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Item Property

Summary

Gets the VideoFormat item at the specified index.

Syntax

C++/CLI

public VideoFormat Item( 
   int index 
) { get; }

public: 
property VideoFormat^ default [int] { 
   VideoFormat^ get(int index); 
}

Parameters

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

Property Value

The VideoFormat item at the specified index.

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 makes it possible to access a specific item in the collection by using the following syntax: myCollection[index]. The C# language uses 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

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; 
 
   // 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 RGB32 320 x 240 video 
      int i = videoformats.IndexOf(Constants.MEDIASUBTYPE_RGB32, 320, 240); 
 
      // access the format via the collection indexer 
      VideoFormat vf = videoformats[i]; 
 
      // check whether 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; 
   } 
}

Requirements

Target Platforms

Reference

VideoFormats Class

VideoFormats Members

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Help Version 22.0.2022.12.7

Leadtools.Multimedia Assembly

Introduction

Getting Started

Namespaces

Leadtools.Multimedia Namespace

Leadtools.Multimedia.Common Namespace

Assemblies