CanSaveObjectSettings Method (PlayCtrl)

Determines whether the specified settings can be saved.

Syntax

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public virtual bool CanSaveObjectSettings( 
   PlaySettings flags
)

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

'Usage
 
Dim instance As PlayCtrl
Dim flags As PlaySettings
Dim value As Boolean
 
value = instance.CanSaveObjectSettings(flags)

public virtual bool CanSaveObjectSettings( 
   PlaySettings flags
)

 function Leadtools.Multimedia.PlayCtrl.CanSaveObjectSettings( 
   flags 
)

public:
virtual bool CanSaveObjectSettings( 
   PlaySettings flags
)

Parameters

flags: A combination of PlaySettings enumeration values.

Return Value

true if the specified settings can be saved; otherwise, false if one or more of the specified settings cannot be saved.

Remarks

Play 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. To make sure the settings you want to save can be saved, call CanSaveObjectSettings before calling either SaveSettingsToFile or SaveSettingsToStream. 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. If multiple settings are combined in the flags parameter, all of the 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

Public _result As Boolean = False
      Public _form As PlayCtrlForm = New PlayCtrlForm()
      Public _playctrl As PlayCtrl
      Public _streamSettings As String = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_ObjectSettingsExample_Stream.xml")
      Public _fileSettings As String = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_ObjectSettingsExample.xml")

      Public Sub ObjectSettingsExample()
         ' reference the play control
         _playctrl = _form.PlayCtrl

         ' input files
         Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_Source.avi")

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

            ' save the settings to a file
            If SaveFileSettings() Then
               ' now clear the selected processors again
               _playctrl.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 = _playctrl.SelectedVideoProcessors.Contains(pVideoDizzy)
               End If
            End If

            ' save the settings to a stream
            If SaveStreamSettings() Then
               ' now clear the selected processors again
               _playctrl.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 _playctrl.SelectedVideoProcessors.Contains(pVideoDizzy)
               End If
            End If
         Catch e1 As Exception
            _result = False
         End Try
      End Sub

      Private Sub LoadFileSettings()
         _playctrl.LoadSettingsFromFile(_fileSettings, PlaySettings.Processors)
      End Sub

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

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

      Private Function SaveStreamSettings() As Boolean
         '  check if we can save the processors settings
         If _playctrl.CanSaveObjectSettings(PlaySettings.Processors) Then
            Dim settings As Stream = New StreamWriter(_streamSettings, False).BaseStream
            _playctrl.SaveSettingsToStream(settings, PlaySettings.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 175\Media";
End Class

public bool _result = false;
      public PlayCtrlForm _form = new PlayCtrlForm();
      public PlayCtrl _playctrl;
      public string _streamSettings =Path.Combine(LEAD_VARS.MediaDir,"PlayCtrl_ObjectSettingsExample_Stream.xml");
      public string _fileSettings =Path.Combine(LEAD_VARS.MediaDir,"PlayCtrl_ObjectSettingsExample.xml");

      public void ObjectSettingsExample()
      {
         // reference the play control
         _playctrl = _form.PlayCtrl;

         // input files
         string inFile =Path.Combine(LEAD_VARS.MediaDir,"PlayCtrl_Source.avi");

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

            // save the settings to a file
            if (SaveFileSettings())
            {
               // now clear the selected processors again
               _playctrl.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 = _playctrl.SelectedVideoProcessors.Contains(pVideoDizzy);
               }
            }

            // save the settings to a stream
            if (SaveStreamSettings())
            {
               // now clear the selected processors again
               _playctrl.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 &= _playctrl.SelectedVideoProcessors.Contains(pVideoDizzy);
               }
            }
         }
         catch (Exception)
         {
            _result = false;
         }
      }

      private void LoadFileSettings()
      {
         _playctrl.LoadSettingsFromFile(_fileSettings, PlaySettings.Processors);
      }

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

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

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

static class LEAD_VARS
{
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 175\Media";
}

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

PlayCtrl Class
PlayCtrl Members