Leadtools.Codecs Send comments on this topic. | Back to Introduction - All Topics | Help Version 15.12.17
GetInformation(Uri,Boolean) Method
See Also  Example
Leadtools.Codecs Namespace > RasterCodecs Class > GetInformation Method : GetInformation(Uri,Boolean) Method




uri
The Uri containing the input image data.
totalPages
true to query the URI for total number of pages, false otherwise.
Gets the specific image page information from the specified Uri.

Syntax

Visual Basic (Declaration) 
Overloads Public Function GetInformation( _
   ByVal uri As Uri, _
   ByVal totalPages As Boolean _
) As CodecsImageInfo
Visual Basic (Usage)Copy Code
Dim instance As RasterCodecs
Dim uri As Uri
Dim totalPages As Boolean
Dim value As CodecsImageInfo
 
value = instance.GetInformation(uri, totalPages)
C# 
public CodecsImageInfo GetInformation( 
   Uri uri,
   bool totalPages
)
Managed Extensions for C++ 
public: CodecsImageInfo* GetInformation( 
   Uri uri,
   bool totalPages
)
C++/CLI 
public:
CodecsImageInfo^ GetInformation( 
   Uri uri,
   bool totalPages
)

Parameters

uri
The 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.

Example

Visual BasicCopy Code
RasterCodecs.GetInformationUri
      Public Sub GetInformationUriExample()
         RasterCodecs.Startup()
         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()
         RasterCodecs.Shutdown()
      End Sub
C#Copy Code
RasterCodecs.GetInformationUri 
      public void GetInformationUriExample() 
      { 
         RasterCodecs.Startup(); 
         RasterCodecs codecs = new RasterCodecs(); 
 
         // Get Information on an image in an HTTP url 
         Uri uri = new Uri(@"http://www.leadtools.com/images/15-homepg-banner.jpg"); 
         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(); 
         RasterCodecs.Shutdown(); 
      }

Remarks

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

LEADTOOLS supports the following URI schemes:
SchemeDescription
UriSchemeFileSpecifies that the URI is a disk file in local machine or universal naming convention (UNC) path.
UriSchemeHttpSpecifies that the URI is accessed through the Hypertext Transfer Protocol (HTTP).
UriSchemeHttpsSpecifies that the URI is accessed through the Secure Hypertext Transfer Protocol (HTTPS).
UriSchemeFtpSpecifies 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.

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also