Weather--

An app showcasing GraphQL with ASP.Net Core 3 and Xamarin Forms

This is an educational repository showcasing a GraphQL API consumed by a Xamarin Forms app. This repository can be used as a template for:

• a modern Xamarin Forms 4.3 app with clean and testable architecture consuming a GraphQL endpoint
• an Asp.Net Core 3 GraphQL server in front of the OpenWeather APIs

The API can be explored on https://graphql-weather.azurewebsites.net/ui/playground.

The code uses some of the new features of C# 8, such as nullable reference types.

I've given a presentation on modern Xamarin Forms and this repo in particular at a local .Net User Group meeting, and you can view the slides below here:

https://speakerdeck.com/sankra/xamarin-forms-from-duplo-to-lego

Run locally

The apps needs a tiny bit configuration before running locally:

The server

The server needs an OpenWeather API key, which is available for free on openweather.org. This key must be set as an environment variable or present in appsettings.json for the server to run:

OpenWeatherConfiguration__ApiKey="[APIKEY]"

To run the server after configuration is in place, navigate to the /src/API/GraphQLDotNet.API-folder, and run:

dotnet run

The apps

The apps need the address of the server and optionally an AppCenter secret, for iOS and/or Android, to use crash reporting and analytics in AppCenter. These must be specified in a secrets.json file present at the root of the src/Mobile/GraphQLDotNet.Mobile project. This file is ignored by Git.

If the server is running locally, you can use:

{
  "ApiBaseAddress": "localhost",
  "AppCenteriOsSecret": "",
  "AppCenterAndroidSecret": ""
}

Then either GraphQLDotNet.Mobile.Android or GraphQLDotNet.Mobile.iOS can be run from Visual Studio.