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Count Property
See Also 
Leadtools.Multimedia Namespace > Devices Class : Count Property



Gets the number of items contained in the collection.

Syntax

Visual Basic (Declaration) 
Public ReadOnly Property Count As Integer
Visual Basic (Usage)Copy Code
Dim instance As Devices
Dim value As Integer
 
value = instance.Count
C# 
public int Count {get;}
C++/CLI 
public:
property int Count {
   int get();
}

Property Value

The number of items contained in the collection.

Example

Visual BasicCopy 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
C#Copy Code
public CaptureCtrlForm _form = new CaptureCtrlForm();
public bool _result = false;
public void CountResetExample()
{
   try
   {
      // reference the form capture control and it's video inputs
      CaptureCtrl capturectrl = _form.CaptureCtrl;
      Devices devices = capturectrl.VideoDevices;

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

      // set a video device first, you should use your video device 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;
   }
}

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

See Also