ReadMarkers(String) Method

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

public RasterCollection<RasterMarkerMetadata> ReadMarkers( 
   string fileName
)

'Declaration

Public Overloads Function ReadMarkers( _
   ByVal fileName As String _
) As RasterCollection(Of RasterMarkerMetadata)

'Usage

Dim instance As RasterCodecs
Dim fileName As String
Dim value As RasterCollection(Of RasterMarkerMetadata)
 
value = instance.ReadMarkers(fileName)

public RasterCollection<RasterMarkerMetadata> ReadMarkers( 
   string fileName
)

- (nullable NSArray<LTRasterMarkerMetadata *> *)readMarkersFromFile:(NSString *)file error:(NSError **)error

 function Leadtools.Codecs.RasterCodecs.ReadMarkers(String)( 
   fileName 
)

public:
RasterCollection<RasterMarkerMetadata^>^ ReadMarkers( 
   String^ fileName
)

Parameters

fileName: A String containing the input file name.

Return Value

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 an EXIF file

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 ReadMarkersFromFileExample(ByVal exifFileName As String)
   Dim codecs As RasterCodecs = New RasterCodecs()
   Dim markers As RasterCollection(Of RasterMarkerMetadata) = codecs.ReadMarkers(exifFileName)
   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 ReadMarkersFromFileExample(string exifFileName)
{
   RasterCodecs codecs = new RasterCodecs();
   RasterCollection<RasterMarkerMetadata> markers = codecs.ReadMarkers(exifFileName);
   Console.WriteLine("{0} markers found with the following ID's:", markers.Count);
   foreach (RasterMarkerMetadata marker in markers)
      Console.WriteLine(marker.Id);

   codecs.Dispose();
}

RasterCodecsExamples.prototype.ReadMarkersFileExample = function () {
   Tools.SetLicense();
   with (Leadtools) {
      with (Leadtools.Codecs) {

         var exifFileName = "Assets\\WithAudio.jpg";
         var codecs = new RasterCodecs();

         return Tools.AppInstallFolder().getFileAsync(exifFileName).then(function (loadFile) {

            return codecs.readMarkersAsync(LeadStreamFactory.create(loadFile))
         })
            .then(function (markers) {
               console.info(markers.length, " markers found with the following ID's:");
               for (var i =0; i < markers.length; i++ )
                  console.info(markers[i].id);

               codecs.close();
            });
      }
   }
}

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

async Task ReadMarkersFromFileExample(string exifFileName)
{
   RasterCodecs codecs = new RasterCodecs();
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(exifFileName);
   IList<RasterMarkerMetadata> markers = await codecs.ReadMarkersAsync(LeadStreamFactory.Create(loadFile));
   Debug.WriteLine("{0} markers found with the following ID's:", markers.Count);
   foreach (RasterMarkerMetadata marker in markers)
      Debug.WriteLine(marker.Id);

   codecs.Dispose();
}

Target Platforms

Reference

RasterCodecs Class
RasterCodecs Members
Overload List
Working with Markers