Azure | Azure Functions By Example

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Microsoft Azure Functions Example

In this example, we'll create a simple Azure Functions application in C#. Azure Functions is a serverless compute service that allows you to run event-triggered code without managing infrastructure. We will create a function that responds to an HTTP request.

Prerequisites

Before you begin, make sure you have the following prerequisites:

• Microsoft Azure account.
• Azure Functions Extension installed in Visual Studio or Visual Studio Code.
• .NET Core SDK installed.

Create an Azure Function

1. Create a New Function Project:

In your development environment, create a new Azure Functions project using the Azure Functions extension. You can choose the template that suits your needs.

1. Add a New Function:

Add a new function to your project. Select "HTTP trigger" as the template. This will create a function that responds to HTTP requests.

1. Implement the Function:

In the generated function code, you can implement your logic. Here's a simple example that responds with "Hello, Azure Functions!" when the function is triggered:

   using System;
   using Microsoft.AspNetCore.Http;
   using Microsoft.AspNetCore.Mvc;
   using Microsoft.Azure.WebJobs;
   using Microsoft.Azure.WebJobs.Extensions.Http;
   using Microsoft.Extensions.Logging;

   public static class HelloWorldFunction
   {
       [FunctionName("HelloWorld")]
       public static async Task<IActionResult> Run(
           [HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,
           ILogger log)
       {
           log.LogInformation("C# HTTP trigger function processed a request.");

           return new OkObjectResult("Hello, Azure Functions!");
       }
   }

1. Run the Function Locally:

You can test your function locally by running it in your development environment. Use the Azure Functions CLI to start the local runtime.

   func start

1. Deploy to Azure:

Once your function is working as expected, you can deploy it to Azure. Use the Azure Functions extension to publish your project to Azure.

1. Test the Function in Azure:

After deployment, you can test the function by navigating to its URL. You'll receive "Hello, Azure Functions!" as a response.

What Next?

This example demonstrates a basic Azure Functions application in C#. Azure Functions are a powerful way to build serverless applications that respond to various triggers. You can extend this example by adding more functions, integrating with other Azure services, and handling more complex scenarios.
Azure Functions are flexible and can be used for a wide range of use cases, including data processing, automation, and API endpoints.