MainWindow.axaml.vb

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Imports System.IO
Imports Avalonia.Controls
Imports Avalonia.Markup.Xaml
Imports DotNetBrowser.AvaloniaUi
Imports DotNetBrowser.Browser
Imports DotNetBrowser.Engine

'''<summary>
'''    The sample demonstrates how to enable transparent background
'''    on the web page.
'''</summary>
Partial Public Class MainWindow
    Inherits Window

    Private ReadOnly Url As String = Path.Combine(Directory.GetCurrentDirectory(), "transparent.html")
    Private ReadOnly browser As IBrowser
    Private ReadOnly engine As IEngine

    Private Window As Window
    Private BrowserView As BrowserView

    Public Sub New()
        ' Create and initialize the IEngine instance.
        Dim engineOptions As EngineOptions = New EngineOptions.Builder With {
            .RenderingMode = RenderingMode.OffScreen
        }.Build()

        engine = EngineFactory.Create(engineOptions)

        ' Create the IBrowser instance.
        browser = engine.CreateBrowser()
        browser.Settings.TransparentBackgroundEnabled = true

        InitializeComponent()

        ' Initialize the Avalonia UI BrowserView control.
        BrowserView.InitializeFrom(browser)
        browser.Navigation.LoadUrl(Url)
    End Sub

    Private Sub Window_Closed(ByVal sender As Object, ByVal e As EventArgs)
        browser?.Dispose()
        engine?.Dispose()
    End Sub

    ' Auto-wiring does not work for VB, so do it manually
    ' Wires up the controls and optionally loads XAML markup and attaches dev tools
    ' (if Avalonia.Diagnostics package is referenced)
    Private Sub InitializeComponent(Optional loadXaml As Boolean = True)

        If loadXaml Then
            AvaloniaXamlLoader.Load(Me)
        End If

        ' An example of manually getting the named BrowserView component
        BrowserView = FindNameScope().Find("BrowserView")

        ' An example of manually getting the named Window
        Window = FindNameScope().Find("Window")

    End Sub

End Class