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LEADTOOLS (Leadtools assembly)
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Page Property








Leadtools Namespace > RasterImage Class : Page Property
Gets or sets the current active page for this RasterImage.
Syntax
public int Page {get; set;}
'Declaration
 

Public Property Page As Integer
'Usage
 

Dim instance As RasterImage
Dim value As Integer
 
instance.Page = value
 
value = instance.Page
public int Page {get; set;}
@property (nonatomic, assign) NSInteger page
public int getPage()
public void setPage(int value)
            
 <br/>get_Page();<br/>set_Page(value);<br/>Object.defineProperty('Page'); 
public:
property int Page {
   int get();
   void set (    int value);
}

Property Value

The 1-based index of the current page for this RasterImage.
Remarks

The RasterImage object can hold multiple pages with different sizes. The AddPage, AddPages, InsertPage and InsertPages methods allows adding new pages to an existing RasterImage.

The RemovePageAt, RemovePages and RemoveAllPages methods allows removing existing pages from a RasterImage object.

The ReplacePage and ReplacePages methods allows replace existing pages in a RasterImage object.

The PageCount property holds the total number of pages in a RasterImage object while the Page property allows you to change the current active page.

The current active page (The page indicated by the Page property) is used by default when accessing the data of a RasterImage object unless otherwise indicated.

Example

This example demonstrates how to deal with multi-page RasterImage objects.

Copy Code   
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Controls
Imports Leadtools.Dicom
Imports Leadtools.Drawing
Imports Leadtools.Svg

      
Public Sub PagesExample()
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Options.Load.AllPages = True
   Dim srcFileName1 As String = Path.Combine(LEAD_VARS.ImagesDir, "eye.gif")
   Dim srcFileName2 As String = Path.Combine(LEAD_VARS.ImagesDir, "image1.cmp")

   ' Load the multi-page image
   Dim srcImage As RasterImage = codecs.Load(srcFileName1)

   ' Show the number of pages in this file
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Show and change the active page
   Console.WriteLine("Active page: {0}", srcImage.Page)
   srcImage.Page = 3
   Console.WriteLine("Active page: {0}", srcImage.Page)
   srcImage.Page = 1

   ' Load a single page image and add it to the end
   Dim pageImage As RasterImage = codecs.Load(srcFileName2)
   Console.WriteLine("Adding a single page")
   srcImage.AddPage(pageImage)
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Load a multi page image and add a few pages to this image
   pageImage = codecs.Load(srcFileName1)
   Console.WriteLine("Adding multi-pages")
   srcImage.AddPages(pageImage, 1, 2)
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Insert a page in the middle
   Console.WriteLine("Inserting a page")
   srcImage.InsertPage(4, pageImage)
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Insert the rest of the pages at the beginning
   Console.WriteLine("Inserting pages")
   srcImage.InsertPages(0, pageImage, 1, -1)
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Remove the first page
   Console.WriteLine("Removing a page")
   srcImage.RemovePageAt(1)
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Remove the last 3 pages
   Console.WriteLine("Removing pages")
   srcImage.RemovePages(srcImage.PageCount - 3, -1)
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Remove all the pages (leaves 1)
   Console.WriteLine("Removing all pages")
   srcImage.RemoveAllPages()
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   srcImage.Dispose()
   codecs.Dispose()
End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Dicom;
using Leadtools.Drawing;
using Leadtools.Controls;
using Leadtools.Svg;

      
public void PagesExample()
{
   RasterCodecs codecs = new RasterCodecs();
   codecs.Options.Load.AllPages = true;
   string srcFileName1 = Path.Combine(ImagesPath.Path, "eye.gif");
   string srcFileName2 = Path.Combine(ImagesPath.Path, "image1.cmp");

   // Load the multi-page image
   RasterImage srcImage = codecs.Load(srcFileName1);

   // Show the number of pages in this file
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Show and change the active page
   Console.WriteLine("Active page: {0}", srcImage.Page);
   srcImage.Page = 3;
   Console.WriteLine("Active page: {0}", srcImage.Page);
   srcImage.Page = 1;

