|
Products | Support | Email a link to this topic. | Send comments on this topic. | Back to Introduction | Help Version 19.0.7.12
|
LEADTOOLS Library
Show in webframe
|
|
Products | Support | Email a link to this topic. | Send comments on this topic. | Back to Introduction | Help Version 19.0.7.12
|
Take the following steps to start a project and to add some code that prints an image:
Start Visual Studio .NET
Choose File->New->Project... from the menu
In the New Project dialog box, choose either "Visual C#" or "Visual Basic" in the Projects Type List, and choose "Windows Forms Application" in the Templates List
Enter the project name as "PrintImageTutorial" in the Name field, and then click OK. If desired, type a new location for your project or select a directory using the Browse button, and then click OK
In the "Solution Explorer" window, right-click on the project and select "Add Reference..." from the context menu. In the "Add Reference" dialog box, select the ".NET" tab and select the following components - If you used the LEADTOOLS Setup, the LEADTOOLS components will be visible under the .NET components and you should select them from the list, otherwise, select the "Browse" tab and browse to the LEADTOOLS setup folder - Default location is: <LEADTOOLS_INSTALLDIR>\Bin\Dotnet4\Win32
The above references will allow you to use BMP, JPG and TIF files. If you require more file formats, please refer to the File Formats section in the Files To Be Included With Your Application topic
Since we are going to use the Win32 (x86) assembly references, we must change the build target of this project to be x86. Select Project->PrintImageTutorial Properties from the main menu and in the project properties dialog, and follow the following steps:
For the C# project, select the Build tab, select "All Configurations" from the Configuration drop down selection box and select "x86" from the Platform target drop down selection box
For the VB project, select the Compile tab and select "All Configurations" from the Configuration drop down selection box. Click the Advanced Compile Options button and select "x86" from the Target CPU drop down selection box and click OK to close the dialog.
Make sure Form1 is in design view. From the toolbox (View->Toolbox from the main menu), drag and drop a MenuStrip control to the form. Click on the new menuStrip1 control and add the following top-level menu items:
| Type | Name | Text | Shortcut Keys |
|---|---|---|---|
| ToolStripMenuItem | fileToolStripMenuItem | File | |
| ToolStripMenuItem | pageToolStripMenuItem | Page | |
| ToolStripMenuItem | optionsToolStripMenuItem | Options |
Select the "File" menu item and add the following sub items:
| Type | Name | Text | Shortcut Keys |
|---|---|---|---|
| ToolStripMenuItem | openToolStripMenuItem | Open... | Ctrl+O |
| ToolStripSeparator | toolStripMenuItem1 | ||
| ToolStripMenuItem | printPreviewToolStripMenuItem | Print preview | |
| ToolStripMenuItem | printSetupToolStripMenuItem | Print setup... | |
| ToolStripMenuItem | printToolStripMenuItem | Print... | Ctrl+P |
| ToolStripSeparator | toolStripMenuItem2 | ||
| ToolStripMenuItem | exitToolStripMenuItem | Exit |
Select the "Page" menu item and add the following sub items:
| Type | Name | Text | Shortcut Keys |
|---|---|---|---|
| ToolStripMenuItem | firstPageToolStripMenuItem | First page | |
| ToolStripMenuItem | previousPageToolStripMenuItem | Previous page | |
| ToolStripMenuItem | nextPageToolStripMenuItem | Next page | |
| ToolStripMenuItem | lastPageToolStripMenuItem | Last page |
Select the "Options" menu item and add the following sub items:
| Type | Name | Text | Shortcut Keys |
|---|---|---|---|
| ToolStripMenuItem | usePageMarginsToolStripMenuItem | Use page margins | |
| ToolStripMenuItem | fitImageToPageToolStripMenuItem | Fit image to page |
