In This Topic ▼

Count Property

Summary

Gets the number of items contained in the collection.

Syntax

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.

Example

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  
      CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
      // reference the audio formats 
      AudioFormats formats = capturectrl.AudioCaptureFormats; 
 
      // get count before setting device 
      int n = formats.Count; 
 
      // set an audio device first, you should use your audio device name here 
      if (capturectrl.AudioDevices["USB"] == null) 
         throw new Exception("No USB audio device available"); 
 
      capturectrl.AudioDevices["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  
      Dim capturectrl As CaptureCtrl = _form.CaptureCtrl 
 
      ' reference the audio formats 
      Dim formats As AudioFormats = capturectrl.AudioCaptureFormats 
 
      ' get count before setting device 
      Dim n As Integer = formats.Count 
 
      ' set an audio device first, you should use your audio device name here 
      If capturectrl.AudioDevices("USB") Is Nothing Then 
         Throw New Exception("No USB audio device available") 
      End If 
 
      capturectrl.AudioDevices("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

Reference

AudioFormats Class

AudioFormats Members

Download our FREE evaluation

Help Version 20.0.2020.4.2

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies