.NET Implementing Real-Time Online Banking Account Updates with SignalR

Enhance Online Banking Security and Performance with SignalR

Table of Contents

• Introduction
• Why Use SignalR for Banking Applications?
• Real-Time Use Cases in Banking
• Setting Up SignalR in ASP.NET Core
• Implementing Server-Side SignalR
• Implementing Client-Side with JavaScript
• Security Considerations
• Conclusion

Introduction

Real-time banking applications need to instantly update account balances, transaction history, and fraud alerts. SignalR in ASP.NET Core is the perfect solution for delivering live updates in online banking systems.

Why Use SignalR for Banking Applications?

SignalR enables real-time communication between the banking server and clients:

• ✅ Instant balance updates when a transaction is made
• ✅ Live fraud alerts to detect suspicious activity
• ✅ Push notifications for banking transactions
• ✅ High-performance messaging for thousands of connected users

Real-Time Use Cases in Banking

Banking applications benefit from real-time updates in several ways:

• Live Account Balance Updates: Show users their updated balance instantly.
• Fraud Detection Alerts: Notify users of suspicious activities immediately.
• Real-Time Transaction History: Display newly completed transactions dynamically.

Setting Up SignalR in ASP.NET Core

Follow these steps to add SignalR to your .NET banking application.

1. Install SignalR NuGet package:

   dotnet add package Microsoft.AspNetCore.SignalR

2. Add SignalR to `Program.cs`:

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddSignalR();
var app = builder.Build();
app.UseEndpoints(endpoints => { endpoints.MapHub<BankingHub>("/bankingHub"); });
app.Run();
    

Implementing Server-Side SignalR

Create a `BankingHub.cs` to handle real-time banking updates.

using Microsoft.AspNetCore.SignalR;
public class BankingHub : Hub
{
    public async Task UpdateBalance(string userId, decimal newBalance)
    {
        await Clients.User(userId).SendAsync("ReceiveBalanceUpdate", newBalance);
    }
}
    

Implementing Client-Side with JavaScript

Connect to SignalR in your banking web application.

let connection = new signalR.HubConnectionBuilder()
    .withUrl("/bankingHub")
    .build();

connection.on("ReceiveBalanceUpdate", function (balance) {
    document.getElementById("accountBalance").innerText = "Balance: $" + balance;
});

connection.start().catch(err => console.error(err));
    

Security Considerations

Ensure banking security with:

• JWT-based authentication for secure connections.
• Rate limiting to prevent SignalR abuse.
• End-to-end encryption for sensitive financial data.

Conclusion

Using SignalR in .NET banking applications provides real-time transaction updates, fraud detection alerts, and live account balances. Implementing it with ASP.NET Core ensures high performance, security, and scalability.

© 2025 Sandeep Mhaske | Visit Blog