Selection Property (Renderers)

Gets or sets the zero-based index of the currently selected Renderer item.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public Property Selection As Integer

'Usage
 
Dim instance As Renderers
Dim value As Integer
 
instance.Selection = value
 
value = instance.Selection

public int Selection {get; set;}

public:
property int Selection {
   int get();
   void set (    int value);
}

Property Value

The zero-based index of the selected item; otherwise -1 if no item selected.

Remarks

Gets or sets the zero-based index of the currently selected Renderer item. Assignment could raise an error exception. For more information, refer to the Error Codes.

Example

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public _capturectrl As CaptureCtrl
Public Sub AudioRenderersExample()
   ' output file
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_AudioRenderersExample.avi")

   ' reference the capture control
   _capturectrl = _form.CaptureCtrl

   Try
      ' set the source video device, select using your device name here
      If _capturectrl.VideoDevices("USB") Is Nothing Then
         Throw New Exception("No USB video device available")
      End If

      _capturectrl.VideoDevices("USB").Selected = True

      ' select a video compressor
      _capturectrl.VideoCompressors.Mpeg4.Selected = True

      ' set the target file
      _capturectrl.TargetFile = outFile

      ' reference the audio renderers collection
      Dim ar As AudioRenderers = _capturectrl.AudioRenderers

      ' get the current selection
      Dim currSelection As Integer = ar.Selection

      ' loop through the capture control's registered audio renderers
      For Each r As Renderer In ar
         ' select by renderer friendly name
         If r.FriendlyName = "Default DirectSound Device" AndAlso Not r Is ar(currSelection) Then
            ' select it
            r.Selected = True
            Exit For
         End If

         ' select by renderer name (device name)
               If r.Name = "@device:cm:{E0F158E1-CB04-11D0-BD4E-00A0C911CE86}\Default DirectSound Device" _
                 AndAlso Not r Is ar(currSelection) Then
                   ' select it
                   r.Selected = True
                   Exit For
               End If
      Next r

      ' check the new selection
      Dim newSelection As Integer = ar.Selection

      ' set the result to what we expect
      _result = (currSelection <> newSelection)

      ' set the started event handler
      AddHandler _capturectrl.Started, AddressOf CaptureCtrl_Started

      ' run the capture
      _capturectrl.StartCapture(CaptureMode.Video)
   Catch e1 As Exception
      _result = False
   End Try

   ' we'll loop on the state and pump messages for this example.
   ' but you should not need to if running from a Windows Forms application.
   Do While _capturectrl.State = CaptureState.Running
      Application.DoEvents()
   Loop
End Sub

Public Sub CaptureCtrl_Started(ByVal sender As Object, ByVal e As EventArgs)
   ' stop the capture
   _capturectrl.StopCapture()
End Sub

Public NotInheritable Class LEAD_VARS
Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media"
End Class

using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public CaptureCtrl _capturectrl;
public void AudioRenderersExample()
{
   // output file
   string outFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_AudioRenderersExample.avi");

   // reference the capture control
   _capturectrl = _form.CaptureCtrl;

   try
   {
      // set the source video device, select using your device name here
      if (_capturectrl.VideoDevices["USB"] == null)
         throw new Exception("No USB video device available");

      _capturectrl.VideoDevices["USB"].Selected = true;

      // select a video compressor
      _capturectrl.VideoCompressors.Mpeg4.Selected = true;

      // set the target file
      _capturectrl.TargetFile = outFile;

      // reference the audio renderers collection
      AudioRenderers ar = _capturectrl.AudioRenderers;

      // get the current selection
      int currSelection = ar.Selection;

      // loop through the capture control's registered audio renderers
      foreach (Renderer r in ar)
      {
         // select by renderer friendly name
         if (r.FriendlyName == "Default DirectSound Device" && r != ar[currSelection])
         {
            // select it
            r.Selected = true;
            break;
         }

         // select by renderer name (device name)
         if (r.Name == @"@device:cm:{E0F158E1-CB04-11D0-BD4E-00A0C911CE86}\Default DirectSound Device" && r != ar[currSelection])
         {
            // select it
            r.Selected = true;
            break;
         }
      }

      // check the new selection
      int newSelection = ar.Selection;

      // set the result to what we expect
      _result = (currSelection != newSelection);

      // set the started event handler
      _capturectrl.Started += new EventHandler(CaptureCtrl_Started);

      // run the capture
      _capturectrl.StartCapture(CaptureMode.Video);
   }
   catch (Exception)
   {
      _result = false;
   }

   // we'll loop on the state and pump messages for this example.
   // but you should not need to if running from a Windows Forms application.
   while (_capturectrl.State == CaptureState.Running)
      Application.DoEvents();
}

public void CaptureCtrl_Started(object sender, EventArgs e)
{
   // stop the capture
   _capturectrl.StopCapture();
}

static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media";
}

Requirements

Target Platforms

Reference

Renderers Class
Renderers Members