CanSaveObjectSettings Method (CaptureCtrl)

Determines whether the specified settings can be saved.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public Overridable Function CanSaveObjectSettings( _
   ByVal flags As CaptureSettings _
) As Boolean

'Usage
 
Dim instance As CaptureCtrl
Dim flags As CaptureSettings
Dim value As Boolean
 
value = instance.CanSaveObjectSettings(flags)

public virtual bool CanSaveObjectSettings( 
   CaptureSettings flags
)

public:
virtual bool CanSaveObjectSettings( 
   CaptureSettings flags
)

Parameters

flags: A combination of CaptureSettings enumeration values.

Remarks

The capture object settings can be saved to a stream by calling SaveSettingsToStream. These settings can also be saved to a file by calling SaveSettingsToFile. Settings saved to a file can be loaded using LoadSettingsFromFile. Settings saved to a stream can be loaded using LoadSettingsFromStream. It may be helpful to call CanSaveObjectSettings before calling either SaveSettingsToFile or SaveSettingsToStream, to make sure the settings you want to save can be saved. If either SaveSettingsToFile or SaveSettingsToStream is called for settings that cannot be saved, the save function will fail.

Multiple settings can be combined in the Flags parameter.

Note: If multiple settings are combined in the flags parameter, all those settings must be capable of being saved in order for this method to return true.

Example

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

Copy Code

Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public _capturectrl As CaptureCtrl
Public _streamSettings As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_ObjectSettingsExample_Stream.xml")
Public _fileSettings As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_ObjectSettingsExample.xml")

Public Sub ObjectSettingsExample()
   ' reference the play control
   _capturectrl = _form.CaptureCtrl

   ' output file
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_ObjectSettingsExample.avi")

   Try
      Dim pVideoDizzy As Processor = _capturectrl.VideoProcessors.EFXDizzy
      ' set a video processor
      _capturectrl.SelectedVideoProcessors.Add(pVideoDizzy)

      ' save the settings to a file
      If SaveFileSettings() Then
         ' now clear the selected processors again
         _capturectrl.SelectedVideoProcessors.Clear()

         ' check if stream file exists
         If File.Exists(_fileSettings) Then
            ' load the saved settings from a file
            ' and check if the processor is selected again
            LoadFileSettings()

            ' set the result 
            _result = _capturectrl.SelectedVideoProcessors.Contains(pVideoDizzy)
         End If
      End If

      ' save the settings to a stream
      If SaveStreamSettings() Then
         ' now clear the selected processors again
         _capturectrl.SelectedVideoProcessors.Clear()

         ' check if stream file exists
         If File.Exists(_streamSettings) Then
            ' load the saved settings from a stream 
            ' and check if the processor is selected again
            LoadStreamSettings()

            ' set the result 
            _result = _result And _capturectrl.SelectedVideoProcessors.Contains(pVideoDizzy)
         End If
      End If
   Catch e1 As Exception
      _result = False
   End Try
End Sub

Private Sub LoadFileSettings()
   _capturectrl.LoadSettingsFromFile(_fileSettings, CaptureSettings.Processors)
End Sub

Private Function SaveFileSettings() As Boolean
   '  check if we can save the processors settings
   If _capturectrl.CanSaveObjectSettings(CaptureSettings.Processors) Then
      _capturectrl.SaveSettingsToFile(_fileSettings, CaptureSettings.Processors)
      Return True
   End If
   Return False
End Function

Private Sub LoadStreamSettings()
   Dim settings As Stream = New StreamReader(_streamSettings).BaseStream
   _capturectrl.LoadSettingsFromStream(settings, CaptureSettings.Processors)
   settings.Close()
End Sub

Private Function SaveStreamSettings() As Boolean
   '  check if we can save the processors settings
   If _capturectrl.CanSaveObjectSettings(CaptureSettings.Processors) Then
      Dim settings As Stream = New StreamWriter(_streamSettings, False).BaseStream
      _capturectrl.SaveSettingsToStream(settings, CaptureSettings.Processors)
      settings.Close()
      Return True
   End If
   Return False
End Function

Public NotInheritable Class LEAD_VARS
Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media"
End Class

using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public CaptureCtrl _capturectrl;
public string _streamSettings =Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_ObjectSettingsExample_Stream.xml");
public string _fileSettings = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_ObjectSettingsExample.xml");

public void ObjectSettingsExample()
{
   // reference the play control
   _capturectrl = _form.CaptureCtrl;

   // output file
   string outFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_ObjectSettingsExample.avi");

   try
   {
      Processor pVideoDizzy = _capturectrl.VideoProcessors.EFXDizzy;
      // set a video processor
      _capturectrl.SelectedVideoProcessors.Add(pVideoDizzy);

      // save the settings to a file
      if (SaveFileSettings())
      {
         // now clear the selected processors again
         _capturectrl.SelectedVideoProcessors.Clear();

         // check whether a stream file exists
         if (File.Exists(_fileSettings))
         {
            // load the saved settings from a file
            // and check whether the processor is selected again
            LoadFileSettings();

            // set the result 
            _result = _capturectrl.SelectedVideoProcessors.Contains(pVideoDizzy);
         }
      }

      // save the settings to a stream
      if (SaveStreamSettings())
      {
         // now clear the selected processors again
         _capturectrl.SelectedVideoProcessors.Clear();

         // check whether a stream file exists
         if (File.Exists(_streamSettings))
         {
            // load the saved settings from a stream 
            // and check whether the processor is selected again
            LoadStreamSettings();

            // set the result 
            _result &= _capturectrl.SelectedVideoProcessors.Contains(pVideoDizzy);
         }
      }
   }
   catch (Exception)
   {
      _result = false;
   }
}

private void LoadFileSettings()
{
   _capturectrl.LoadSettingsFromFile(_fileSettings, CaptureSettings.Processors);
}

private bool SaveFileSettings()
{
   //  check whether we can save the processors settings
   if (_capturectrl.CanSaveObjectSettings(CaptureSettings.Processors))
   {
      _capturectrl.SaveSettingsToFile(_fileSettings, CaptureSettings.Processors);
      return true;
   }
   return false;
}

private void LoadStreamSettings()
{
   Stream settings = new StreamReader(_streamSettings).BaseStream;
   _capturectrl.LoadSettingsFromStream(settings, CaptureSettings.Processors);
   settings.Close();
}

private bool SaveStreamSettings()
{
   //  check whether we can save the processors settings
   if (_capturectrl.CanSaveObjectSettings(CaptureSettings.Processors))
   {
      Stream settings = new StreamWriter(_streamSettings, false).BaseStream;
      _capturectrl.SaveSettingsToStream(settings, CaptureSettings.Processors);
      settings.Close();
      return true;
   }
   return false;
}

static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media";
}

Requirements

Target Platforms

Reference

CaptureCtrl Class
CaptureCtrl Members