RasterImage Constructor(SerializationInfo,StreamingContext)

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protected RasterImage( 
   SerializationInfo info,
   StreamingContext context
)

'Declaration

Protected Function New( _
   ByVal info As SerializationInfo, _
   ByVal context As StreamingContext _
)

'Usage

Dim info As SerializationInfo
Dim context As StreamingContext
 
Dim instance As New RasterImage(info, context)

protected RasterImage( 
   SerializationInfo info,
   StreamingContext context
)

function RasterImage( 
   info ,
   context 
)

protected:
RasterImage( 
   SerializationInfo^ info,
   StreamingContext context
)

Parameters

info: The data needed to serialize or deserialize an object.
context: The source and destination of a given serialized stream.

The RasterImage class supports standard .NET serialization. Serialization of a RasterImage is the process of converting the state of a RasterImage object into a form that can be persisted or transported. The complement of serialization is deserialization, which converts a stream into an RasterImage object. Together, these processes allow the image data to be easily stored and transferred.

When you serialize an RasterImage object, all the data inside the object are saved. This includes the image data of all pages as well as the current page number, region information, low bit/high bit, palette data, metadata (tags, markers and comments), etc. In other words, the RasterImage can be constructed back to its original state from the stream.

For more information and examples regarding serialization of an RasterImage object, refer to RasterImage Serialization.

For more information, refer to Grayscale Images.

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

      
  Public Sub MyRasterImageSerializationTest()
   ' Load an image
   Dim codecs As RasterCodecs = New RasterCodecs()
   Dim img As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"))

   ' create a new MyRasterImage instance out of this image
   Dim myImage As MyRasterImage = New MyRasterImage(img)

   ' Set our custom data
   myImage.MyIntegerData = 10
   myImage.MyStringData = "My string"
   Dim msg As String = String.Format("Before serialization.  MyIntegerData = {0}, MyStringData = {1}", myImage.MyIntegerData, myImage.MyStringData)
   MessageBox.Show(msg)

   ' img is invalid now and should be disposed
   img.Dispose()

   ' Serialize myImage
   Dim formatter As BinaryFormatter = New BinaryFormatter()
   Dim ms As MemoryStream = New MemoryStream()
   formatter.Serialize(ms, myImage)

   ' dispose myImage
   myImage.Dispose()
   myImage = Nothing

   ' Deserialize back from the stream
   ms.Position = 0
      myImage = CType(formatter.Deserialize(ms), MyRasterImage)

   msg = String.Format("After serialization.  MyIntegerData = {0}, MyStringData = {1}", myImage.MyIntegerData, myImage.MyStringData)
   MessageBox.Show(msg)

   ' re-save the image
   codecs.Save(myImage, Path.Combine(LEAD_VARS.ImagesDir, "Image1_MySerialized.bmp"), RasterImageFormat.Bmp, 24)

   ' Clean up
   ms.Close()
   myImage.Dispose()
   codecs.Dispose()
End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

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

      
public void MyRasterImageSerializationTest()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   RasterImage img = codecs.Load(Path.Combine(ImagesPath.Path, "Image1.cmp"));
   // create a new MyRasterImage instance out of this image
   MyRasterImage myImage = new MyRasterImage(img);

   // Set our custom data
   myImage.MyIntegerData = 10;
   myImage.MyStringData = "My string";
   string msg = string.Format("Before serialization.  MyIntegerData = {0}, MyStringData = {1}", myImage.MyIntegerData, myImage.MyStringData);
   MessageBox.Show(msg);

   // img is invalid now and should be disposed
   img.Dispose();

   // Serialize myImage
   BinaryFormatter formatter = new BinaryFormatter();
   MemoryStream ms = new MemoryStream();
   formatter.Serialize(ms, myImage);

   // dispose myImage
   myImage.Dispose();
   myImage = null;

   // Deserialize back from the stream
   ms.Position = 0;
   myImage = formatter.Deserialize(ms) as MyRasterImage;

   msg = string.Format("After serialization.  MyIntegerData = {0}, MyStringData = {1}", myImage.MyIntegerData, myImage.MyStringData);
   Console.WriteLine(msg);

   // re-save the image
   codecs.Save(myImage, Path.Combine(ImagesPath.Path, "Image1_MySerialized.bmp"), RasterImageFormat.Bmp, 24);

   // Clean up
   ms.Close();
   ms.Dispose();
   myImage.Dispose();
   codecs.Dispose();
}

Target Platforms

Reference

RasterImage Class
RasterImage Members
Overload List