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GetInformation(Stream,Boolean) Method
See Also  Example
Leadtools.Codecs Namespace > RasterCodecs Class > GetInformation Method : GetInformation(Stream,Boolean) Method




stream
Stream containing the input image data.
totalPages
true to query the file for total number of pages, false otherwise.
Gets the image information from a stream.

Syntax

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

Parameters

stream
Stream containing the input image data.
totalPages
true to query the file 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.GetInformationStream
      Public Sub GetInformationStreamExample()
         RasterCodecs.Startup()
         Dim codecs As RasterCodecs = New RasterCodecs()

         ' Get Information on a GIF image file and write it out
         Dim srcFileName As String = "C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\eye.gif"
         Dim fileInMemory As FileStream = New FileStream(srcFileName, FileMode.Open)

         Dim info As CodecsImageInfo = codecs.GetInformation(fileInMemory, True)
         Console.WriteLine("Information for: {0}", srcFileName)
         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("Fax: {0}", info.Fax))
         Console.WriteLine(String.Format("Format: {0}", info.Format))
         If info.Gif.HasAnimationBackground Then
            Console.WriteLine(String.Format("Gif.AnimationBackground: {0}", info.Gif.AnimationBackground.ToString()))
         End If
         Console.WriteLine(String.Format("Gif.AnimationHeight: {0}", info.Gif.AnimationHeight))
         Console.WriteLine(String.Format("Gif.AnimationWidth: {0}", info.Gif.AnimationWidth))
         If info.Gif.HasAnimationLoop Then
            Console.WriteLine(String.Format("Gif.AnimationLoop: {0}", info.Gif.AnimationLoop.ToString()))
         End If
         If info.Gif.HasAnimationPalette Then
            Dim pal As RasterColor() = info.Gif.GetAnimationPalette()
            Console.WriteLine("GifAnimationPalette:" & Constants.vbLf)
            Dim x As Integer = 0
            Do While x < pal.Length
               Console.Write("{0},", pal(x))
               x += 1
            Loop
            Console.WriteLine(Constants.vbLf)
         End If
         Console.WriteLine(String.Format("Gif.IsInterlaced: {0}", info.Gif.IsInterlaced.ToString()))
         Console.WriteLine(String.Format("PageNumber: {0}", info.PageNumber))
         Console.WriteLine(String.Format("TotalPages: {0}", info.TotalPages))

         ' Clean up
         codecs.Dispose()
         fileInMemory.Close()
         fileInMemory.Dispose()
         RasterCodecs.Shutdown()
      End Sub
C#Copy Code
RasterCodecs.GetInformationStream 
      public void GetInformationStreamExample() 
      { 
         RasterCodecs.Startup(); 
         RasterCodecs codecs = new RasterCodecs(); 
 
         // Get Information on a GIF image file and write it out 
         string srcFileName = @"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\eye.gif"; 
         FileStream fileInMemory = new FileStream(srcFileName, FileMode.Open); 
 
         CodecsImageInfo info = codecs.GetInformation(fileInMemory, true); 
         Console.WriteLine("Information for: {0}", srcFileName); 
         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("Fax: {0}", info.Fax)); 
         Console.WriteLine(string.Format("Format: {0}", info.Format)); 
         if(info.Gif.HasAnimationBackground) 
            Console.WriteLine(string.Format("Gif.AnimationBackground: {0}", info.Gif.AnimationBackground.ToString())); 
         Console.WriteLine(string.Format("Gif.AnimationHeight: {0}", info.Gif.AnimationHeight)); 
         Console.WriteLine(string.Format("Gif.AnimationWidth: {0}", info.Gif.AnimationWidth)); 
         if(info.Gif.HasAnimationLoop) 
            Console.WriteLine(string.Format("Gif.AnimationLoop: {0}", info.Gif.AnimationLoop.ToString())); 
         if(info.Gif.HasAnimationPalette) 
         { 
            RasterColor[] pal = info.Gif.GetAnimationPalette(); 
            Console.WriteLine("GifAnimationPalette:\n"); 
            for(int x = 0; x < pal.Length; x++) 
            { 
               Console.Write("{0},", pal[x]); 
            } 
            Console.WriteLine("\n"); 
         } 
         Console.WriteLine(string.Format("Gif.IsInterlaced: {0}", info.Gif.IsInterlaced.ToString())); 
         Console.WriteLine(string.Format("PageNumber: {0}", info.PageNumber)); 
         Console.WriteLine(string.Format("TotalPages: {0}", info.TotalPages)); 
 
         // Clean up 
         codecs.Dispose(); 
         fileInMemory.Close(); 
         fileInMemory.Dispose(); 
         RasterCodecs.Shutdown(); 
      }

Remarks

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

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