Splitting a Multipage TIFF File Tutorial

Take the following steps to start a project:

Start Visual Studio.
Choose File -> New -> Project... from the menu.
In the New Project dialog box, choose either Visual C# Projects or VB Projects in the Projects Type list. Then, choose Windows Forms Application in the templates list.
Name the project "Split Multipage TIFF Files" If desired, provide a new location for your project. Click OK.
In the Solution Explorer panel, right-click on the References node and select Add Reference... from the context menu. In the Add Reference dialog box, browse to the "C:\LEADTOOLS 20\Bin\DotNet4\Win32" folder and select the following DLLs:
- Leadtools.dll
- Leadtools.Codecs.dll
- Leadtools.Codecs.Fax.dll
- Leadtools.Codecs.Tif.dll
Click the Select button and then press the OK button to add the above DLLs to the application.
Drag and drop a Button from the Toolbox onto the Form1 UI designer. Change the following properties:

Text Name

Split TIFF buttonSplit

Text	Name
Split TIFF	buttonSplit

Switch to the code view of Form1 (right-click Form1 in the Solution Explorer and select View Code) and add the following lines at the beginning of the file:

Imports System.IO 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing

using System.IO; 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing;

Add the following initialization code to the Form1 class

Protected Overrides Sub OnLoad(ByVal e As EventArgs) 
   ' Requires a license file that unlocks 1D barcode read functionality. 
   Dim MY_LICENSE_FILE As String = "C:\LEADTOOLS 20\Support\Common\License\leadtools.lic" 
   Dim MY_DEVELOPER_KEY As String = System.IO.File.ReadAllText("C:\LEADTOOLS 20\Support\Common\License\leadtools.lic.key") 
   RasterSupport.SetLicense(MY_LICENSE_FILE, MY_DEVELOPER_KEY) 
                 
   MyBase.OnLoad(e) 
End Sub 
 
Private Function CreateMultiPageFile(ByVal codecs As RasterCodecs) As String 
   ' Create a multipage TIF file 
   Dim pageFileName() As String = _ 
   { _ 
      "C:\Users\Public\Documents\LEADTOOLS Images\Ocr1.tif", _ 
      "C:\Users\Public\Documents\LEADTOOLS Images\Ocr2.tif", _ 
      "C:\Users\Public\Documents\LEADTOOLS Images\Ocr3.tif", _ 
      "C:\Users\Public\Documents\LEADTOOLS Images\Ocr4.tif" _ 
   } 
   Dim image As RasterImage = Nothing 
   For i As Integer = 0 To pageFileName.Length - 1 
      ' load the page image 
      Dim page As RasterImage = codecs.Load(pageFileName(i)) 
      If (i = 0) Then 
         ' first image, just save it into our variable 
         image = page 
      Else 
         ' add this page into our image 
         image.AddPage(page) 
         ' we do not need this page anymore 
         page.Dispose() 
      End If 
   Next 
   Dim outputFileName As String = "C:\Users\Public\Documents\LEADTOOLS Images\MultiPage.tif" 
   If (File.Exists(outputFileName)) Then 
      File.Delete(outputFileName) 
   End If 
   codecs.Save(image, outputFileName, RasterImageFormat.Tif, 1, 1, 4, 1, CodecsSavePageMode.Overwrite) 
   image.Dispose() 
   Return outputFileName 
End Function

protected override void OnLoad(EventArgs e) 
{                
   // Requires a license file that unlocks 1D barcode read functionality. 
   string MY_LICENSE_FILE = @"C:\LEADTOOLS 20\Support\Common\License\leadtools.lic"; 
   string MY_DEVELOPER_KEY = System.IO.File.ReadAllText(@"C:\LEADTOOLS 20\Support\Common\License\leadtools.lic.key"); 
   RasterSupport.SetLicense(MY_LICENSE_FILE, MY_DEVELOPER_KEY); 
 
