 1-Create React Js Project with the help of npm
npm init react-crud-operation
Step 2-Run below command to install bootstrap and route
npm install react-bootstrap bootstrap
npm install –save react-router-dom
Step 3-Create a “components” folder inside the src folder in our Application.
Step 4-Right-Click “components” folder ->New File and create the class component and I’ll call it Employeelist.js, Addemployee.js, and Editemployee.js
Step 5- Import all component in our App.js file and define the route for each component
App.js
import logo from './logo.svg';
import './App.css';
import Employeelist from "./components/Employeelist";
import Editemployee from "./components/Editemployee";
import Addemployee from "./components/Addemployee";
import { BrowserRouter as Router, Switch, Route } from "react-router-dom";
import 'bootstrap/dist/css/bootstrap.min.css';
function App() {
return (
<div className="container body-content">
<Router>
<Switch>
<Route path="/" exact component={Employeelist} />
<Route path="/editemployee/:id" exact component={Editemployee} />
<Route path="/addemployee" exact component={Addemployee} />
</Switch>
</Router>
</div>
);
}
export default App;
Step 6-Now Let’s implement the logic for showing the list of the employee in the organization.
open Employeelist.js Component and copy-paste the below code.
Employeelist.js
import React from 'react';
import { Table, Button, Alert } from 'react-bootstrap';
import { Link } from "react-router-dom";
import 'bootstrap/dist/css/bootstrap.min.css';
const BaseapiUrl = 'http://virtualsolution.adequateshop.com:168';
class Employeelist extends React.Component {
constructor(props) {
super(props);
this.state = {
employees: [],
IsApiError: false
}
}
componentDidMount() {
debugger;
fetch(BaseapiUrl + "/api/Employee/")
.then(res => res.json())
.then(
(result) => {
debugger;
this.setState({
employees: result
});
},
(error) => {
this.setState({ IsApiError: true });
}
)
}
deleteEmployee(EmpId) {
debugger;
const { employees } = this.state;
const apiUrl = BaseapiUrl + "/api/Employee?id="+EmpId;
fetch(apiUrl, { method: 'DELETE' })
.then(async response => {
const data = await response.json();
// check for error response
if (!response.ok) {
// get error message from body or default to response status
const error = (data && data.message) || response.status;
return Promise.reject(error);
}
this.setState({
employees: employees.filter(employee => employee.Id !== EmpId)
});
alert('Delete successful');
})
.catch(error => {
alert('There was an error!');
console.error('There was an error!', error);
});
}
render() {
var employeeslist = this.state.employees;
debugger;
if (employeeslist && employeeslist.length > 0) {
return (<div>
<h2>Employees List</h2>
<Link variant="primary" to="/addemployee">Add Employee</Link>
{/* {this.state.response.message && <Alert variant="info">{this.state.response.message}</Alert>} */}
<Table className="table" >
<thead>
<tr>
<th>EmpID</th>
<th>Name</th>
<th>Salary</th>
<th>Address</th>
</tr>
</thead>
<tbody>
{employeeslist.map(emp => (
<tr key={emp.Id}>
<td>{emp.Id}</td>
<td>{emp.EmployeeName}</td>
<td>{emp.EmployeeSalary}</td>
<td>{emp.Adress}</td>
<td>
<Link variant="info" to={"/editemployee/" + emp.Id}>Edit</Link>
<Button variant="danger" onClick={() => this.deleteEmployee(emp.Id)}>Delete</Button>
</td>
</tr>
))}
</tbody>
</Table>
</div>)
}
else {
return (<div>No Record Found</div>)
}
}
}
export default Employeelist;
Step 7-Now Let’s write the logic for adding the employee in the organization.
open Addemployee.js Component and copy-paste the below code.
