Selection Property (CaptureInputs)

Visual Basic
C#
C++/CLI

'Declaration
 
Public Property Selection As Integer

'Usage
 
Dim instance As CaptureInputs
Dim value As Integer
 
instance.Selection = value
 
value = instance.Selection

public int Selection {get; set;}

public:
property int Selection {
   int get();
   void set (    int value);
}

Property Value

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

If this property is -1, then check the number of capture inputs in the Count Property. If the Count property is non-zero then the Video and Audio inputs do not match. This is only a warning and not an error. The inputs can be left the way they are.

For more information on unmatched pairs of video and audio inputs, refer to CaptureInputs Object.

Assignment can raise an error exception. For more information, refer to the Error Codes.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.MediaFoundation
Imports LeadtoolsMediaFoundationExamples.Fixtures

Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public Sub CaptureInputsExample()
   Dim inputName, inputFriendlyName As String
   Dim selection As Integer

   ' reference the capture control
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl

   ' select a video device, use your device name here instead of Analog
   If capturectrl.VideoDevices("Analog") Is Nothing Then
      Throw New Exception("No Analog video tuner device available")
   End If

   capturectrl.VideoDevices("Analog").Selected = True

   ' get the audio inputs object
   Dim inputs As CaptureInputs = capturectrl.VideoInputs

   Try
      ' select an input by name if possible
      If Not inputs("Video Composite") Is Nothing Then
         inputs("Video Composite").Selected = True
      End If

      ' get the current selected input
      selection = inputs.Selection

      For Each ci As CaptureInput In inputs
         ' get the inputs properties
         inputName = ci.Name
         inputFriendlyName = ci.FriendlyName

         ' if we found the video tuner input
         If inputFriendlyName = "Video Tuner" Then
            ' select it and break
            ci.Selected = True
            Exit For
         End If
      Next ci

      ' set the result to what we expect
      _result = (selection <> inputs.Selection)

   Catch e1 As Exception
      _result = False
   End Try
End Sub

using Leadtools;
using Leadtools.MediaFoundation;
using LeadtoolsMediaFoundationExamples.Fixtures;

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void CaptureInputsExample()
{
   string inputName, inputFriendlyName;
   int selection;

   // reference the capture control
   CaptureCtrl capturectrl = _form.CaptureCtrl;

   // select a video device, use your device name here instead of Analog
   if (capturectrl.VideoDevices["Analog"] == null)
      throw new Exception("No Analog video tuner device available");

   capturectrl.VideoDevices["Analog"].Selected = true;

   // get the audio inputs object
   CaptureInputs inputs = capturectrl.VideoInputs;

   try
   {
      // select an input by name if possible
      if (inputs["Video Composite"] != null)
         inputs["Video Composite"].Selected = true;

      // get the current selected input
      selection = inputs.Selection;

      foreach (CaptureInput ci in inputs)
      {
         // get the inputs properties
         inputName = ci.Name;
         inputFriendlyName = ci.FriendlyName;

         // if we found the video tuner input
         if (inputFriendlyName == "Video Tuner")
         {
            // select it and break
            ci.Selected = true;
            break;
         }
      }

      // set the result to what we expect
      _result = (selection != inputs.Selection);

   }
   catch (Exception)
   {
      _result = false;
   }
}

Target Platforms

Reference

CaptureInputs Class
CaptureInputs Members