Refresh Method (TargetDevices)

Visual Basic
C#
C++/CLI

'Declaration
 
Public Sub Refresh()

'Usage
 
Dim instance As TargetDevices
 
instance.Refresh()

public void Refresh()

public:
void Refresh();

Rebuilds the device collection. This method will rebuild the collection of system-registered devices. It is usually called from applications that respond to system device change notifications. If the method fails, an error is raised. For more information, refer to the Error Codes.

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

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Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

Public _result As Boolean = False
Public _form As ConvertCtrlForm = New ConvertCtrlForm()
Public Sub TargetDevicesExample()
  Dim inputName, inputFriendlyName As String
  Dim selectedCamera As Integer

  ' reference the convert control
  Dim convertctrl As ConvertCtrl = _form.ConvertCtrl

  Try
     ' get the target devices object
     Dim devices As TargetDevices = convertctrl.TargetDevices

     ' select an input by name if possible
     If devices("Microsoft DV Camera") Is Nothing Then
       Throw New Exception("No MS DV Camera device available!")
     End If

     devices("Microsoft DV Camera").Selected = True

     ' get the full friendly name of the device 
     Dim friendlyName As String = devices("Microsoft DV Camera").FriendlyName

     ' get the selected index of the currently selected target device
     ' (the MS DV camera above)
     selectedCamera = devices.Selection

     ' now enumerate all the target devices,
     ' looking for an audio device and select it
     For Each td As TargetDevice In devices
       ' get the inputs properties
       inputName = td.Name
       inputFriendlyName = td.FriendlyName

       ' if we found a target audio device
       If inputFriendlyName.Contains("Audio") Then
         ' select it and break
         td.Selected = True
         Exit For
       End If
     Next td

     ' set the result to what we expect
     _result = (selectedCamera <> devices.Selection)

  Catch e1 As Exception
     _result = False
  End Try
End Sub

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

public bool _result = false;
public ConvertCtrlForm _form = new ConvertCtrlForm();
public void TargetDevicesExample()
{
   string inputName, inputFriendlyName;
   int selectedCamera;

   // reference the convert control
   ConvertCtrl convertctrl = _form.ConvertCtrl;

   try
   {
      // get the target devices object
      TargetDevices devices = convertctrl.TargetDevices;

      // select an input by name if possible
      if (devices["Microsoft DV Camera"] == null)
         throw new Exception("No MS DV Camera device available!");

      devices["Microsoft DV Camera"].Selected = true;

      // get the full friendly name of the device 
      string friendlyName = devices["Microsoft DV Camera"].FriendlyName;

      // get the selected index of the currently selected target device
      // (the MS DV camera above)
      selectedCamera = devices.Selection;

      // now enumerate all the target devices,
      // looking for an audio device and select it
      foreach (TargetDevice td in devices)
      {
         // get the inputs properties
         inputName = td.Name;
         inputFriendlyName = td.FriendlyName;

         // if we found a target audio device
         if (inputFriendlyName.Contains("Audio"))
         {
            // select it and break
            td.Selected = true;
            break;
         }
      }

      // set the result to what we expect
      _result = (selectedCamera != devices.Selection);

   }
   catch (Exception)
   {
      _result = false;
   }
}

Target Platforms

Reference

TargetDevices Class
TargetDevices Members