C# Programming Tutorial(8920128728): How to Login With Gmail Using ReactJS?

In this article, we will learn the step-by-step process of allowing users to log in to an application with Gmail using ReactJS. Logging in with Gmail makes it safe and easy for users to use applications. When a user clicks on the Login with Gmail button, the user is navigated Google to give the app permission. In response, the user receives a token key and other personal details.

Prerequisites

Basic knowledge of ReactJS and Web API
Visual Studio and Visual Studio code
SQL Server Management Studio

Topics Covered in this Article

Create a ReactJS Project
Install react-google-login React plugin
Install Axios and Bootstrap
Add React Router
Install Bootstrap and React strap
Create a Google App and get client Id
Create a database and table
Create a Web API Project

Create a ReactJS project by using the following command:

npx create-react-app sociallogin     

Open the newly-created project in Visual Studio code and install react-google-login React plugin using the following command

npm install react-google-login --save   

Now install Bootstrap in this project by using the following command.

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        

Create a Google App and Get client Id. The first thing we need is to create a Google Project to get user credentials. Go to the Google API Console and click on Credentials. Click on Create Credentials and choose OAuth client ID.

Select web application, enter your project URL and click on the Create button.

Creating OAuth client ID

It will create a client ID and secret key.

Now, in Visual Studio code, go to src folder and create a new folder and inside this folder add 2 new components

1.Logintbygoogle.js

2. Dashboard.js

Add Routing in ReactJS

Install react-router-dom package by using the following command

npm install react-router-dom --save  

Open app.js file and imports of Router and Route (react-router-dom) and 2 components.

import Logintbygoogle from './Logintbygoogle'    
import Dashboard from "./Dashboard";    
import { BrowserRouter as Router, Switch, Route, Link } from 'react-router-dom';     

Add the following code in app.js file:

import React from 'react';    
import logo from './logo.svg';    
import './App.css';    
import Logintbygoogle from './Logintbygoogle'    
import Dashboard from "./Dashboard";    
import { BrowserRouter as Router, Switch, Route, Link } from 'react-router-dom';     
function App() {    
  return (    
    <>    
   <div className="App">      
     <Router>        
      <div className="container">       
        <Switch>        
          <Route exact path='/' component={Logintbygoogle} />        
          <Route path='/Dashboard' component={Dashboard} />         
        </Switch>        
      </div>        
    </Router>        
    </div>      
   </>    
  );    
}    
    
export default App;   

Now, open the Logintbygoogle.js file and add the following code.

import React, { Component } from 'react'    
import FacebookLogin from 'react-facebook-login';    
import GoogleLogin from 'react-google-login';    
import { Redirect } from 'react-router-dom';    
import axios from 'axios'    
    
export class Logintbygoogle extends Component {    
  constructor(props) {    
    super(props);    
    this.state = {    
    
    };    
  }    
  signup(res) {    
    const googleresponse = {    
      Name: res.profileObj.name,    
      email: res.profileObj.email,    
      token: res.googleId,    
      Image: res.profileObj.imageUrl,    
      ProviderId: 'Google'    
    
    };    
    
    debugger;    
    axios.post('http://localhost:60200/Api/Login/SocialmediaData', googleresponse)    
      .then((result) => {    
        let responseJson = result;    
        console.log(result.data.name);    
        alert("data");    
        sessionStorage.setItem("userData", JSON.stringify(result));    
        this.props.history.push('/Dashboard')    
      });    
  };    
  render() {    
    const responseGoogle = (response) => {    
      console.log(response);    
      var res = response.profileObj;    
      console.log(res);    
      debugger;    
      this.signup(response);    
    }    
    return (    
      <div className="App">    
        <div className="row">    
          <div className="col-sm-12 btn btn-info">    
            Login With Google Using ReactJS    
            </div>    
        </div>    
        <div className="row">    
          <div style={{ 'paddingTop': "20px" }} className="col-sm-12">    
            <div className="col-sm-4"></div>    
            <div className="col-sm-4">    
              <GoogleLogin    
                clientId="788786912619-grj4cpmh0mcd35r1bjji09j2qicanv0f.apps.googleusercontent.com"    
                buttonText="Login with Google"    
                onSuccess={responseGoogle}    
                onFailure={responseGoogle} />    
            </div>    
            <div className="col-sm-4"></div>    
          </div>    
        </div>    
      </div>    
    )    
  }    
}    
    
export default Logintbygoogle     

Now, open the Dashboard .js file and add the following code.

