GetInformation(Uri,Boolean) Method

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public CodecsImageInfo GetInformation( 
   Uri uri,
   bool totalPages
)

'Declaration
 
Public Overloads Function GetInformation( _
   ByVal uri As Uri, _
   ByVal totalPages As Boolean _
) As CodecsImageInfo

'Usage
 
Dim instance As RasterCodecs
Dim uri As Uri
Dim totalPages As Boolean
Dim value As CodecsImageInfo
 
value = instance.GetInformation(uri, totalPages)

public CodecsImageInfo GetInformation( 
   Uri uri,
   bool totalPages
)

 function Leadtools.Codecs.RasterCodecs.GetInformation(Uri,Boolean)( 
   uri ,
   totalPages 
)

public:
CodecsImageInfo^ GetInformation( 
   Uri^ uri,
   bool totalPages
)

Parameters

uri: The System.Uri containing the input image data.
totalPages: true to query the URI for total number of pages; false, otherwise.

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

If uri points to a resource in a System.Uri.UriSchemeHttp, System.Uri.UriSchemeHttps or System.Uri.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(String) or GetTotalPagesAsync.

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

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

Public Sub GetInformationUriExample()
   Dim codecs As New RasterCodecs()

   ' Get Information on an image in an HTTP url
   Dim uri As New Uri("http://www.leadtools.com/images/15-homepg-banner.jpg")
   Dim info As CodecsImageInfo = codecs.GetInformation(uri, True)

   Console.WriteLine("Information for: {0}", uri)
   Console.WriteLine(String.Format("BitsPerPixel: {0}", info.BitsPerPixel))
   Console.WriteLine(String.Format("BytesPerLine: {0}", info.BytesPerLine))
   Console.WriteLine(String.Format("ColorSpace: {0}", info.ColorSpace.ToString()))
   Console.WriteLine(String.Format("Compresion: {0}", info.Compression))
   Console.WriteLine(String.Format("Format: {0}", info.Format))

   ' Clean up
   codecs.Dispose()
End Sub

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

public void GetInformationUriExample()
{
   RasterCodecs codecs = new RasterCodecs();

   // Get Information on an image in an HTTP url
   Uri uri = new Uri(@"http://www.leadtools.com/images/page_graphics/leadlogo.png");
   CodecsImageInfo info = codecs.GetInformation(uri, true);

   Console.WriteLine("Information for: {0}", uri);
   Console.WriteLine(string.Format("BitsPerPixel: {0}", info.BitsPerPixel));
   Console.WriteLine(string.Format("BytesPerLine: {0}", info.BytesPerLine));
   Console.WriteLine(string.Format("ColorSpace: {0}", info.ColorSpace.ToString()));
   Console.WriteLine(string.Format("Compresion: {0}", info.Compression));
   Console.WriteLine(string.Format("Format: {0}", info.Format));

   // Clean up
   codecs.Dispose();
}

Target Platforms

Reference

RasterCodecs Class
RasterCodecs Members
Overload List
Loading and Saving Large Tiff Files
Speeding Up 1-Bit Documents
Fast File Info