VincentH-Net

To generate an API client in Dart from an OpenApi.json file, and use it in Flutter, follow these steps:

Related: see this gist for how to generate an OpenApi.json file on build from an ASP.NET 8 Minimal API project

1. Create a new Flutter 3.10 (or later) Application project in Visual Studio Code: steps
2. Add the openapi_generator package to your project. Follow below steps instead of the instructions at pub.dev (at the time of writing they were out of date):
   • Include openapi_generator_annotationsin the dependencies section of your pubspec.yaml file :

     dependencies:
       openapi_generator_annotations: ^4.10.0

VincentH-Net

To generate OpenApi.json on build from an ASP.NET 8 Minimal API, follow these steps:

1. In Visual Studio for Windows 17.7.0 or later, create a new ASP.NET Core API project

2. Follow these instructions to install Swashbuckle.AspNetCore.Cli as a local dotnet tool in your project

3. Add these NuGet packages (or later versions) to the project:

  <ItemGroup>
  	<PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.0-preview.4.23260.4" />

VincentH-Net

# Start of NO underscore prefix on private fields
# Define the 'private_fields' symbol group:
dotnet_naming_symbols.private_fields.applicable_kinds = field
dotnet_naming_symbols.private_fields.applicable_accessibilities = private

# Define the 'notunderscored' naming style
dotnet_naming_style.notunderscored.capitalization = camel_case
dotnet_naming_style.notunderscored.required_prefix =

# Define the 'private_fields_notunderscored' naming rule

VincentH-Net

// C# vNext markup friendly
enum Row { Icon, Prompt, Header, Entry }

void Build() => Content = new Grid
{
    RowDefinitions = Rows.Define(
        (Icon  , Auto),
        (Prompt, Auto),
        (Header, 50  ),
        (Entry , Auto)

VincentH-Net

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Author</key>
	<string>Vincent Hoogendoorn</string>
	<key>CapeName</key>
	<string>WhiteIBeam</string>
	<key>CapeVersion</key>
	<real>1</real>

VincentH-Net

using FFImageLoading;
using FFImageLoading.Config;
using FFImageLoading.DataResolvers;
using FFImageLoading.Forms;
using FFImageLoading.Svg.Platform;
using FFImageLoading.Work;
using SkiaSharp;
using System;
using System.IO;
using System.Reflection;

VincentH-Net

using System.Threading.Tasks;
using PropertyChanged;

/// <summary>
/// See "Consuming the BFF API" in http://vincenth.net/blog/archive/2016/07/13/building-bff-backend-for-frontend-apis-for-xamarin-mobile-apps.aspx
/// </summary>
namespace MyApp.ApiModels
{
    [ImplementPropertyChanged] // This will make all properties in all partial Contact classes data-bindable
    public partial class Contact : ViewModelBase

VincentH-Net

using Xamarin.Forms;
// Additional guidance: see http://vincenth.net/blog/archive/2014/11/27/how-to-share-xamarin-forms-data-binding-code-across-xamarin-sketches-and-apps-without-using-strings.aspx 
// NOTE: Once support for creating classes is added to Xamarin Sketches,
//       there is no need for this Tuple + enum + BindName + regular expression workaround;
//       you can then simply create design data classes in the Sketch and bind to that using
//       the same syntax in both projects and sketches, e.g.:
//       SetBinding(..., (Person boundPerson) => boundPerson.Name)


// BindName helper function for use with binding to design data in Sketches.

VincentH-Net

/// <summary>
/// To automatically dismiss the onscreen keyboard in iOS when a user taps outside an editable view,
/// add a KeyboardDismissGestureRecognizer to your application's main window in FinishedLaunching, e.g.:
///     Window.AddGestureRecognizer(new KeyboardDismissGestureRecognizer());
/// </summary>
public class KeyboardDismissGestureRecognizer : UITapGestureRecognizer
{
	public KeyboardDismissGestureRecognizer() : base(() => { }) { CancelsTouchesInView = false; }

	public override void TouchesBegan(NSSet touches, UIEvent evt)

VincentH-Net

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/OrderResultView"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:fillViewport="true">
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">