vbnet/console/JavaScriptBridge/Program.vb

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Imports System.Text
Imports DotNetBrowser.Browser
Imports DotNetBrowser.Engine
Imports DotNetBrowser.Geometry
Imports DotNetBrowser.Js
Imports DotNetBrowser.Logging

''' <summary>
'''     This example demonstrates how to inject a .NET object into JavaScript and
'''     invoke its public methods from the JavaScript side.
''' </summary>
Friend Class Program

    Public Shared Sub Main()
        LoggerProvider.Instance.Level = SourceLevels.Information
        LoggerProvider.Instance.FileLoggingEnabled = True
        LoggerProvider.Instance.OutputFile = "dnb.log"

        Using engine As IEngine = EngineFactory.Create()
            Using browser As IBrowser = engine.CreateBrowser()

                browser.Size = New Size(700, 500)
                Dim htmlBytes() As Byte = Encoding.UTF8.GetBytes("<html>
                                 <body>
                                    <script type='text/javascript'>
                                        var ShowData = function (a) 
                                        {
                                             document.title = a.FullName 
                                             + ' ' + a.Age + '. ' + a.Walk(a.Children[1])
                                             + ' ' + a.Children[1].FullName 
                                             + ' ' + a.Children[1].Age;
                                        };
                                    </script>
                                 </body>
                               </html>")
                browser.Navigation.LoadUrl("data:text/html;base64," + Convert.ToBase64String(htmlBytes)) _
                .Wait()
                Dim person = New Person("Jack", 30, True)
                person.Children = New Dictionary(Of Integer, Person)()
                person.Children.Add(1, New Person("Oliver", 10, True))
                Dim value As IJsObject = browser.MainFrame.ExecuteJavaScript (Of IJsObject)("window").Result
                value.Invoke("ShowData", person)

                Console.WriteLine($"{vbTab}Browser title: {browser.Title}")
            End Using
        End Using

        Console.WriteLine("Press any key to terminate...")
        Console.ReadKey()
    End Sub

    Private Class Person

        Public ReadOnly Property Age As Double

        Public Property Children As IDictionary(Of Integer, Person)
        Public ReadOnly Property FullName As String

        Public ReadOnly Property Gender As Boolean

        Public Sub New(fullName As String, age As Integer, gender As Boolean)
            Me.Gender = gender
            Me.FullName = fullName
            Me.Age = age
        End Sub

        Public Function Walk(withPerson As Person) As String
            Return String.Format("{0} is walking with {1}!", If(Gender, "He", "She"), withPerson.FullName)
        End Function

    End Class
End Class