Count Property (CaptureSubTypes)

Visual Basic
C#
C++/CLI

'Declaration
 
Public ReadOnly Property Count As Integer

'Usage
 
Dim instance As CaptureSubTypes
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 _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public Sub CountResetExample()
   Try
      ' reference the form capture control
      Dim capturectrl As CaptureCtrl = _form.CaptureCtrl

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

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

      ' reference the video capture subtype collection
      Dim stypes As CaptureSubTypes = capturectrl.VideoCaptureSubTypes

      ' get count of subtypes
      Dim cnt As Integer = stypes.Count

      ' get the current capture subtype before enumeration loop
      Dim before As CaptureSubType = TryCast(stypes.Current, CaptureSubType)

      ' enumerate them and break on master volume
      For Each cs As CaptureSubType In stypes
         If cs.Name = Leadtools.MediaFoundation.Constants.MEDIASUBTYPE_RGB24 Then
            Exit For
         End If
      Next cs

      ' get the current capture subtype now
      Dim now As CaptureSubType = TryCast(stypes.Current, CaptureSubType)

      ' if they are different reset the collection
      If Not now Is before Then
         stypes.Reset()
      End If

      ' set the result to what we expect
      _result = (stypes.Current Is before)
   Catch e1 As Exception
      _result = False
   End Try
End Sub

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

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void CountResetExample()
{
   try
   {
      // reference the form capture control
      CaptureCtrl capturectrl = _form.CaptureCtrl;

      // set a video device first, you should use your video device name here
      if (capturectrl.VideoDevices["Logitech"] == null)
         throw new Exception("No Logitech video device available");

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

      // reference the video capture subtype collection
      CaptureSubTypes stypes = capturectrl.VideoCaptureSubTypes;

      // get count of subtypes
      int cnt = stypes.Count;

      // get the current capture subtype before enumeration loop
      CaptureSubType before = stypes.Current as CaptureSubType;

      // enumerate them and break on master volume
      foreach (CaptureSubType cs in stypes)
      {
         if (cs.Name == Constants.MEDIASUBTYPE_RGB24)
            break;
      }

      // get the current capture subtype now
      CaptureSubType now = stypes.Current as CaptureSubType;

      // if they are different reset the collection
      if (now != before)
         stypes.Reset();

      // set the result to what we expect
      _result = (stypes.Current == before);
   }
   catch (Exception)
   {
      _result = false;
   }
}

Target Platforms

Reference

CaptureSubTypes Class
CaptureSubTypes Members