Count Property (Devices)

Visual Basic
C#
C++/CLI

'Declaration
 
Public ReadOnly Property Count As Integer

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

public int Count {get;}

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

Imports Leadtools
Imports Leadtools.MediaFoundation
Imports LeadtoolsMediaFoundationExamples.Fixtures

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

using Leadtools;
using Leadtools.MediaFoundation;
using LeadtoolsMediaFoundationExamples.Fixtures;

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;
   }
}

Target Platforms

Reference

Devices Class
Devices Members