ReadMarkersAsync Method

C#
Visual Basic
WinRT C#
Java
Objective-C
WinRT JavaScript
C++

public IAsyncOperation<IVector<RasterMarkerMetadata>> ReadMarkersAsync( 
   ILeadStream stream
)

'Declaration

Public Function ReadMarkersAsync( _
   ByVal stream As ILeadStream _
) As IAsyncOperation(Of IVector(Of RasterMarkerMetadata))

'Usage

Dim instance As RasterCodecs
Dim stream As ILeadStream
Dim value As IAsyncOperation(Of IVector(Of RasterMarkerMetadata))
 
value = instance.ReadMarkersAsync(stream)

public IAsyncOperation<IVector<RasterMarkerMetadata>> ReadMarkersAsync( 
   ILeadStream stream
)

 function Leadtools.Codecs.RasterCodecs.ReadMarkersAsync( 
   stream 
)

public:
IAsyncOperation<IVector<RasterMarkerMetadata^>^>^ ReadMarkersAsync( 
   ILeadStream^ stream
)

Parameters

stream: A ILeadStream containing the input file image data.

Return Value

When this method completes, it returns a collection of RasterMarkerMetadata objects containing the metadata marker data.

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.

This example will read all the markers from a stream that contains EXIF file data

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Drawing
Imports Leadtools.Svg

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

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
using Leadtools.Svg;

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();
}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.Examples;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
using Leadtools.Windows.Media;

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);
}

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Windows.Media

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

Target Platforms

Reference

RasterCodecs Class
RasterCodecs Members
Working with Markers