Step by Step Guide to Building a Calendly API Integration in C#

Jul 31, 2024 • 5 minute read

Introduction

Hey there, fellow developer! Ready to supercharge your scheduling game? Let's dive into the world of Calendly API integration using C#. With the Calendly v2 SDK package, we'll have you up and running in no time. Buckle up!

Prerequisites

Before we jump in, make sure you've got:

Visual Studio or your favorite C# IDE
.NET Core 3.1 or later
A Calendly account (duh!)
Your Calendly API key (grab it from your account settings)

Setting up the project

First things first, let's get our project ready:

Fire up Visual Studio and create a new C# Console Application.
Open up the Package Manager Console and run:

Install-Package Calendly.Api

Easy peasy, right?

Initializing the Calendly client

Now, let's get that Calendly client up and running:

using Calendly.Api;

var client = new CalendlyClient("YOUR_API_KEY");

Replace YOUR_API_KEY with your actual API key, and you're good to go!

Basic API operations

Let's start with some basic operations to get our feet wet:

Fetching user information

var currentUser = await client.Users.GetCurrentUser();
Console.WriteLine($"Hello, {currentUser.Name}!");

Retrieving event types

var eventTypes = await client.EventTypes.List();
foreach (var eventType in eventTypes.Collection)
{
    Console.WriteLine($"Event Type: {eventType.Name}");
}

Getting scheduled events

var events = await client.Events.List();
foreach (var scheduledEvent in events.Collection)
{
    Console.WriteLine($"Event: {scheduledEvent.Name} at {scheduledEvent.StartTime}");
}

Advanced operations

Ready to level up? Let's tackle some advanced stuff:

Creating webhook subscriptions

var subscription = await client.Webhooks.Create(new CreateWebhookRequest
{
    Url = "https://your-webhook-url.com",
    Events = new[] { "invitee.created", "invitee.canceled" }
});

Handling webhook events

// In your webhook endpoint
public async Task<IActionResult> HandleWebhook([FromBody] WebhookEvent webhookEvent)
{
    switch (webhookEvent.Event)
    {
        case "invitee.created":
            // Handle new invitee
            break;
        case "invitee.canceled":
            // Handle cancellation
            break;
    }
    return Ok();
}

Error handling and best practices

Don't forget to wrap your API calls in try-catch blocks:

try
{
    var user = await client.Users.GetCurrentUser();
}
catch (CalendlyApiException ex)
{
    Console.WriteLine($"Oops! {ex.Message}");
}

And remember, Calendly has rate limits. Be a good API citizen and don't hammer those endpoints!

Testing the integration

Testing is crucial, folks! Here's a quick example using xUnit:

public class CalendlyIntegrationTests
{
    [Fact]
    public async Task GetCurrentUser_ReturnsValidUser()
    {
        var client = new CalendlyClient("YOUR_TEST_API_KEY");
        var user = await client.Users.GetCurrentUser();
        Assert.NotNull(user);
        Assert.NotEmpty(user.Name);
    }
}

Conclusion

And there you have it! You're now armed with the knowledge to build a solid Calendly integration in C#. Remember, this is just the tip of the iceberg. There's so much more you can do with the Calendly API, so don't be afraid to explore and experiment.

Additional resources

Now go forth and schedule like a boss! Happy coding!