Azure Event Grid is a cloud-based event routing service provided by Microsoft Azure that simplifies the development of event-driven applications. In this guide, we will explore the fundamentals of Azure Event Grid, event routing, and provide sample code to help you get started with building event-driven applications using Azure Event Grid.

Key Concepts

Before diving into Azure Event Grid, it's important to understand some key concepts:

  • Events: Events are notifications or signals about something that has happened. They can be generated by Azure services or custom sources.
  • Event Publishers: Event publishers are sources that produce events. Examples include Azure Blob Storage and Azure Functions.
  • Event Subscribers: Event subscribers are destinations that react to events. Subscribers can be Azure Functions, Logic Apps, or custom endpoints.
  • Event Topics: Event topics act as message brokers that route events from publishers to subscribers.

Getting Started with Azure Event Grid

To get started with Azure Event Grid, follow these general steps:

  1. Create an Azure Event Grid topic to act as an event router.
  2. Configure event publishers to send events to the topic.
  3. Create event subscriptions that specify how events should be routed to subscribers.
  4. Build event handlers in your subscribers to react to incoming events.

Sample Code: Azure Event Grid Event Subscription

Here's an example of an Azure Event Grid subscription in Azure Functions that responds to blob creation events from Azure Blob Storage:

using System;
using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;
public static class BlobCreatedFunction
public static void Run(
[EventGridTrigger] EventGridEvent eventGridEvent,
ILogger log)
log.LogInformation($"Received event with subject: {eventGridEvent.Subject}");
// Process the event data here

Benefits of Azure Event Grid

Azure Event Grid offers several benefits, including:

  • Real-time event routing and delivery.
  • Integration with a wide range of Azure services and custom sources.
  • Flexible and customizable event subscriptions.
  • Scalability to handle a high volume of events.


Azure Event Grid simplifies the development of event-driven applications by providing a scalable and real-time event routing service. By understanding the key concepts, getting started steps, and using sample code, you can leverage Azure Event Grid to build responsive and dynamic applications that react to events from various sources.