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LoadPage Event
See Also  Example
Leadtools.Codecs Namespace > RasterCodecs Class : LoadPage Event



Occurs once for each page loaded from an image file.

Syntax

Visual Basic (Declaration) 
Public Event LoadPage() As EventHandler(Of CodecsPageEventArgs)
Visual Basic (Usage)Copy Code
Dim instance As RasterCodecs
Dim handler As EventHandler(Of CodecsPageEventArgs)
 
AddHandler instance.LoadPage, handler
C# 
public event EventHandler<CodecsPageEventArgs> LoadPage()
C++/CLI 
public:
event EventHandler<CodecsPageEventArgs>^ LoadPage();

Example

Visual BasicCopy Code
Private Sub Codecs_LoadSavePage(ByVal sender As Object, ByVal e As CodecsPageEventArgs)
   If e.State = CodecsPageEventState.After Then
      Console.WriteLine("The image has been processed")
   Else
      Console.WriteLine("The image has not processed yet")
   End If
   If e.Page > 5 Then
      e.Command = CodecsPageEventCommand.Stop
   End If

   Console.WriteLine("File name is: {0}", e.FileName)
   If Not e.Image Is Nothing Then
      Console.WriteLine("The Image width and height is: {0},{1}", e.Image.Width, e.Image.Height)
   End If
   Console.WriteLine("Page Index is: {0}", e.Page)
   Console.WriteLine("Page Count is: {0}", e.PageCount)
End Sub


Public Sub LoadPageExample()
   RasterCodecs.Startup()
   Dim codecs As RasterCodecs = New RasterCodecs()

   AddHandler codecs.LoadPage, AddressOf Codecs_LoadSavePage
   AddHandler codecs.SavePage, AddressOf Codecs_LoadSavePage

   Dim image As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp")
   codecs.Save(image, LeadtoolsExamples.Common.ImagesPath.Path + "loadsave.jpg", RasterImageFormat.Jpeg, image.BitsPerPixel)

   RemoveHandler codecs.LoadPage, AddressOf Codecs_LoadSavePage
   RemoveHandler codecs.SavePage, AddressOf Codecs_LoadSavePage

   ' Clean up
   codecs.Dispose()
   image.Dispose()
   RasterCodecs.Shutdown()
End Sub
C#Copy Code
private void Codecs_LoadSavePage(object sender, CodecsPageEventArgs e) 
{ 
   if(e.State == CodecsPageEventState.After) 
      Console.WriteLine("The image has been processed"); 
   else 
      Console.WriteLine("The image has not processed yet"); 
   if(e.Page > 5) 
      e.Command = CodecsPageEventCommand.Stop; 
 
   Console.WriteLine("File name is: {0}", e.FileName); 
   if(e.Image != null) 
      Console.WriteLine("The Image width and height is: {0},{1}", e.Image.Width, e.Image.Height); 
   Console.WriteLine("Page Index is: {0}", e.Page); 
   Console.WriteLine("Page Count is: {0}", e.PageCount); 
} 
 
public void LoadPageExample() 
{ 
   RasterCodecs.Startup(); 
   RasterCodecs codecs = new RasterCodecs(); 
 
   codecs.LoadPage += new EventHandler<CodecsPageEventArgs>(Codecs_LoadSavePage); 
   codecs.SavePage += new EventHandler<CodecsPageEventArgs>(Codecs_LoadSavePage); 
 
   RasterImage image = codecs.Load( LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp"); 
   codecs.Save(image,  LeadtoolsExamples.Common.ImagesPath.Path + "loadsave.jpg", RasterImageFormat.Jpeg, image.BitsPerPixel); 
 
   codecs.LoadPage -= new EventHandler<CodecsPageEventArgs>(Codecs_LoadSavePage); 
   codecs.SavePage -= new EventHandler<CodecsPageEventArgs>(Codecs_LoadSavePage); 
 
   // Clean up 
   codecs.Dispose(); 
   image.Dispose(); 
   RasterCodecs.Shutdown(); 
}

Remarks

This event will fire once for each page loaded with any of the RasterCodecs.Load(String) methods. You can use this event to get information about the image pages being loaded or to skip loading certain pages.

Requirements

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

See Also