CodecsGetInformationAsyncCompletedEventArgs Constructor

Summary

Creates a new instance of the CodecsGetInformationAsyncCompletedEventArgs with the specified parameters.

Syntax

C++/CLI

Java

Python

public CodecsGetInformationAsyncCompletedEventArgs( 
   CodecsImageInfo info, 
   Uri uri, 
   Stream stream, 
   string fileName, 
   Exception error, 
   bool cancelled, 
   object userState 
)

public CodecsGetInformationAsyncCompletedEvent(Object source, CodecsImageInfo info, ILeadStream stream, RuntimeException error, boolean cancelled, Object userState)

public: 
CodecsGetInformationAsyncCompletedEventArgs(  
   CodecsImageInfo^ info, 
   Uri^ uri, 
   Stream^ stream, 
   String^ fileName, 
   Exception^ error, 
   bool cancelled, 
   Object^ userState 
)

__init__(self,info,uri,stream,fileName,error,cancelled,userState) # Overloaded constructor

Parameters

info
The CodecsImageInfo object instance being used.

uri
The Uri this asynchronous operation is using.

stream
The Stream this asynchronous operation is using.

fileName
The file name this asynchronous operation is using.

error
Any error that occurred during the asynchronous operation.

cancelled
A value indicating whether the asynchronous operation was canceled.

userState
The optional user-supplied state object passed to the RasterCodecs.GetInformationAsync,

RasterCodecs.LoadAsync or RasterCodecs.SaveAsync method that initialized the construction of this object.

Remarks

NOTE: This topic is part of RasterCodecs Async support using the .NET System.ComponentMode.AsyncOperation model. For .NET async/await support this type/member is not used. Instead, refer to RasterCodecs Async Operations.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
public void GetInformationAsyncCompletedExample() 
{ 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   Uri uri = new Uri(srcFileName); 
 
   RasterCodecs codecs = new RasterCodecs(); 
 
   // Now get information about the file asynchronously 
   codecs.GetInformationAsyncCompleted += new EventHandler<CodecsGetInformationAsyncCompletedEventArgs>(GetInformationAsyncCompletedExample_GetInformationAsyncCompleted); 
   object imageInfoObject = codecs.GetInformationAsync(uri, true, 1, null); 
 
   // Notice that the returned imageInfoObject is a CodecsImageInfo with IsLoading set to true at this point 
   // The IsLoading will be false (and hence, the object will be usable) when the GetInformationAsyncCompleted 
   // fires. 
} 
 
private void GetInformationAsyncCompletedExample_GetInformationAsyncCompleted(object sender, CodecsGetInformationAsyncCompletedEventArgs e) 
{ 
   if (e.Cancelled) 
   { 
      Debug.WriteLine("User canceled"); 
   } 
   else if (e.Error != null) 
   { 
      Debug.WriteLine("Error: " + e.Error.Message); 
   } 
   else 
   { 
      // Get the image info 
      CodecsImageInfo info = e.Info; 
      Debug.WriteLine("Image info obtainted asynchronously:\n{0}", info.ToString()); 
      info.Dispose(); 
   } 
 
   // Unsubscribe to the event and dispose the RasterCodecs object 
   RasterCodecs codecs = sender as RasterCodecs; 
   codecs.GetInformationAsyncCompleted -= new EventHandler<CodecsGetInformationAsyncCompletedEventArgs>(GetInformationAsyncCompletedExample_GetInformationAsyncCompleted); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.*; 
import java.net.*; 
import java.nio.file.Paths; 
import java.util.*; 
import java.time.Instant; 
import java.time.Duration; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.codecs.RasterCodecs.FeedCallbackThunk; 
import leadtools.drawing.internal.*; 
import leadtools.imageprocessing.*; 
import leadtools.imageprocessing.color.ChangeIntensityCommand; 
import leadtools.svg.*; 
 
 
public void getInformationAsyncCompletedExample() throws URISyntaxException, IOException { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp"); 
   URI uri = Paths.get(srcFileName).toUri(); 
 
   RasterCodecs codecs = new RasterCodecs(); 
 
   // Now get information about the file asynchronously 
   codecs.addGetInformationAsyncCompletedListener(getInformationAsyncCompletedExampleGetInformationAsyncCompleted); 
   ILeadStream uriStream = LeadStreamFactory.create(uri); 
   codecs.getInformationAsync(uriStream, true, 1, null); 
 
   assertTrue("Check that URI exists", uri != null); 
   System.out.println("The URI exists"); 
 
   uriStream.close(); 
} 
 
CodecsGetInformationAsyncCompletedListener getInformationAsyncCompletedExampleGetInformationAsyncCompleted = new CodecsGetInformationAsyncCompletedListener() { 
 
   @Override 
   public void onGetInformationAsyncCompleted(CodecsGetInformationAsyncCompletedEvent e) { 
      if (e.getCancelled()) { 
         System.out.println("User canceled"); 
      } else if (e.getError() != null) { 
         System.out.println("Error: " + e.getError().getMessage()); 
      } else { 
         // Get the image info 
         CodecsImageInfo info = e.getInfo(); 
         System.out.println("Image info obtainted asynchronously:\n" + info.toString()); 
      } 
 
      // Unsubscribe to the event and dispose the RasterCodecs object 
      RasterCodecs codecs = (RasterCodecs) e.getSource(); 
      codecs.removeGetInformationAsyncCompletedListener( 
            getInformationAsyncCompletedExampleGetInformationAsyncCompleted); 
      codecs.dispose(); 
   } 
 
};

Requirements

Target Platforms

Reference

CodecsGetInformationAsyncCompletedEventArgs Class

CodecsGetInformationAsyncCompletedEventArgs Members

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