   buttonSplit.Click += buttonSplit_Click; 
                 
   base.OnLoad(e); 
} 
 
private string CreateMultiPageFile(RasterCodecs codecs) 
{ 
   // Create a multipage TIF file 
   string[] pageFileName = 
   { 
      @"C:\Users\Public\Documents\LEADTOOLS Images\Ocr1.tif", 
      @"C:\Users\Public\Documents\LEADTOOLS Images\Ocr2.tif", 
      @"C:\Users\Public\Documents\LEADTOOLS Images\Ocr3.tif", 
      @"C:\Users\Public\Documents\LEADTOOLS Images\Ocr4.tif" 
   }; 
   RasterImage image = null; 
   for(int i = 0; i < pageFileName.Length; i++) 
   { 
      // load the page image 
      RasterImage page = codecs.Load(pageFileName[i]); 
      if(i == 0) 
      { 
         // first image, just save it into our variable 
         image = page; 
      } 
      else 
      { 
         // add this page into our image 
         image.AddPage(page); 
         // we do not need this page anymore 
         page.Dispose(); 
      } 
   } 
   string outputFileName = @"C:\Users\Public\Documents\LEADTOOLS Images\MultiPage.tif"; 
   if(File.Exists(outputFileName)) 
      File.Delete(outputFileName); 
   codecs.Save(image, outputFileName, RasterImageFormat.Tif, 1, 1, 4, 1, CodecsSavePageMode.Overwrite); 
   image.Dispose(); 
   return outputFileName; 
}

Add an event handler to the buttonSplit Click event and code it as follows:

Private Sub buttonSplit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles buttonSplit.Click 
   ' Initialize a new RasterCodecs object. 
   Dim codecs As New RasterCodecs() 
   Dim multiPageFileName As String = CreateMultiPageFile(codecs) 
   ' Find out how many pages the file has 
   Dim info As CodecsImageInfo = codecs.GetInformation(multiPageFileName, True) 
   ' Loop through the pages of the file; perform specific processing on it, then save each page to a separate file: 
   Dim flip As New FlipCommand() 
   Dim outputDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
   For pageNumber As Integer = 1 To info.TotalPages 
      ' Load the next image in the loop 
      Dim image As RasterImage = codecs.Load(multiPageFileName, 0, CodecsLoadByteOrder.BgrOrGray, pageNumber, pageNumber) 
      ' Perform specific processing on the page, such as flipping it 
      flip.Run(image) 
      ' Save the page to a separate file 
      Dim pageFileName As String = Path.Combine(outputDir, "Page" + pageNumber.ToString() + ".tif") 
      codecs.Save(image, pageFileName, RasterImageFormat.Tif, 0) 
   Next 
End Sub

private void buttonSplit_Click(object sender, System.EventArgs e) 
{ 
   // Initialize a new RasterCodecs object. 
   RasterCodecs codecs = new RasterCodecs(); 
   string multiPageFileName = CreateMultiPageFile(codecs); 
   // Find out how many pages the file has 
   CodecsImageInfo info = codecs.GetInformation(multiPageFileName, true); 
                    
   // Loop through the pages of the file; perform specific processing on it, then save each page to a separate file: 
   FlipCommand flip = new FlipCommand(); 
   string outputDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
   for(int pageNumber = 1; pageNumber <= info.TotalPages; pageNumber++) 
   { 
      // Load the next image in the loop 
      RasterImage image = codecs.Load(multiPageFileName, 0, CodecsLoadByteOrder.BgrOrGray, pageNumber, pageNumber); 
      // Perform specific processing on the page, such as flipping it 
      flip.Run(image); 
      // Save the page to a separate file 
      string pageFileName = Path.Combine(outputDir, "Page" + pageNumber + ".tif"); 
      codecs.Save(image, pageFileName, RasterImageFormat.Tif, 0); 
      image.Dispose(); 
   } 
}

Build and run the program to test it.

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Help Version 20.0.2020.4.3