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Item Property

Summary

Gets or sets the TargetVideoFormat item at the specified index.

Syntax

C++/CLI

public TargetVideoFormat Item( 
   int index 
) { get; set; }

public: 
property TargetVideoFormat^ Item { 
   TargetVideoFormat^ get(int index); 
   void set (int index, TargetVideoFormat^ ); 
}

Parameters

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

Property Value

The TargetVideoFormat 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 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

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
public void IndexContainsExample() 
{ 
   // reference the capture control 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   try 
   { 
      // set an video device first, you should use your video device name here 
      if (capturectrl.VideoDevices["USB"] == null) 
         throw new Exception("No USB video device available"); 
 
      capturectrl.VideoDevices["USB"].Selected = true; 
 
      // reference the target formats object 
      TargetFormats formats = capturectrl.TargetFormats; 
 
      // reference the target format object 
      TargetFormat tf = formats[TargetFormatType.MP4]; 
 
      // reference the target video formats object 
      TargetVideoFormats targetformats = tf.VideoFormats; 
 
      // check the index using a name string 
      int i = targetformats.IndexOf("{34363248-0000-0010-8000-00AA00389B71}");// H264 
 
      // get target video format object 
      TargetVideoFormat tvf = targetformats[i]; 
 
      // make sure the target video format object's name equals {34363248-0000-0010-8000-00AA00389B71} 
      // which should have the same index of the selection 
      if (tvf.Name == "{34363248-0000-0010-8000-00AA00389B71}" && targetformats.Selection == i) 
      { 
         // get target video format friendly name, use it for view propose. 
         string friendlyname = tvf.FriendlyName; 
      } 
      else 
         throw new Exception(); 
 
      // select it 
      tvf.Selected = true; 
 
      // check if the collection contains this format  
      // (it should we just got it with IndexOf above) 
      if (targetformats.Contains(tvf)) 
      { 
         // set the result to what we expect 
         _result = true; 
      } 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
}

Requirements

Target Platforms

Reference

TargetVideoFormats Class

TargetVideoFormats Members

Overload List

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