Addemployee.js
import React, { Component } from "react";
import { Row, Form, Col, Button } from 'react-bootstrap';
import { Link } from "react-router-dom";
const BaseapiUrl = 'http://virtualsolution.adequateshop.com:168';
class Addemployee extends Component {
constructor(props) {
super(props);
this.state = {
employeeName: '',
employeeSalary: '',
employeeAddress: ''
}
this.handleChange = this.handleChange.bind(this);
}
handleChange(event) {
const name = event.target.name;
const value = event.target.value;
this.setState({
[name]: value
})
}
AddEmployee() {
debugger;
if (this.state.employeeName == "" || this.state.employeeName == undefined) {
alert("employee Name is required");
} else if (this.state.employeeSalary == "" || this.state.employeeSalary == undefined) {
alert("employee Salary is required");
} else if (this.state.employeeAddress == "" || this.state.employeeAddress == undefined) {
alert("employee Address is required");
}
let MeetingToken = Math.floor(Math.random() * 100000000 + 1);
let body = {
employeeName: this.state.employeeName,
employeeSalary: this.state.employeeSalary,
Adress: this.state.employeeAddress
};
const requestOptions = {
method: "POST",
headers: {
"Content-Type": "application/json",
Accept: "application/json",
},
body: JSON.stringify(body),
};
let baseurl = BaseapiUrl + "/api/Employee/";
fetch(baseurl, requestOptions)
.then((res) => {
return res.json();
})
.then((results) => {
if (results) {
alert("Added successfully!");
this.setState({
employeeName: '',
employeeSalary: '',
employeeAddress: ''
})
}
})
.catch((e) => {
alert(e);
});
}
render() {
return (
<div>
<h1>Add Employee</h1>
<Link variant="primary" to="/">View Employee list</Link>
<Row>
<Col sm={6}>
<Form onSubmit={this.handleSubmit}>
<Form.Group controlId="employeeName">
<Form.Label>Employee Name</Form.Label>
<Form.Control
type="text"
name="employeeName"
value={this.state.employeeName}
onChange={this.handleChange}
placeholder="Employee Name" />
</Form.Group>
<Form.Group controlId="employeeSalary">
<Form.Label>Employee Salary</Form.Label>
<Form.Control
type="text"
name="employeeSalary"
value={this.state.employeeSalary}
onChange={this.handleChange}
placeholder="Employee Salary" />
</Form.Group>
<Form.Group controlId="employeeAddress">
<Form.Label>EmployeeAddress</Form.Label>
<Form.Control
type="text"
name="employeeAddress"
value={this.state.employeeAddress}
onChange={this.handleChange}
placeholder="Address" />
</Form.Group>
<Form.Group>
<Button variant="success" onClick={() => this.AddEmployee()}>Save</Button>
</Form.Group>
</Form>
</Col>
</Row>
</div>
)
}
}
export default Addemployee;
Step 8-Now Let’s write the logic for updating the employee in the organization.
open Editemployee.js Component and copy-paste the below code.
import React, { Component } from "react";
import { Row, Form, Col, Button } from 'react-bootstrap';
import { Link } from "react-router-dom";
const BaseapiUrl = 'http://virtualsolution.adequateshop.com:168';
class Editemployee extends Component {
constructor(props) {
super(props);
this.state = {
employeeName: '',
employeeSalary: '',
employeeAddress: ''
}
this.handleChange = this.handleChange.bind(this);
}
handleChange(event) {
const name = event.target.name;
const value = event.target.value;
this.setState({
[name]: value
})
}
componentDidMount(props) {
var Empid = this.props.match.params.id;
this.GetEmployeeById(Empid);
}
GetEmployeeById(Empid) {
const apiUrl = BaseapiUrl + "api/Employee?id=" + Empid;
fetch(apiUrl)
.then(res => res.json())
.then(
(result) => {
debugger;
if (result) {
this.setState({
employeeName: result.EmployeeName,
employeeSalary:result.EmployeeSalary,
employeeAddress:result.Adress
});
}
else {
alert("employeee record not found!")
}
},
(error) => {
this.setState({ IsApiError: true });
}
)
}
UpdateEmployee() {
debugger;
if (this.state.employeeName == "" || this.state.employeeName == undefined) {
alert("employee Name is required");
} else if (this.state.employeeSalary == "" || this.state.employeeSalary == undefined) {
alert("employee Salary is required");
} else if (this.state.employeeAddress == "" || this.state.employeeAddress == undefined) {
alert("employee Address is required");
}
let MeetingToken = Math.floor(Math.random() * 100000000 + 1);
let body = {
Id:this.props.match.params.id,
employeeName: this.state.employeeName,
employeeSalary: this.state.employeeSalary,
Adress: this.state.employeeAddress
};
const requestOptions = {
method: 'PUT',
headers: {
"Content-Type": "application/json",
Accept: "application/json",
},
body: JSON.stringify(body),
};
let baseurl = BaseapiUrl + "/api/Employee?id="+this.props.match.params.id;
fetch(baseurl, requestOptions)
.then((res) => {
return res.json();
})
.then((results) => {
if (results) {
alert("Updated successfully!");
}
})
.catch((e) => {
alert(e);
});
}
render() {
return (
<div>
<h1>Edit Employee</h1>
<Link variant="primary" to="/">View Employee list</Link>
<Row>
<Col sm={6}>
<Form onSubmit={this.handleSubmit}>
<Form.Group controlId="employeeName">
<Form.Label>Employee Name</Form.Label>
<Form.Control
type="text"
name="employeeName"
value={this.state.employeeName}
onChange={this.handleChange}
placeholder="Employee Name" />
</Form.Group>
<Form.Group controlId="employeeSalary">
<Form.Label>Employee Salary</Form.Label>
<Form.Control
type="text"
name="employeeSalary"
value={this.state.employeeSalary}
onChange={this.handleChange}
placeholder="Employee Salary" />
</Form.Group>
<Form.Group controlId="employeeAddress">
<Form.Label>EmployeeAddress</Form.Label>
<Form.Control
type="text"
name="employeeAddress"
value={this.state.employeeAddress}
onChange={this.handleChange}
placeholder="Address" />
</Form.Group>
<Form.Group>
<Button variant="success" onClick={() => this.UpdateEmployee()}>Save</Button>
</Form.Group>
</Form>
</Col>
</Row>
</div>
)
}
}
export default Editemployee;
In this post, I have tried to explain the insert, update, and delete action step by step in ReactJS. I have embedded screenshots of each action so that you can easily complete this task on your PC. Believe me, once after this task your understanding of ReactJS, will be improved at a great level.
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