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Contains Method

Summary

Determines whether a collection contains a specified VideoFormat item.

Syntax

C#
VB
C++
public bool Contains( 
   VideoFormat item 
) 
Public Function Contains( _ 
   ByVal item As Leadtools.Mediafoundation.VideoFormat _ 
) As Boolean 

Parameters

item
The object to locate in the collection.

Return Value

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

Remarks

Determines whether the collection contains the specified VideoFormat item.

Example

C#
VB
using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
public void IndexContainsExample() 
{ 
   // reference the capture control 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   // reference the video formats object 
   VideoFormats videoformats = capturectrl.VideoCaptureFormats; 
 
   try 
   { 
      // select a video device, use your device name here instead of USB 
      if (capturectrl.VideoDevices["USB"] == null) 
         throw new Exception("No USB video device available"); 
 
      capturectrl.VideoDevices["USB"].Selected = true; 
 
      // check the index of YUY2 320 x 240 video 
      int i = videoformats.IndexOf("{32595559-0000-0010-8000-00AA00389B71}", 320, 240); 
 
      // access the format via the collection indexer 
      VideoFormat vf = videoformats[i]; 
 
      // check if the collection contains this format  
      // (it should we just got it with IndexOf above) 
      if (videoformats.Contains(vf)) 
      { 
         // set the result to what we expect 
         _result = true; 
      } 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.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 
 
   ' reference the video formats object 
   Dim videoformats As VideoFormats = capturectrl.VideoCaptureFormats 
 
   Try 
      ' select a video device, use your device name here instead of USB 
      If capturectrl.VideoDevices("USB") Is Nothing Then 
         Throw New Exception("No USB video device available") 
      End If 
 
      capturectrl.VideoDevices("USB").Selected = True 
 
      ' check the index of YUY2 320 x 240 video 
      Dim i As Integer = videoformats.IndexOf("{32595559-0000-0010-8000-00AA00389B71}", 320, 240) 
 
      ' access the format via the collection indexer 
      Dim vf As VideoFormat = videoformats(i) 
 
      ' check if the collection contains this format  
      ' (it should we just got it with IndexOf above) 
      If videoformats.Contains(vf) 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

Help Version 19.0.2017.10.19
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Leadtools.MediaFoundation Assembly