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

ReadMarkers(Stream) Method

Example 





A System.IO.Stream containing the input file image data.
Reads all the metadata markers (COM and APPn) from a stream. .NET support Silverlight support
Syntax
'Declaration
 
Public Overloads Function ReadMarkers( _
   ByVal stream As Stream _
) As RasterCollection(Of RasterMarkerMetadata)
'Usage
 
Dim instance As RasterCodecs
Dim stream As Stream
Dim value As RasterCollection(Of RasterMarkerMetadata)
 
value = instance.ReadMarkers(stream)
 function Leadtools.Codecs.RasterCodecs.ReadMarkers(Stream)( 
   stream 
)

Parameters

stream
A System.IO.Stream containing the input file image data.

Return Value

A collection of Leadtools.RasterMarkerMetadata objects containing the metadata marker data.
Remarks

This method reads all the metadata markers from a file, and returns a collection of the markers.

For Exif files, this metadata collection will contain all the Exif and GPS comments, stored in APP1. It will also contain the audio information stored in APP2.

If the file contains no marker, then this method will return an empty collection.

Example
 
Private Sub ReadMarkersFromStreamExample(ByVal theStream As Stream)
   Dim codecs As RasterCodecs = New RasterCodecs()
   Dim markers As RasterCollection(Of RasterMarkerMetadata) = codecs.ReadMarkers(theStream)
   Console.WriteLine("{0} markers found with the following ID's:", markers.Count)
   For Each marker As RasterMarkerMetadata In markers
      Console.WriteLine(marker.Id)
   Next marker

   codecs.Dispose()
End Sub
void ReadMarkersFromStreamExample(Stream theStream)
{
    RasterCodecs codecs = new RasterCodecs();
    RasterCollection<RasterMarkerMetadata> markers = codecs.ReadMarkers(theStream);
    Console.WriteLine("{0} markers found with the following ID's:", markers.Count);
    foreach (RasterMarkerMetadata marker in markers)
        Console.WriteLine(marker.Id);

    codecs.Dispose();
}
public void ReadMarkersFromStreamExample(Stream inStreamExif)
{
   RasterCodecs codecs = new RasterCodecs();
   RasterCollection<RasterMarkerMetadata> markers = codecs.ReadMarkers(inStreamExif);
   Debug.WriteLine("{0} markers found with the following ID's:", markers.Count);
   foreach(RasterMarkerMetadata marker in markers)
      Debug.WriteLine(marker.Id);
}
Public Sub ReadMarkersFromStreamExample(ByVal inStreamExif As Stream)
   Dim codecs As RasterCodecs = New RasterCodecs()
   Dim markers As RasterCollection(Of RasterMarkerMetadata) = codecs.ReadMarkers(inStreamExif)
   Debug.WriteLine("{0} markers found with the following ID's:", markers.Count)
   For Each marker As RasterMarkerMetadata In markers
      Debug.WriteLine(marker.Id)
   Next marker
End Sub
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
Working with Markers

 

 


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