Item(String) Property

Visual Basic
C#
C++/CLI

'Declaration
 
Public Overloads ReadOnly Property Item( _
   ByVal name As String _
) As TargetDevice

'Usage
 
Dim instance As TargetDevices
Dim name As String
Dim value As TargetDevice
 
value = instance.Item(name)

public TargetDevice Item( 
   string name
) {get;}

public:
property TargetDevice^ Item {
   TargetDevice^ get(String^ name);
}

Parameters

name: The string representing the name of the item being obtained.

Property Value

The TargetDevice item with the specified name.

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.
System.NullReferenceException	The exception that is thrown when there is an attempt to dereference a null object reference.

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. Target Device names are unique. An application can use this method to find a specific device. A Target Device name can be retrieved by calling the TargetDevice.Name property or by using the LTMM DirectShow Filter List Utility. If the method fails, an error is raised. For more information, refer to the Error Codes.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

Public _result As Boolean = False
Public _form As ConvertCtrlForm = New ConvertCtrlForm()
Public Sub IndexContainsExample()
   ' reference the capture control
   Dim convertctrl As ConvertCtrl = _form.ConvertCtrl

   ' input file
   Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_Source.avi")

   Try
      ' set the input file
      convertctrl.SourceFile = inFile

      ' reference the video target devices object
      Dim devices As TargetDevices = convertctrl.TargetDevices

      ' check the index of an HD Audio device
      Dim i As Integer = devices.IndexOf("HD Audio")

      Dim dev As TargetDevice = 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

Public NotInheritable Class LEAD_VARS
Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media"
End Class

using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;

public bool _result = false;
public ConvertCtrlForm _form = new ConvertCtrlForm();
public void IndexContainsExample()
{
   // reference the capture control
   ConvertCtrl convertctrl = _form.ConvertCtrl;

   // input file
   string inFile = Path.Combine(LEAD_VARS.MediaDir,"ConvertCtrl_Source.avi");

   try
   {
      // set the input file
      convertctrl.SourceFile = inFile;

      // reference the video target devices object
      TargetDevices devices = convertctrl.TargetDevices;

      // check the index of an HD Audio device
      int i = devices.IndexOf("HD Audio");

      TargetDevice 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;
   }
}

static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media";
}

Target Platforms

Reference

TargetDevices Class
TargetDevices Members
Overload List