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Count Property

Summary

Gets the number of items contained in the collection.

Syntax

C#
VB
C++
public int Count { get; } 
Public ReadOnly Property Count As Integer 
public: 
property int Count { 
   int get(); 
} 

Property Value

The number of items contained in the collection; or 0 if the collection is empty.

Remarks

Gets the number of items contained in the collection.

Example

C#
VB
using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
public bool _result = false; 
 
public void CountExample() 
{ 
   try 
   { 
      // reference the form capture control and it's video formats 
      CaptureCtrl capturectrl = _form.CaptureCtrl; 
      VideoFormats formats = capturectrl.VideoCaptureFormats; 
 
      // get count before setting device 
      int n = formats.Count; 
 
      // set a video device first, you should use your video device name here 
      if (capturectrl.VideoDevices["USB"] == null) 
         throw new Exception("No USB video device available"); 
 
      capturectrl.VideoDevices["USB"].Selected = true; 
 
      // get count after setting device 
      int m = formats.Count; 
 
      // set out result to what we expect  
      _result = (m != n); 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _form As CaptureCtrlForm = New CaptureCtrlForm() 
Public _result As Boolean = False 
 
Public Sub CountExample() 
   Try 
      ' reference the form capture control and it's video formats 
      Dim capturectrl As CaptureCtrl = _form.CaptureCtrl 
      Dim formats As VideoFormats = capturectrl.VideoCaptureFormats 
 
      ' get count before setting device 
      Dim n As Integer = formats.Count 
 
      ' set a video device first, you should use your video device name here 
      If capturectrl.VideoDevices("USB") Is Nothing Then 
         Throw New Exception("No USB video device available") 
      End If 
 
      capturectrl.VideoDevices("USB").Selected = True 
 
      ' get count after setting device 
      Dim m As Integer = formats.Count 
 
      ' set out result to what we expect  
      _result = (m <> n) 
   Catch e1 As Exception 
      _result = False 
   End Try 
End Sub 

Requirements

Target Platforms

Help Version 19.0.2017.10.19
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Leadtools.MediaFoundation Assembly