Go to the toolbox (View->Toolbox) and drag and drop an instance of LEADTOOLS ImageViewer control to the form (If you do not have ImageViewer in your toolbox, select Tools->Choose Toolbox Items from the main menu. Select the ".NET Framework Components" tab and select the "ImageViewer" component). After you dropped the new control to the form, change the following properties of "rasterImageViewer1" to the specified values:
| Property | Value |
|---|---|
| Dock | Fill |
| UseDpi | True |
Switch to Form1 code view (right-click Form1 in the solution explorer then select View Code) and add the following lines at the beginning of the file:
[Visual Basic]
Imports System.Drawing.Printing
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.WinForms
[C#]
using System.Drawing.Printing;
using Leadtools;
using Leadtools.Codecs;
using Leadtools.WinForms;
Add the following private variables to Form1:
[Visual Basic]
' The RasterCodecs object to use when loading images
Private _rasterCodecs As RasterCodecs
' The PrintDocument object we will be using throughout this demo
Private _printDocument As PrintDocument
' The current page number bring printed
Private _currentPrintPageNumber As Integer
' The current image file name
Private _currentImageFileName As String
[C#]
// The RasterCodecs object to use when loading images
private RasterCodecs _rasterCodecs;
// The PrintDocument object we will be using throughout this demo
private PrintDocument _printDocument;
// The current page number bring printed
private int _currentPrintPageNumber;
// The current image file name
private string _currentImageFileName;
Add the following code to Form1:
[Visual Basic]
Protected Overrides Sub OnLoad(ByVal e As System.EventArgs)
' Initialize the RasterCodecs object to use when loading image
Me._rasterCodecs = New RasterCodecs()
' Check if we have any printers installed
If IsNothing(PrinterSettings.InstalledPrinters) OrElse (PrinterSettings.InstalledPrinters.Count < 1) Then
MessageBox.Show( _
Me, _
"No printer installed on this machine, this tutorial cannot continue", _
"PrintImageTutorial", _
MessageBoxButtons.OK, _
MessageBoxIcon.Exclamation)
Me.Close()
Else
' Create the print document object we will be using
Me._printDocument = New PrintDocument()
' Add handlers for the print events
AddHandler Me._printDocument.BeginPrint, AddressOf _printDocument_BeginPrint
AddHandler Me._printDocument.PrintPage, AddressOf _printDocument_PrintPage
AddHandler Me._printDocument.EndPrint, AddressOf _printDocument_EndPrint
End If
MyBase.OnLoad(e)
End Sub
Protected Overrides Sub OnFormClosed(ByVal e As System.Windows.Forms.FormClosedEventArgs)
' Dispose the resources we are using
If Not IsNothing(Me._printDocument) Then
Me._printDocument.Dispose()
End If
If Not IsNothing(Me._rasterCodecs) Then
Me._rasterCodecs.Dispose()
End If
MyBase.OnFormClosed(e)
End Sub
[C#]
protected override void OnLoad(EventArgs e)
{
// Initialize the RasterCodecs object to use when loading image
this._rasterCodecs = new RasterCodecs();
// Check if we have any printers installed
if(PrinterSettings.InstalledPrinters == null || PrinterSettings.InstalledPrinters.Count < 1)
{
MessageBox.Show(
this,
"No printer installed on this machine, this tutorial cannot continue",
"PrintImageTutorial",
MessageBoxButtons.OK,
MessageBoxIcon.Exclamation);
this.Close();
}
else
{
// Create the print document object we will be using
this._printDocument = new PrintDocument();
// Add handlers for the print events
this._printDocument.BeginPrint += new PrintEventHandler(_printDocument_BeginPrint);
this._printDocument.PrintPage += new PrintPageEventHandler(_printDocument_PrintPage);
this._printDocument.EndPrint += new PrintEventHandler(_printDocument_EndPrint);
}
base.OnLoad(e);
}
protected override void OnFormClosed(FormClosedEventArgs e)
{
// Dispose the resources we are using
if(this._printDocument != null)
{
this._printDocument.Dispose();
}
if(this._rasterCodecs != null)
{
this._rasterCodecs.Dispose();
}
base.OnFormClosed(e);
}
Add the following code to the DropDownOpening event of the fileToolStripMenuItem menu item:
[Visual Basic]
