ReadComment(Stream,int,RasterCommentMetadataType) Method

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
 
public void CommentsExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_Comments.tif"); 
 
   // Convert the source file to TIF 
   Debug.WriteLine("Converting the source file to TIF"); 
   codecs.Convert(srcFileName, destFileName, RasterImageFormat.Tif, 0, 0, 24, null); 
 
   // Add the artist comment 
   RasterCommentMetadata writeComment = new RasterCommentMetadata(); 
   writeComment.Type = RasterCommentMetadataType.Artist; 
   writeComment.FromAscii("LEADTOOLS"); 
 
   Debug.WriteLine("Writing the following comment:"); 
   Debug.WriteLine(" Type:{0}, Data:{1}", writeComment.Type, writeComment.ToAscii()); 
 
   codecs.WriteComment(destFileName, 1, writeComment); 
 
   // Read the comment back 
   RasterCommentMetadata readComment = codecs.ReadComment(destFileName, 1, RasterCommentMetadataType.Artist); 
   Debug.WriteLine("The following comment has been read:"); 
   Debug.WriteLine(" Type:{0}, Data:{1}", readComment.Type, readComment.ToAscii()); 
 
   // Write a few comments to the file in one pass 
   IList<RasterCommentMetadata> comments = new List<RasterCommentMetadata>(); 
   writeComment = new RasterCommentMetadata(); 
   writeComment.Type = RasterCommentMetadataType.Artist; 
   writeComment.FromAscii("LEADTOOLS Again"); 
   comments.Add(writeComment); 
 
   writeComment = new RasterCommentMetadata(); 
   writeComment.Type = RasterCommentMetadataType.Copyright; 
   writeComment.FromAscii("(c) 2006"); 
   comments.Add(writeComment); 
 
   Debug.WriteLine("Writing the following comments to the file:"); 
   foreach (RasterCommentMetadata comment in comments) 
      Debug.WriteLine(" Type:{0}, Data:{1}", comment.Type, comment.ToAscii()); 
 
   codecs.WriteComments(destFileName, 1, comments); 
 
   // Now get all the comments in the file and show them: 
   Debug.WriteLine("Reading all comments from the file:"); 
 
   RasterCommentMetadataType[] tifComments = 
   { 
   RasterCommentMetadataType.Artist, 
   RasterCommentMetadataType.Copyright, 
   RasterCommentMetadataType.DateTime, 
   RasterCommentMetadataType.Description, 
   RasterCommentMetadataType.HostComputer, 
   RasterCommentMetadataType.Make, 
   RasterCommentMetadataType.Model, 
   RasterCommentMetadataType.NameOfDocument, 
   RasterCommentMetadataType.NameOfPage, 
   RasterCommentMetadataType.Software, 
 }; 
 
   foreach (RasterCommentMetadataType tifComment in tifComments) 
   { 
      RasterCommentMetadata comment = codecs.ReadComment(destFileName, 1, tifComment); 
      if (comment != null) 
      { 
         Console.Write("Found comment, Type:{0}, Data:", comment.Type); 
 
         RasterCommentMetadataDataType dataType = RasterCommentMetadata.GetDataType(comment.Type); 
 
         byte[] byteData; 
         short[] shortData; 
         RasterMetadataRational[] rationalData; 
         RasterMetadataURational[] urationalData; 
 
         switch (dataType) 
         { 
            case RasterCommentMetadataDataType.Ascii: 
               Debug.WriteLine(comment.ToAscii()); 
               break; 
 
            case RasterCommentMetadataDataType.Byte: 
               byteData = comment.ToByte(); 
               for (int i = 0; i < byteData.Length; i++) 
                  Console.Write("{0:X} ", byteData[i]); 
               Debug.WriteLine("  "); 
               break; 
 
            case RasterCommentMetadataDataType.Int16: 
               shortData = comment.ToInt16(); 
               for (int i = 0; i < shortData.Length; i++) 
                  Console.Write("{0:X} ", shortData[i]); 
               Debug.WriteLine("  "); 
               break; 
 
            case RasterCommentMetadataDataType.Rational: 
               rationalData = comment.ToRational(); 
               for (int i = 0; i < rationalData.Length; i++) 
                  Console.Write(@"{0}/{1) ", rationalData[i].Numerator, rationalData[i].Denominator); 
               Debug.WriteLine("  "); 
               break; 
 
            case RasterCommentMetadataDataType.URational: 
               urationalData = comment.ToURational(); 
               for (int i = 0; i < urationalData.Length; i++) 
                  Console.Write(@"{0}/{1) ", urationalData[i].Numerator, urationalData[i].Denominator); 
               Debug.WriteLine("  "); 
               break; 
         } 
      } 
   } 
 
   // Clean up 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}