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Tag Property

Summary

Optional user defined data associated with this item.

Syntax
C#
C++
public object Tag { get; set; } 
vb[VB Syntax] 
Public Property Tag() As Object 
   Get 
   Set 
public: 
   property Object^ Tag 
   { 
      Object^ get() 
      void set(Object^ value) 
   } 

Property Value

The optional user defined data associated with this item. Default value is null.

Remarks

This value is not used by LEADTOOLS. You can set any value here for the purpose of your application.

For more information, refer Image Viewer Items.

Example
C#
using Leadtools; 
using Leadtools.Controls; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
 
 
public void ImageViewerItems_Example() 
{ 
 
   // Clear all the images already the viewer 
   _imageViewer.Items.Clear(); 
   // Use vertical view layout 
   _imageViewer.ViewLayout = new ImageViewerVerticalViewLayout(); 
   _imageViewer.ImageBorderThickness = 1; 
 
   // Add 4 items to the viewer 
   using (var codecs = new RasterCodecs()) 
   { 
      for (var page = 1; page <= 4; page++) 
      { 
         var item = new ImageViewerItem(); 
         var fileName = Path.Combine(LEAD_VARS.ImagesDir, string.Format("ocr{0}.tif", page)); 
         item.Image = codecs.Load(fileName, 100, 100, 24, RasterSizeFlags.Resample, CodecsLoadByteOrder.BgrOrGray, page, page); 
         // Set the tag of each item to be the page number 
         item.Tag = page; 
         _imageViewer.Items.Add(item); 
      } 
   } 
 
   // Show the count 
   MessageBox.Show("This must say 4: " + _imageViewer.Items.Count); 
 
   // Remove the item at index 1 (page 2) 
   _imageViewer.Items.RemoveAt(1); 
   MessageBox.Show("This must now say 3: " + _imageViewer.Items.Count); 
 
   // Loop through each item and show the tag, since we remove page 2, it must say 1, 3, 4 
   foreach (var item in _imageViewer.Items) 
   { 
      var pageNumber = (int)item.Tag; 
      MessageBox.Show(pageNumber.ToString()); 
   } 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
} 
Requirements

Target Platforms

Help Version 22.0.2022.4.4
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© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Controls Assembly

Products | Support | Contact Us | Intellectual Property Notices
© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.