TagFound Event

Summary

Occurs during the TIFF tag enumerated by the EnumTags method.

Syntax

C++/CLI

Java

Python

public event EventHandler<CodecsEnumTagsEventArgs> TagFound

synchronized public void addTagFoundListener(CodecsTagFoundListener listener) 
synchronized public void removeTagFoundListener(CodecsTagFoundListener listener)

public: 
event EventHandler<CodecsEnumTagsEventArgs^>^ TagFound

def TagFound(sender,e): # sender: RasterCodecs e: CodecsEnumTagsEventArgs

Event Data

The event handler receives an argument of type CodecsEnumTagsEventArgs containing data related to this event. The following CodecsEnumTagsEventArgs properties provide information specific to this event.

Property	Description
Cancel	A value which allows the user to abort the enumeration process.

Remarks

This event will fire for each tag found in the file as a result of calling EnumTags.

Do not attempt to use DeleteTag to delete tags from inside this event. If you want to delete tags that you enumerate, use this event to add the tags to a list. Upon returning from EnumTags, you can delete all the tags from the list.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
string tagsFileName; 
IList<RasterTagMetadata> myTags; 
 
void EnumTagsExample(string srcFileName, string destFileName) 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   tagsFileName = srcFileName; 
   myTags = new List<RasterTagMetadata>(); 
 
   codecs.TagFound += new EventHandler<CodecsEnumTagsEventArgs>(codecs_TagFound); 
   codecs.EnumTags(srcFileName, 1); 
   codecs.TagFound -= new EventHandler<CodecsEnumTagsEventArgs>(codecs_TagFound); 
 
   // We read all the tags now, save them to the file 
   Debug.WriteLine("{0} tags read, saving them to the destination file", myTags.Count); 
   codecs.WriteTags(destFileName, 1, myTags); 
 
   // Clean up 
   codecs.Dispose(); 
} 
 
void codecs_TagFound(object sender, CodecsEnumTagsEventArgs e) 
{ 
   Debug.WriteLine("Tag: Id={0}, Count={1}, Type={2}, Cancel={3}", e.Id, e.Count, e.MetadataType, e.Cancel); 
 
   // Read this tag from the file and add it to our collection 
   RasterCodecs codecs = sender as RasterCodecs; 
   RasterTagMetadata tag = codecs.ReadTag(tagsFileName, 1, e.Id); 
   myTags.Add(tag); 
}

Requirements

Target Platforms

Reference

RasterCodecs Class

RasterCodecs Members

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Help Version 22.0.2023.5.5

Leadtools.Codecs Assembly

Introduction

Getting Started

Namespaces

Leadtools.Codecs Namespace

Assemblies