   // Load a single page image and add it to the end
   RasterImage pageImage = codecs.Load(srcFileName2);
   Console.WriteLine("Adding a single page");
   srcImage.AddPage(pageImage);
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Load a multi page image and add a few pages to this image
   pageImage = codecs.Load(srcFileName1);
   Console.WriteLine("Adding multi-pages");
   srcImage.AddPages(pageImage, 1, 2);
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Insert a page in the middle
   Console.WriteLine("Inserting a page");
   srcImage.InsertPage(4, pageImage);
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Insert the rest of the pages at the beginning
   Console.WriteLine("Inserting pages");
   srcImage.InsertPages(0, pageImage, 1, -1);
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Remove the first page
   Console.WriteLine("Removing a page");
   srcImage.RemovePageAt(1);
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Remove the last 3 pages
   Console.WriteLine("Removing pages");
   srcImage.RemovePages(srcImage.PageCount - 3, -1);
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Remove all the pages (leaves 1)
   Console.WriteLine("Removing all pages");
   srcImage.RemoveAllPages();
   Console.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   srcImage.Dispose();
   codecs.Dispose();
}
RasterImageExamples.prototype.PagesExample = function ( )
{
   Tools.SetLicense ( ) ;
   with ( Leadtools ) {
      with ( Leadtools.Codecs ) {
         var codecs = new RasterCodecs();

         var srcFileName1 = "Assets\\eye.gif";
         var srcFileName2 = "Assets\\Image1.cmp";
         var srcImage;
         // Load the multi-page image
         return Tools.AppInstallFolder().getFileAsync(srcFileName1).then(function (loadFile) {

            return codecs.loadAsync(LeadStreamFactory.create(loadFile));
         })
         .then(function (img) {
            srcImage = img;
            // Show the number of pages in this file
            console.info("Pages in the image: ", srcImage.pageCount);

            // Show and change the active page
            console.info("Active page: ", srcImage.page);
            srcImage.Page = 3;
            console.info("Active page: ", srcImage.page);
            srcImage.Page = 1;

            // Load a single page image and add it to the end
            return Tools.AppInstallFolder().getFileAsync(srcFileName2);
         })
         .then(function (loadFile) {
            return codecs.loadAsync(LeadStreamFactory.create(loadFile));
         })
         .then(function (pageImage) {
            console.info("Adding a single page");

            srcImage.addPage(pageImage);
            console.info("Pages in the image: ", srcImage.pageCount);

            // Load a multi page image and add a few pages to this image
            return Tools.AppInstallFolder().getFileAsync(srcFileName1);
         })
         .then(function (loadFile) {
            return codecs.loadAsync(LeadStreamFactory.create(loadFile));
         })
         .then(function (pageImage) {
            console.info("Adding multi-pages");
            srcImage.addPages(pageImage, 1, 2);
            console.info("Pages in the image: ", srcImage.pageCount);

            // Insert a page in the middle
            console.info("Inserting a page");
            srcImage.insertPage(4, pageImage);
            console.info("Pages in the image: ", srcImage.pageCount);

            // Insert the rest of the pages at the beginning
            console.info("Inserting pages");
            srcImage.insertPages(0, pageImage, 1, -1);
            console.info("Pages in the image: ", srcImage.pageCount);

            // Remove the first page
            console.info("Removing a page");
            srcImage.removePageAt(1);
            console.info("Pages in the image: ", srcImage.pageCount);

            // Remove the last 3 pages
            console.info("Removing pages");
            srcImage.removePages(srcImage.pageCount - 3, -1);
            console.info("Pages in the image: ", srcImage.pageCount);

            // Remove all the pages (leaves 1)
            console.info("Removing all pages");
            srcImage.removeAllPages();
            console.info("Pages in the image: ", srcImage.pageCount);

            srcImage.close();
            codecs.close();
         });
      
      }}
   }
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Dicom;

      
public async Task PagesExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName1 = @"Assets\eye.gif";
   string srcFileName2 = @"Assets\Image1.cmp";

   // Load the multi-page image
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName1);
   RasterImage srcImage = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Show the number of pages in this file
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Show and change the active page
   Debug.WriteLine("Active page: {0}", srcImage.Page);
   srcImage.Page = 3;
   Debug.WriteLine("Active page: {0}", srcImage.Page);
   srcImage.Page = 1;

   // Load a single page image and add it to the end
   loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName2);
   RasterImage pageImage = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));
   Debug.WriteLine("Adding a single page");
   srcImage.AddPage(pageImage);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Load a multi page image and add a few pages to this image
   loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName1);
   pageImage = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));
   Debug.WriteLine("Adding multi-pages");
   srcImage.AddPages(pageImage, 1, 2);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Insert a page in the middle
   Debug.WriteLine("Inserting a page");
   srcImage.InsertPage(4, pageImage);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Insert the rest of the pages at the beginning
   Debug.WriteLine("Inserting pages");
   srcImage.InsertPages(0, pageImage, 1, -1);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Remove the first page
   Debug.WriteLine("Removing a page");
   srcImage.RemovePageAt(1);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Remove the last 3 pages
   Debug.WriteLine("Removing pages");
   srcImage.RemovePages(srcImage.PageCount - 3, -1);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Remove all the pages (leaves 1)
   Debug.WriteLine("Removing all pages");
   srcImage.RemoveAllPages();
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   srcImage.Dispose();
   codecs.Dispose();
}
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Dicom;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Examples;
using Leadtools.Windows.Media;

