Item Property

Summary

Gets or sets the TargetFormat item at the specified index.

Syntax
C#
VB
C++
public TargetFormat Item( 
   int index 
) { get; set; } 
Public Overloads Property Item( _ 
   ByVal index As Integer _ 
) As TargetFormat 
public: 
property TargetFormat^ Item { 
   TargetFormat^ get(int index); 
   void set (int index, TargetFormat^ ); 
} 

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. VB implements Item as a default property, which provides the same indexing functionality.

Example
C#
VB
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; 
   } 
} 
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 
Requirements

Target Platforms

Help Version 20.0.2019.11.25
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2019 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Multimedia Assembly