PageCount Property

Summary

Get the number of pages in Image.

Syntax

C++/CLI

public int PageCount { get; }

public:  
   property int PageCount 
   { 
      int get() 
   }

Property Value

The total number of pages in Image. Will return 0 if Image is null.

Remarks

This value is used since RasterImage supports multipage images (frames). ImageViewerPagerInteractiveMode uses the value of this property to find the maximum value when cycling through the pages of a multipage image in an item.

For more information, refer to Image Viewer Items.

Example

using Leadtools; 
using Leadtools.Controls; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
 
 
public ImageViewerForm _form = new ImageViewerForm(); 
public ImageViewer _imageViewer; 
 
public void ImageViewerPageNumberExample() 
{ 
   // Get the Form's ImageViewer control 
   _imageViewer = _form.ImageViewer; 
 
   if (_imageViewer.Items.Count > 0) 
   { 
      var item = _imageViewer.ActiveItem; 
      var image = item != null ? item.Image : null; 
      var pageCount = (image != null) ? image.PageCount : 1; 
 
      if (pageCount > 1) 
      { 
         var oldPageNumber = item.PageNumber; 
         var newPageNumber = oldPageNumber; 
         newPageNumber++; 
 
         newPageNumber = Math.Max(1, Math.Min(pageCount, newPageNumber)); 
         if (newPageNumber != oldPageNumber) 
         { 
            item.PageNumber = newPageNumber; 
         } 
      } 
      else 
      { 
         var index = _imageViewer.Items.IndexOf(_imageViewer.ActiveItem); 
         index++; 
 
         if (index >= 0 && index < _imageViewer.Items.Count) 
            _imageViewer.ActiveItem = _imageViewer.Items[index]; 
      } 
   } 
}

Requirements

Target Platforms

Reference

ImageViewerItem Class

ImageViewerItem Members

Leadtools.Controls Namespace

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Help Version 23.0.2024.2.29

Leadtools.Controls Assembly

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