Item Property (CaptureSubTypes)

Gets the CaptureSubType item at the specified index.

Overload List

Overload	Description
Item(Int32)	Gets the CaptureSubType item at the specified index.
Item(String)	Gets the CaptureSubType item with the specified name.

Exceptions

Exception	Description
System.ArgumentOutOfRangeException	The exception that is thrown when the value of an argument is outside the allowable range of values as defined by the invoked method.

Remarks

This property provides the ability to access a specific item in the collection by using the following syntax: myCollection[index] The C# language uses the this keyword to define the indexers instead of implementing the Item property. Visual Basic implements Item as a default property, which provides the same indexing functionality.

Example

C#
Visual Basic
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 IndexContainsExample()
   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("Analog") Is Nothing Then
         Throw New Exception("No Analog video device available")
      End If

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

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

      ' check for RGB24 subtype
      Dim i As Integer = stypes.IndexOf(Leadtools.MediaFoundation.Constants.MEDIASUBTYPE_YUY2)

      ' access the input via the collection indexer
      Dim cs As CaptureSubType = stypes(i)

      ' check if the collection contains this subtype 
      ' (it should we just got it with IndexOf above!)
      If stypes.Contains(cs) Then
         ' set the result to what we expect
         _result = True
      End If
   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 IndexContainsExample()
{
   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["Analog"] == null)
         throw new Exception("No Analog video device available");

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

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

      // check for RGB24 subtype
      int i = stypes.IndexOf(Constants.MEDIASUBTYPE_YUY2);

      // access the input via the collection indexer
      CaptureSubType cs = stypes[i];

      // check if the collection contains this subtype 
      // (it should we just got it with IndexOf above!)
      if (stypes.Contains(cs))
      {
         // set the result to what we expect
         _result = true;
      }
   }
   catch (Exception)
   {
      _result = false;
   }
}

Requirements

Target Platforms

Reference

CaptureSubTypes Class
CaptureSubTypes Members