YouTube Videos in eigener Anwendung

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Imports System.Text
Imports System.ComponentModel
Imports System.Runtime.InteropServices

''' <summary>
''' FlashPlayer UserControl
''' </summary>
''' <remarks>
''' Dieses UserControl hosted über LateBinding einen
''' versionsunabhängigen FlashPlayer.
''' 
''' November 2009 - VB-Power.net
''' http://www.vb-power.net
''' </remarks>
Public Class FlashPlayer
   Inherits UserControl

   Private m_FlashHost As FlashHost
   Private m_AutoPlay As Boolean = True
   Private m_ColorFrom As Color = Color.Gray
   Private m_ColorTo As Color = Color.Gray
   Private m_ShowBorder As Boolean = False
   Private m_IsPlayerInit As Boolean = False

   ''' <summary>
   ''' Controller-Host für den FlashPlayer zur Darstellung
   ''' in einem UserControl.
   ''' </summary>
   Private Class FlashHost
      Inherits AxHost

      Public Sub New(ByVal sCLSID As String)
         MyBase.New(sCLSID)
      End Sub

      Public ReadOnly Property Player() As Object
         Get
            Return Me.GetOcx
         End Get
      End Property
   End Class

   ''' <summary>
   ''' Initialisiert das UserControl
   ''' </summary>
   Public Sub New()
      Try
         ' Versionsunabhängiges LateBinding des FlashPlayers
         Dim tFlashPlayer As Type = Type.GetTypeFromProgID("ShockwaveFlash.ShockwaveFlash")
         If tFlashPlayer IsNot Nothing Then
            m_FlashHost = New FlashHost(tFlashPlayer.GUID.ToString)
            DirectCast(m_FlashHost, ISupportInitialize).BeginInit()
            SuspendLayout()
            m_FlashHost.Visible = True
            m_FlashHost.Dock = DockStyle.Fill
            Controls.Add(m_FlashHost)
            DirectCast(m_FlashHost, ISupportInitialize).EndInit()
            ResumeLayout(False)
            PerformLayout()
            m_IsPlayerInit = True
         Else
            MessageBox.Show("Der FlashPlayer konnte nicht initialisiert werden.", _
               "Überprüfung FlashPlayer", MessageBoxButtons.OK, MessageBoxIcon.Error)
         End If
      Catch ex As Exception
         MessageBox.Show(ex.Message, "Initialisierung FlashPlayer", _
            MessageBoxButtons.OK, MessageBoxIcon.Error)
      End Try
   End Sub

   ''' <summary>
   ''' Legt fest, ob das Video sofort abgespielt werden soll.
   ''' </summary>
   <DefaultValue(GetType(System.Boolean), "True")> _
   Public Property AutoPlay() As Boolean
      Get
         Return m_AutoPlay
      End Get
      Set(ByVal value As Boolean)
         m_AutoPlay = value
      End Set
   End Property

   ''' <summary>
   ''' Legt die erste Verlaufsfarbe für Border und Navigator fest.
   ''' </summary>
   <DefaultValue(GetType(System.Drawing.Color), "Gray")> _
   Public Property ColorFrom() As Color
      Get
         Return m_ColorFrom
      End Get
      Set(ByVal value As Color)
         m_ColorFrom = value
      End Set
   End Property

   ''' <summary>
   ''' Legt die zweite Verlaufsfarbe für Border und Navigator fest.
   ''' </summary>
   <DefaultValue(GetType(System.Drawing.Color), "Gray")> _
   Public Property ColorTo() As Color
      Get
         Return m_ColorTo
      End Get
      Set(ByVal value As Color)
         m_ColorTo = value
      End Set
   End Property

   ''' <summary>
   ''' Zeigt an, ob ein FlashPlayer initialisiert werden konnte.
   ''' </summary>
   <Browsable(False)> _
   Public ReadOnly Property IsPlayerInit() As Boolean
      Get
         Return m_IsPlayerInit
      End Get
   End Property

   ''' <summary>
   ''' Legt fest, ob der Player einen Rahmen angezeigen soll.
   ''' </summary>
   <DefaultValue(GetType(System.Boolean), "False")> _
   Public Property ShowBorder() As Boolean
      Get
         Return m_ShowBorder
      End Get
      Set(ByVal value As Boolean)
         m_ShowBorder = value
      End Set
   End Property

   ''' <summary>
   ''' Spielt das angegebene Video ab.
   ''' </summary>
   ''' <param name="URL">Die URL des Videos.</param>
   Public Sub PlayMovie(ByVal URL As String)
      If Not String.IsNullOrEmpty(URL) Then
         Dim sb As New StringBuilder
         sb.Append(URL)
         sb.AppendFormat("&autoplay={0}", IIf(m_AutoPlay, "1", "0"))
         sb.AppendFormat("&color1=0x{0}{1}{2}", String.Format("{0:X2}", m_ColorFrom.R), _
            String.Format("{0:X2}", m_ColorFrom.G), String.Format("{0:X2}", m_ColorFrom.B))
         sb.AppendFormat("&color2=0x{0}{1}{2}", String.Format("{0:X2}", m_ColorTo.R), _
            String.Format("{0:X2}", m_ColorTo.G), String.Format("{0:X2}", m_ColorTo.B))
         sb.AppendFormat("&border={0}", IIf(m_ShowBorder, "1", "0"))

         m_FlashHost.Player.Movie = sb.ToString
      End If
   End Sub
End Class