markdown WPFでXamarin.Formsをホストする

Posted 2021-05-05

---
uti: com.xamarin.workbook
id: 86e9f8bb-9227-4deb-92b7-21b05b144e40
title: wpf_xamarin
platforms:
- WPF
packages:
- id: Xamarin.Forms.Platform.WPF
  version: 3.4.0.1009999
---

Xamarin.Forms.Platform.WPFをNugetから追加

```csharp
#r "Xamarin.Forms.Core"
#r "Xamarin.Forms.Xaml"
#r "Xamarin.Forms.Platform"
#r "Xamarin.Forms.Platform.WPF"
```

Xamarin.Formsをホスト出来るWindowを作成、ContentPageを指定したApplicationインスタンスを起動

```csharp
using Xamarin.Forms;
using Xamarin.Forms.Platform.WPF;

var page = new ContentPage();
var window = new FormsApplicationPage { Title = "Xamarin.Forms on WPF", Width = 320, Height = 480 };
Xamarin.Forms.Forms.Init();
window.LoadApplication(new Application { MainPage = page });
window.Show();
```

ContentPage.Content に表示したいコンポーネントを設定

```csharp
var tapGesture = new TapGestureRecognizer();
tapGesture.Tapped += (s, e) => 
{
    if (s is Label label)
    {
        Device.OpenUri(new Uri(label.Text));
    }
};
var layout = page.Content = new StackLayout { Margin = new Thickness(20), Spacing = 4, Children = 
{
    new Label { Text = "Hello from Xamarin.Forms" },
    new Label 
    {
        Text = "http://www.google.co.jp/", 
        TextDecorations = TextDecorations.Underline,
        TextColor = Color.DarkBlue,
        GestureRecognizers = { tapGesture }
     }
}};
```