public void PagesExample(RasterImage image)
{
   RasterImage srcImage = image; // should be a multi-page image (eye.gif)
   // Show the number of pages in this file
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Show and change the active page
   Debug.WriteLine("Active page: {0}", srcImage.Page);
   srcImage.Page = 3;
   Debug.WriteLine("Active page: {0}", srcImage.Page);
   srcImage.Page = 1;

   // create a new image and add it to the end
   RasterImage pageImage = new RasterImage(RasterMemoryFlags.Conventional, 200, 200, 8, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, null, null, 0);
   Debug.WriteLine("Adding a single page");
   srcImage.AddPage(pageImage);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // create a multi page image and add a few pages to this image
   RasterImage multiPageImage = new RasterImage(RasterMemoryFlags.Conventional, 200, 200, 8, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, null, null, 0);
   // add a few more pages
   for (int x = 0; x < 10; x++)
   {
      pageImage = new RasterImage(RasterMemoryFlags.Conventional, 200, 200, 8, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, null, null, 0);
      multiPageImage.AddPage(pageImage);
   }

   Debug.WriteLine("Adding multi-pages");
   srcImage.AddPages(multiPageImage, 1, 2);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Insert a page in the middle
   Debug.WriteLine("Inserting a page");
   srcImage.InsertPage(4, multiPageImage);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Insert the rest of the pages at the beginning
   Debug.WriteLine("Inserting pages");
   srcImage.InsertPages(0, multiPageImage, 1, -1);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Remove the first page
   Debug.WriteLine("Removing a page");
   srcImage.RemovePageAt(1);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Remove the last 3 pages
   Debug.WriteLine("Removing pages");
   srcImage.RemovePages(srcImage.PageCount - 3, -1);
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   // Remove all the pages (leaves 1)
   Debug.WriteLine("Removing all pages");
   srcImage.RemoveAllPages();
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount);

   srcImage.Dispose();
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Dicom
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Windows.Media

Public Sub PagesExample(ByVal image As RasterImage)
   Dim srcImage As RasterImage = image ' should be a multi-page image (eye.gif)
   ' Show the number of pages in this file
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Show and change the active page
   Debug.WriteLine("Active page: {0}", srcImage.Page)
   srcImage.Page = 3
   Debug.WriteLine("Active page: {0}", srcImage.Page)
   srcImage.Page = 1

   ' create a new image and add it to the end
   Dim pageImage As RasterImage = New RasterImage(RasterMemoryFlags.Conventional, 200, 200, 8, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, Nothing, Nothing, 0)
   Debug.WriteLine("Adding a single page")
   srcImage.AddPage(pageImage)
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' create a multi page image and add a few pages to this image
   Dim multiPageImage As RasterImage = New RasterImage(RasterMemoryFlags.Conventional, 200, 200, 8, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, Nothing, Nothing, 0)
   ' add a few more pages
   For x As Integer = 0 To 9
      pageImage = New RasterImage(RasterMemoryFlags.Conventional, 200, 200, 8, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, Nothing, Nothing, 0)
      multiPageImage.AddPage(pageImage)
   Next x

   Debug.WriteLine("Adding multi-pages")
   srcImage.AddPages(multiPageImage, 1, 2)
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Insert a page in the middle
   Debug.WriteLine("Inserting a page")
   srcImage.InsertPage(4, multiPageImage)
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Insert the rest of the pages at the beginning
   Debug.WriteLine("Inserting pages")
   srcImage.InsertPages(0, multiPageImage, 1, -1)
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Remove the first page
   Debug.WriteLine("Removing a page")
   srcImage.RemovePageAt(1)
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Remove the last 3 pages
   Debug.WriteLine("Removing pages")
   srcImage.RemovePages(srcImage.PageCount - 3, -1)
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   ' Remove all the pages (leaves 1)
   Debug.WriteLine("Removing all pages")
   srcImage.RemoveAllPages()
   Debug.WriteLine("Pages in the image: {0}", srcImage.PageCount)

   srcImage.Dispose()
End Sub
Requirements

Target Platforms

See Also

Reference

RasterImage Class
RasterImage Members

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