LEADTOOLS Multimedia (Leadtools.Multimedia assembly)

Item(Int32) Property

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Example 



The zero-based index of the item to get or set.
Gets or sets the TargetFormat item at the specified index.
Syntax
'Declaration
 
Public Overloads Property Item( _
   ByVal index As Integer _
) As TargetFormat
'Usage
 
Dim instance As TargetFormats
Dim index As Integer
Dim value As TargetFormat
 
instance.Item(index) = value
 
value = instance.Item(index)
public TargetFormat Item( 
   int index
) {get; set;}
public:
property TargetFormat^ Item {
   TargetFormat^ get(int index);
   void set (int indexTargetFormat^ value);
}

Parameters

index
The zero-based index of the item to get or set.

Property Value

The TargetFormat item at the specified index.
Exceptions
ExceptionDescription
System.ArgumentOutOfRangeExceptionThe 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 allows access to 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
Copy Code  
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
      ' 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

      ' reference the target formats object
      Dim formats As TargetFormats = capturectrl.TargetFormats

      ' check the index using a name string
      Dim i As Integer = formats.IndexOf("WAVE")

      ' or get a target format directly, using a TargetFormatType enum
      Dim mpeg1 As TargetFormat = formats(TargetFormatType.MPEG1Audio)

      ' access the format via the collection indexer
      Dim af As TargetFormat = formats(i)

      ' check if the collection contains this format 
      ' (it should we just got it with IndexOf above)
      If formats.Contains(af) AndAlso formats.Contains(mpeg1) 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.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
   {
      // set an audio device first.  use your audio device's name here
      if (capturectrl.AudioDevices["USB"] == null)
         throw new Exception("No USB audio device available");

      capturectrl.AudioDevices["USB"].Selected = true;

      // reference the target formats object
      TargetFormats formats = capturectrl.TargetFormats;

      // check the index using a name string
      int i = formats.IndexOf("WAVE");

      // or get a target format directly, using a TargetFormatType enum
      TargetFormat mpeg1 = formats[TargetFormatType.MPEG1Audio];

      // access the format via the collection indexer
      TargetFormat af = formats[i];

      // check whether the collection contains this format 
      // (it should we just got it with IndexOf above)
      if (formats.Contains(af) && formats.Contains(mpeg1))
      {
         // set the result to what we expect
         _result = true;
      }
   }
   catch (Exception)
   {
      _result = false;
   }
}
Requirements

Target Platforms

See Also

Reference

TargetFormats Class
TargetFormats Members
Overload List

 

 


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Leadtools.Multimedia requires a Multimedia or Multimedia Suite license and unlock key. For more information, refer to: LEADTOOLS Toolkit Features