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NearestSelection Property

Summary

Gets the index of the video capture input that was last selected in the video cross bar property page.

Syntax

C++/CLI

public int NearestSelection { get; }

public: 
property int NearestSelection { 
   int get(); 
}

Property Value

The zero-based index of the nearest selected item; or -1 if no item is selected.

Remarks

If the Selection is -1, despite the fact there is a selected input, then the selected video capture input does not match the selected audio input. In this case, check the value of the NearestSelection property to retrieve the index of the last selected capture input. Set the Selection property to the value in the NearestSelection property to fix the problem. Please note that if an audio-video pair are mismatched intentionally, it may be best to keep the pair mismatched. For more information on unmatched pairs of video and audio inputs, refer to the CaptureInputs object.

Example

using Leadtools; 
using Leadtools.Multimedia; 
using LeadtoolsMultimediaExamples.Fixtures; 
 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
public void NearestSelectionExample() 
{ 
   // reference the capture control and its video inputs 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   // set a video device first.  use your video device's name here 
   if (capturectrl.VideoDevices["Analog"] == null) 
      throw new Exception("No Analog video tuner device available"); 
 
   capturectrl.VideoDevices["Analog"].Selected = true; 
 
   // set a video device first.  use your video device's name here 
   if (capturectrl.AudioDevices["Analog"] == null) 
      throw new Exception("No matching Analog audio device available"); 
 
   capturectrl.AudioDevices["Analog"].Selected = true; 
 
   try 
   { 
      // get the video inputs collection 
      CaptureInputs videoInputs = capturectrl.VideoInputs; 
 
      // select the video tuner input 
      videoInputs["Video Tuner"].Selected = true; 
 
      // select the nearest selection to the last selection 
      videoInputs.Selection = videoInputs.NearestSelection; 
 
      // set the result to what we expect 
      _result = true; 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
}

Requirements

Target Platforms

Reference

CaptureInputs Class

CaptureInputs Members

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Help Version 23.0.2024.2.29

Leadtools.Multimedia Assembly

Introduction

Getting Started

Namespaces

Leadtools.Multimedia Namespace

Leadtools.Multimedia.Common Namespace

Assemblies