Azure Functions with .NET
This section provides comprehensive documentation and guidance on developing, deploying, and managing serverless applications using .NET with Azure Functions.
Introduction to Azure Functions
Azure Functions is a serverless compute service that lets you run event-triggered code without explicitly provisioning or managing infrastructure. With .NET, you can build powerful, scalable functions that respond to a wide variety of events, from HTTP requests to queue messages and scheduled timers.
Key Benefits
- Event-driven: Execute code in response to events from Azure services or third-party sources.
- Scalable: Automatically scales based on demand, handling variable workloads.
- Cost-effective: Pay only for the compute time you consume.
- Developer Productivity: Focus on writing code, not managing servers.
Getting Started with .NET Azure Functions
Learn how to set up your development environment, create your first Azure Function, and run it locally.
Prerequisites
- .NET SDK (version 6.0 or later)
- Azure Functions Core Tools
- Visual Studio or VS Code with Azure Functions extension
Creating Your First Function
You can create a new Azure Functions project using the Azure Functions Core Tools CLI or through your IDE.
func init MyFunctionApp --dotnet
cd MyFunctionApp
func new --template "HTTP trigger" --name MyHttpTrigger
This command initializes a new .NET Azure Functions project and adds an HTTP-triggered function named MyHttpTrigger.
Common Triggers and Bindings
Azure Functions integrate seamlessly with various Azure services through triggers and bindings.
HTTP Trigger
Execute functions in response to HTTP requests.
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 MyHttpTrigger
{
[FunctionName("MyHttpTrigger")]
public static IActionResult Run(
[HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,
ILogger log)
{
log.LogInformation("C# HTTP trigger function processed a request.");
string name = req.Query["name"];
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
dynamic data = JsonConvert.DeserializeObject(requestBody);
name = name ?? data?.name;
return name != null
? (ActionResult)new OkObjectResult($"Hello, {name}!")
: new BadRequestObjectResult("Please pass a name on the query string or in the request body");
}
}
Timer Trigger
Run functions on a defined schedule.
using System;
using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;
public static class TimerTrigger
{
[FunctionName("TimerTrigger")]
public static void Run([TimerTrigger("0 */5 * * * *")]TimerInfo myTimer, ILogger log)
{
log.LogInformation($"C# Timer trigger function executed at: {DateTime.Now}");
}
}
Queue Trigger
Process messages from Azure Storage Queues.
For details on other triggers like Blob, Table, Cosmos DB, and Event Hubs, please refer to the official Azure Functions documentation.
Deployment and Management
Deploy your .NET Azure Functions to Azure and manage them effectively.
Deployment Options
- Azure CLI
- Azure DevOps
- GitHub Actions
- Visual Studio
Monitoring and Logging
Utilize Application Insights for robust monitoring, logging, and diagnostics of your serverless applications.