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GetInformation(Uri,bool,int) Method

Gets the specific image page information from the specified Uri.
public CodecsImageInfo GetInformation( 
   Uri uri, 
   bool totalPages, 
   int pageNumber 
CodecsImageInfo^ GetInformation(  
   Uri^ uri, 
   bool totalPages, 
   int pageNumber 
def GetInformation(self,uri,totalPages,pageNumber): 


The Uri containing the input image data.

true to query the URI for total number of pages; false, otherwise.

Page number in the URI to query.

Return Value

A CodecsImageInfo object that contains the information about the specified image.


Specifying true for  totalPages can cause the process to be slow for files with large number of pages.

LEADTOOLS supports the following URI schemes:

Scheme Description
UriSchemeFile Specifies that the URI is a disk file in local machine or universal naming convention (UNC) path.
UriSchemeHttp Specifies that the URI is accessed through the Hypertext Transfer Protocol (HTTP).
UriSchemeHttps Specifies that the URI is accessed through the Secure Hypertext Transfer Protocol (HTTPS).
UriSchemeFtp Specifies that the URI is accessed through the File Transfer Protocol (FTP).

If  uri points to a resource in a UriSchemeHttp, UriSchemeHttps or UriSchemeFtp, then this RasterCodecs will attempt to download image data in an iterative fashion by creating a temporary buffer. The size of this buffer can be determined and changed by setting up the UriOperationBufferSize prior to calling this method.

For authenticity and proxy settings, refer to UriOperationCredentials and UriOperationProxy.

To quickly query the number of an image, use GetTotalPages or GetTotalPagesAsync.

To quickly query the format of an image, use GetFormat or GetFormatAsync.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
public void GetInformationUriExample() 
   RasterCodecs codecs = new RasterCodecs(); 
   // Get Information on an image in an HTTP url 
   Uri uri = new Uri(@"https://www.leadtools.com/images/page_graphics/leadlogo.png"); 
   CodecsImageInfo info = codecs.GetInformation(uri, true); 
   Debug.WriteLine("Information for: {0}", uri); 
   Debug.WriteLine("BitsPerPixel: {0}", info.BitsPerPixel); 
   Debug.WriteLine("BytesPerLine: {0}", info.BytesPerLine); 
   Debug.WriteLine("ColorSpace: {0}", info.ColorSpace.ToString()); 
   Debug.WriteLine("Compression: {0}", info.Compression); 
   Debug.WriteLine("Format: {0}", info.Format); 
   // Clean up 
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 getInformationUriExample() throws URISyntaxException { 
   RasterCodecs codecs = new RasterCodecs(); 
   // Get Information on an image in an HTTP url 
   URI uri = new URI("https://www.leadtools.com/images/page_graphics/leadlogo.png"); 
   ILeadStream uriStream = LeadStreamFactory.create(uri); 
   CodecsImageInfo info = codecs.getInformation(uriStream, true); 
   System.out.println("Information for: " + uri); 
   System.out.println("BitsPerPixel: " + info.getBitsPerPixel()); 
   System.out.println("BytesPerLine: " + info.getBytesPerLine()); 
   System.out.println("ColorSpace: " + info.getColorSpace().toString()); 
   System.out.println("Compression: " + info.getCompression()); 
   System.out.println("Format: " + info.getFormat()); 
   assertTrue("info has incorrect format", info.getFormat().equals(RasterImageFormat.PNG)); 
   // Clean up 

Target Platforms

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Leadtools.Codecs Assembly

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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.