LEADTOOLS Multimedia (Leadtools.MediaFoundation assembly)

Selection Property (TargetVideoFormats)

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Example 



Gets or sets the zero-based index of the currently selected TargetVideoFormat item.
Syntax
'Declaration
 
Public Property Selection As Integer
'Usage
 
Dim instance As TargetVideoFormats
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; otherwise -1 if no item is selected.
Remarks
Gets or sets the zero-based index of the currently selected TargetVideoFormat item. Assignment could raise an error exception. For more information, refer to the Error Codes.
Example
Copy Code  
Imports Leadtools
Imports Leadtools.MediaFoundation
Imports LeadtoolsMediaFoundationExamples.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 video device first, you should use your video device name here
      If capturectrl.VideoDevices("USB") Is Nothing Then
         Throw New Exception("No USB video device available")
      End If

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

      ' reference the target formats object
      Dim formats As TargetFormats = capturectrl.TargetFormats

      ' reference the target format object
      Dim tf As TargetFormat = formats(TargetFormatType.MP4)

      ' reference the target video formats object
      Dim tvformats As TargetVideoFormats = tf.VideoFormats

      ' check the index using a name string
      Dim i As Integer = tvformats.IndexOf("{34363248-0000-0010-8000-00AA00389B71}") ' H264

      ' get target video format object
      Dim tvf As TargetVideoFormat = tvformats(i)

      ' make sure the target video format object's name equals {00000161-0000-0010-8000-00AA00389B71}
      If tvf.Name = "{34363248-0000-0010-8000-00AA00389B71}" Then
         ' get target video format friendly name, use it for view propose.
         Dim friendlyname As String = tvf.FriendlyName
      Else
         Throw New Exception()
      End If

      ' select it
      tvf.Selected = True

      ' check if the collection contains this format 
      ' (it should we just got it with IndexOf above)
      If tvformats.Contains(tvf) Then
         ' set the result to what we expect
         _result = True
      End If
   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 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 tvformats = tf.VideoFormats;

      // check the index using a name string
      int i = tvformats.IndexOf("{34363248-0000-0010-8000-00AA00389B71}");// H264

      // get target video format object
      TargetVideoFormat tvf = tvformats[i];

      // make sure the target video format object's name equals {34363248-0000-0010-8000-00AA00389B71}
      if (tvf.Name == "{34363248-0000-0010-8000-00AA00389B71}")
      {
         // 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 (tvformats.Contains(tvf))
      {
         // set the result to what we expect
         _result = true;
      }
   }
   catch (Exception)
   {
      _result = false;
   }
}
Requirements

Target Platforms

See Also

Reference

TargetVideoFormats Class
TargetVideoFormats Members

 

 


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