DeleteComment(Stream,int,RasterCommentMetadataType) Method

Summary

Deletes a comment field from a file.

Syntax

C++/CLI

Python

public void DeleteComment( 
   Stream stream, 
   int pageNumber, 
   RasterCommentMetadataType type 
)

public: 
void DeleteComment(  
   Stream^ stream, 
   int pageNumber, 
   RasterCommentMetadataType type 
)

def DeleteComment(self,stream,pageNumber,type):

Parameters

stream
A Stream containing the input file data.

pageNumber
1-based index of the page from which to read the comment.

type
The type of comment. Refer to Types of File Comments.

Remarks

This function only applies to TIF, EXIF, JPEG, JPEG 2000, and PNG files.

You can use CommentsSupported to determine whether a certain file format supports comments.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
 
public void DeleteCommentExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg"); 
 
   RasterCommentMetadataType commentType = RasterCommentMetadataType.IptcKeywords; 
   RasterCommentMetadata comment = codecs.ReadComment(srcFileName, 1, commentType); 
   if (comment == null) 
      Debug.WriteLine("comment is missing!"); 
   else 
   { 
      codecs.DeleteComment(srcFileName, 1, commentType); 
 
      comment = codecs.ReadComment(srcFileName, 1, commentType); 
      if (comment != null) 
         Debug.WriteLine("comment is still there!"); 
   } 
 
   // Clean up 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.*; 
import java.net.*; 
import java.nio.file.Paths; 
import java.util.*; 
import java.time.Instant; 
import java.time.Duration; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.codecs.RasterCodecs.FeedCallbackThunk; 
import leadtools.drawing.internal.*; 
import leadtools.imageprocessing.*; 
import leadtools.imageprocessing.color.ChangeIntensityCommand; 
import leadtools.svg.*; 
 
 
public void deleteCommentExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "cannon.jpg"); 
 
   RasterCommentMetadataType commentType = RasterCommentMetadataType.IPTC_KEYWORDS; 
   RasterCommentMetadata comment = codecs.readComment(srcFileName, 1, 
         commentType); 
   codecs.deleteComment(srcFileName, 1, commentType); 
 
   comment = codecs.readComment(srcFileName, 1, commentType); 
   assertTrue("Comment was not deleted as expected", comment == null); 
 
   // Clean up 
   codecs.dispose(); 
}

Requirements

Target Platforms

Reference

RasterCodecs Class

RasterCodecs Members

Overload List

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Help Version 23.0.2024.2.29

Leadtools.Codecs Assembly

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