Count Property (Devices)

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public int Count {get;}

'Declaration
 
Public ReadOnly Property Count As Integer

'Usage
 
Dim instance As Devices
Dim value As Integer
 
value = instance.Count

public int Count {get;}

 get_Count();

public:
property int Count {
   int get();
}

Property Value

The number of items contained in the collection.

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

Copy Code

Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public _result As Boolean = False
Public Sub CountResetExample()
   Try
      ' reference the form capture control and it's video inputs
      Dim capturectrl As CaptureCtrl = _form.CaptureCtrl
      Dim devices As Devices = capturectrl.VideoDevices

      ' get count before setting device
      Dim n As Integer = devices.Count

      ' set a video device first, you should use your video device name here
      If capturectrl.VideoDevices("Analog") Is Nothing Then
         Throw New Exception("No Analog video tuner device available")
      End If

      capturectrl.VideoDevices("Analog").Selected = True

      ' get count after setting device
      Dim m As Integer = devices.Count

      ' reset the collection
      devices.Reset()

      ' set out result to what we expect 
      _result = (m = n)
   Catch e1 As Exception
      _result = False
   End Try
End Sub

public CaptureCtrlForm _form = new CaptureCtrlForm();
public bool _result = false;
public void CountResetExample()
{
   try
   {
      // reference the form capture control and its video inputs
      CaptureCtrl capturectrl = _form.CaptureCtrl;
      Devices devices = capturectrl.VideoDevices;

      // get count before setting device
      int n = devices.Count;

      // set a video device first.  use your video device's name here
      if (capturectrl.VideoDevices["Analog"] == null)
         throw new Exception("No Analog video tuner device available");

      capturectrl.VideoDevices["Analog"].Selected = true;

      // get count after setting device
      int m = devices.Count;

      // reset the collection
      devices.Reset();

      // set out result to what we expect 
      _result = (m == n);
   }
   catch (Exception)
   {
      _result = false;
   }
}

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

Devices Class
Devices Members