Load(String) Method

C#
Visual Basic
WinRT C#
Java
Objective-C
WinRT JavaScript
C++

public RasterImage Load( 
   string fileName
)

'Declaration

Public Overloads Function Load( _
   ByVal fileName As String _
) As RasterImage

'Usage

Dim instance As RasterCodecs
Dim fileName As String
Dim value As RasterImage
 
value = instance.Load(fileName)

public RasterImage Load( 
   string fileName
)

- (nullable LTRasterImage *)loadFile:(NSString *)file 
                               error:(NSError **)error

 function Leadtools.Codecs.RasterCodecs.Load(String)( 
   fileName 
)

public:
RasterImage^ Load( 
   String^ fileName
)

Parameters

fileName: A String containing the name of the image file to load.

Return Value

The RasterImage object that this method loads.

The file can be in any supported image file format and bits per pixel, whether compressed or uncompressed.

This method can load all the pages in a multi-page file. For more information, refer to the last remark. The resulting image will have the same bits/pixel and color order value of the image as it was stored in the file.

LEADTOOLS will attempt to load corrupted files so you can see at least a portion of the image. For these images, the load methods succeed, but LoadStatus will return an error code.

Use the CodecsLoadOptions class to set up other load option parameters before calling this method.

Support for 12 and 16-bit grayscale, and 48 and 64-bit color images is only available in the Document/Medical Imaging editions.

For supported formats, refer to Summary of All Supported Image File Formats.

LEADTOOLS loads all PDF files as Raster PDF uncompressed RasterImageFormat.RasPdf, regardless of the compression and color space used when saving the file.

The CodecsLoadOptions.AllPages property controls whether RasterCodecs will try to load all pages or just the first page if the image data contains multiple pages. To load a single page from a file, use Load(string fileName, int pageNumber).

This example will load all the pages from a single multi-page file

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
Imports Leadtools.Svg

      
Public Sub LoadFile1Example()
   Dim codecs As RasterCodecs = New RasterCodecs()
   Dim singlePageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")
   Dim multiPageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Eye.gif")

   ' Get the file information (we are interested in the number of pages)
   Dim info As CodecsImageInfo = codecs.GetInformation(singlePageFileName, True)
   Console.WriteLine("Number of pages according to info: {0}", info.TotalPages)

   ' Load the image and verify that we loaded all the pages
   Dim image As RasterImage = codecs.Load(singlePageFileName)
   Console.WriteLine("Number of pages loaded: {0}", image.PageCount)
   Debug.Assert(image.PageCount = info.TotalPages)
   image.Dispose()

   ' Repeat for a multipage file

   info = codecs.GetInformation(multiPageFileName, True)
   Console.WriteLine("Number of pages according to info: {0}", info.TotalPages)

   image = codecs.Load(multiPageFileName)
   Console.WriteLine("Number of pages loaded: {0}", image.PageCount)
   Debug.Assert(image.PageCount = info.TotalPages)
   image.Dispose()

   ' Clean up
   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;
using Leadtools.Svg;

      
public void LoadFile1Example()
{
   RasterCodecs codecs = new RasterCodecs();
   codecs.Options.Load.AllPages = true;
   string singlePageFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
   string multiPageFileName = Path.Combine(LEAD_VARS.ImagesDir, "Eye.gif");
   // Get the file information (we are interested in the number of pages)
   CodecsImageInfo info = codecs.GetInformation(singlePageFileName, true);
   Console.WriteLine("Number of pages according to info: {0}", info.TotalPages);

   // Load the image and verify that we loaded all the pages
   RasterImage image = codecs.Load(singlePageFileName);
   Console.WriteLine("Number of pages loaded: {0}", image.PageCount);
   Debug.Assert(image.PageCount == info.TotalPages);
   image.Dispose();

   // Repeat for a multipage file

   info = codecs.GetInformation(multiPageFileName, true);
   Console.WriteLine("Number of pages according to info: {0}", info.TotalPages);

   image = codecs.Load(multiPageFileName);
   Console.WriteLine("Number of pages loaded: {0}", image.PageCount);
   Debug.Assert(image.PageCount == info.TotalPages);
   image.Dispose();

   // Clean up
   codecs.Dispose();
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

Target Platforms

Reference

RasterCodecs Class
RasterCodecs Members
Overload List
Loading and Saving Images
Loading and Saving Large TIFF / BigTIFF Files
Speeding Up 1-Bit Documents
Fast File Info