import React, { Component } from 'react'    
    
export class Dashboard extends Component {    
        constructor(props){    
                super(props);    
                this.state = {    
                name:'',    
                };    
               }    
  componentDidMount() {    
        const data = JSON.parse(sessionStorage.getItem('userData'));    
        let data1=data;    
        console.log(data1.data.Name);    
        
         console.log(data1.Name);    
         this.setState({name: data1.data.Name})    
      }    
        render() {    
                return (    
                        <div className="container">       
                         <div className="row">      
                                  <div className="col-sm-12 btn btn-info">      
                                 Welcome to Dashboard    
                         </div>      
                         </div>    
                         <div className="row">    
                         <div className="col-sm-3"> Welcome  :{this.state.name} </div>    
                         <div className="col-sm-9"></div>    
                         {/* <div className="col-sm-4"></div> */}    
                         </div>    
                        </div>    
                )    
        }    
}    
    
export default Dashboard     

Create a table in the Database

Open SQL Server Management Studio, create a database named "Demotest," and in this database, create a table. Give that table a name like "sociallogin".

CREATE TABLE [dbo].[Socaillogin](    
    [Id] [int] IDENTITY(1,1) NOT NULL,    
    [Name] [varchar](50) NULL,    
    [Email] [varchar](50) NULL,    
    [ProviderName] [varchar](50) NULL,    
    [Image] [varchar](650) NULL,    
    [Token] [nvarchar](650) NULL,    
 CONSTRAINT [PK_Socaillogin] 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 Web API Project

Open Visual Studio and create a new project.

Change the name as LoginApplication

Select Web API as its template.

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 the 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 the "Finish" button.

Our data model is created successfully now.

Now, Right-click on the model folder and add two classes -Userdetails and Response. Now, paste the following code in these classes.

Userdetails class

public class Userdetails    
    {    
        public int Id { get; set; }    
        public string Name { get; set; }    
        public string Email { get; set; }    
        public string ProviderName { get; set; }    
        public string Image { get; set; }    
        public string Token { get; set; }    
    }    

Response Class

public class Response        
   {        
       public string Status { set; get; }        
       public string Message { set; get; }        
   }       

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

using LoginWithSocialMedio.Models;    

Create a method in this controller to save data. Add the following code in this controller.

using System;    
using System.Collections.Generic;    
using System.Linq;    
using System.Net;    
using System.Net.Http;    
using System.Web.Http;    
using LoginWithSocialMedio.Models;    
    
namespace LoginWithSocialMedio.Controllers    
{    
    [RoutePrefix("Api/Login")]    
    public class LoginController : ApiController    
    {    
        [Route("SocialmediaData")]    
        [HttpPost]    
        public object SocialmediaData(Userdetails user)    
        {    
            try    
            {    
                DemoTestEntities DB = new DemoTestEntities();    
                Socaillogin Social = new Socaillogin();    
                if (Social.Id == 0)    
                {    
                    Social.Name = user.Name;    
                    Social.Email = user.Email;    
                    Social.ProviderName = user.ProviderName;    
                    Social.Image = user.Image;    
                    Social.Token = user.Token;    
                    var res = DB.Socaillogins.Add(Social);    
                    DB.SaveChanges();    
                    return res;    
                }    
            }    
            catch (Exception)    
            {    
                throw;    
            }    
            return new Response    
            { Status = "Error", Message = "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.