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Contains Method

Summary

Determines whether a collection contains a specified Device item.

Syntax

C++

public bool Contains( 
   Device item 
)

Public Function Contains( _ 
   ByVal item As Device _ 
) As Boolean

public: 
bool Contains(  
   Device^ item 
)

Parameters

item
The object to locate in the collection.

Return Value

true if the item was found in the collection; false, otherwise.

Example

using Leadtools; 
using Leadtools.Multimedia; 
using LeadtoolsMultimediaExamples.Fixtures; 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
public void IndexContainsExample() 
{ 
   // reference the capture control 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   try 
   { 
      // select a video device, use your device name here instead of Analog 
      if (capturectrl.VideoDevices["Analog"] == null) 
         throw new Exception("No Analog video tuner device available"); 
 
      capturectrl.VideoDevices["Analog"].Selected = true; 
 
      // reference the video devices object 
      Devices devices = capturectrl.VideoDevices; 
 
      // check the index of a USB video device 
      int i = devices.IndexOf("USB"); 
 
      Device dev = null; 
      if (i > -1) 
         // access the input via the collection indexer 
         dev = devices[i]; 
 
      // check whether the collection contains this input  
      // (it should we just got it with IndexOf above) 
      if (devices.Contains(dev)) 
      { 
         // set the result to what we expect 
         _result = true; 
      } 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
}

Imports Leadtools 
Imports Leadtools.Multimedia 
Imports LeadtoolsMultimediaExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As CaptureCtrlForm = New CaptureCtrlForm() 
 
Public Sub IndexContainsExample() 
   ' reference the capture control 
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl 
 
   Try 
      ' select a video device, use your device name here instead of Analog 
      If capturectrl.VideoDevices("Analog") Is Nothing Then 
         Throw New Exception("No Analog video tuner device available") 
      End If 
 
      capturectrl.VideoDevices("Analog").Selected = True 
 
      ' reference the video devices object 
      Dim devices As Devices = capturectrl.VideoDevices 
 
      ' check the index of a USB video device 
      Dim i As Integer = devices.IndexOf("USB") 
 
      Dim dev As Device = Nothing 
      If i > -1 Then 
         ' access the input via the collection indexer 
         dev = devices(i) 
      End If 
 
      ' check if the collection contains this input  
      ' (it should we just got it with IndexOf above) 
      If devices.Contains(dev) Then 
         ' set the result to what we expect 
         _result = True 
      End If 
   Catch e1 As Exception 
      _result = False 
   End Try 
End Sub

Requirements

Target Platforms

Reference

Devices Class

Devices Members

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Help Version 20.0.2020.4.2

Leadtools.Multimedia Assembly

Introduction

Getting Started

Namespaces

Leadtools.Multimedia Namespace

Leadtools.Multimedia.Common Namespace

Assemblies