LEADTOOLS Image File Support (Leadtools.Codecs assembly)
LEAD Technologies, Inc

ReadComments(String,Int32) Method






A System.String containing the input file name.
1-based index of the page from which to read the comments.
Gets all the comment fields stored in a file. .NET support Silverlight support
Syntax
'Declaration
 
Public Overloads Function ReadComments( _
   ByVal fileName As String, _
   ByVal pageNumber As Integer _
) As RasterCollection(Of RasterCommentMetadata)
'Usage
 
Dim instance As RasterCodecs
Dim fileName As String
Dim pageNumber As Integer
Dim value As RasterCollection(Of RasterCommentMetadata)
 
value = instance.ReadComments(fileName, pageNumber)
 function Leadtools.Codecs.RasterCodecs.ReadComments(String,Int32)( 
   fileName ,
   pageNumber 
)

Parameters

fileName
A System.String containing the input file name.
pageNumber
1-based index of the page from which to read the comments.

Return Value

A collection of Leadtools.RasterTagMetadata containing all the comment fields information found in the file. If the file does not contain any comments, an empty collection will be returned. If the file format does not support comment fields, an exception will be thrown.
Remarks

Some file formats can contain comments, and some cannot, and each file format has its own set of comment types. When you save a file, the comments in the Leadtools.RasterImage object can be saved in the file. The index into the array (specified using a constant) determines the type of comment.

To read a specific comment field stored in a file, use ReadComment(String,Int32,RasterCommentMetadataType).

This method will throw an exception if the file format does not support comments fields. To determine whether a file format supports comment fields, use CommentsSupported. You can also automatically load all the comment fields stored in a file during a load operation by setting the CodecsLoadOptions.Comments property to true. The comment fields data will be stored in the resulting image RasterImage.Comments collection.

To load all the comments stored in a stream, use ReadComments(Stream,Int32).

Example
For an example, refer to ReadTags(String,Int32).
Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also

Reference

RasterCodecs Class
RasterCodecs Members
Overload List
CommentsSupported Method
ReadComment(String,Int32,RasterCommentMetadataType) Method
TagsSupported Method
GeoKeysSupported Method
Comments Property
RasterImage.Comments
Working with Markers
Implementing TIFF Comments and Tags
TIFF File Comments
Implementing GeoKeys (GeoTIFF tags)
Leadtools.RasterCommentMetadataType

 

 


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