Private Sub fileToolStripMenuItem_DropDownOpening(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles fileToolStripMenuItem.DropDownOpening
' Update the UI state
printPreviewToolStripMenuItem.Enabled = Not IsNothing(rasterImageViewer1.Image)
printToolStripMenuItem.Enabled = Not IsNothing(rasterImageViewer1.Image)
End Sub
[C#]
private void fileToolStripMenuItem_DropDownOpening(object sender, EventArgs e)
{
// Update the UI state
printPreviewToolStripMenuItem.Enabled = (rasterImageViewer1.Image != null);
printToolStripMenuItem.Enabled = (rasterImageViewer1.Image != null);
}
Add the following code to the Click event of the openToolStripMenuItem menu item:
[Visual Basic]
Private Sub openToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles openToolStripMenuItem.Click
' Load an image into the viewer
Using dlg As New OpenFileDialog()
dlg.Filter = "All Files|*.*"
If dlg.ShowDialog(Me) = DialogResult.OK Then
Try
' Load all the pages in the file
rasterImageViewer1.Image = Me._rasterCodecs.Load(dlg.FileName)
Me._currentImageFileName = dlg.FileName
UpdateCaption()
Catch ex As Exception
MessageBox.Show(Me, ex.Message, "PrintImageTutorial", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
End Try
End If
End Using
End Sub
[C#]
private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
// Load an image into the viewer
using(OpenFileDialog dlg = new OpenFileDialog())
{
dlg.Filter = "All Files|*.*";
if(dlg.ShowDialog(this) == DialogResult.OK)
{
try
{
// Load all the pages in the file
rasterImageViewer1.Image = this._rasterCodecs.Load(dlg.FileName);
this._currentImageFileName = dlg.FileName;
UpdateCaption();
}
catch(Exception ex)
{
MessageBox.Show(this, ex.Message, "PrintImageTutorial", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
}
}
Add the following code to the Click event of the printPreviewToolStripMenuItem menu item:
[Visual Basic]
Private Sub printPreviewToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles printPreviewToolStripMenuItem.Click
' Set the print document
SetupPrintDocument()
' Use the .NET PrintPreviewDialog
Using dlg As New PrintPreviewDialog()
' Show the dialog
dlg.Document = Me._printDocument
dlg.WindowState = FormWindowState.Maximized
dlg.ShowDialog(Me)
End Using
End Sub
[C#]
private void printPreviewToolStripMenuItem_Click(object sender, EventArgs e)
{
// Set the print document
SetupPrintDocument();
// Use the .NET PrintPreviewDialog
using(PrintPreviewDialog dlg = new PrintPreviewDialog())
{
// Show the dialog
dlg.Document = this._printDocument;
dlg.WindowState = FormWindowState.Maximized;
dlg.ShowDialog(this);
}
}
Add the following code to the Click event of the printSetupToolStripMenuItem menu item:
[Visual Basic]
Private Sub printSetupToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles printSetupToolStripMenuItem.Click
' Use the .NET PageSetupDialog
Using dlg As New PageSetupDialog()
dlg.Document = Me._printDocument
dlg.ShowDialog(Me)
End Using
End Sub
[C#]
private void printSetupToolStripMenuItem_Click(object sender, EventArgs e)
{
// Use the .NET PageSetupDialog
using(PageSetupDialog dlg = new PageSetupDialog())
{
dlg.Document = this._printDocument;
dlg.ShowDialog(this);
}
}
Add the following code to the Click event of the printToolStripMenuItem menu item:
[Visual Basic]
Private Sub printToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles printToolStripMenuItem.Click
' User might press the shortcut key, so we need to check
' if we are in a valid print state even though we disabled
' the menu item
If IsNothing(rasterImageViewer1.Image) Then
Return
End If
' Directly print with showing the print preview dialog
' Set the print document
SetupPrintDocument()
Me._printDocument.Print()
End Sub
[C#]
private void printToolStripMenuItem_Click(object sender, EventArgs e)
{
// User might press the shortcut key, so we need to check
// if we are in a valid print state even though we disabled
// the menu item
if(rasterImageViewer1.Image == null)
{
return;
}
// Directly print with showing the print preview dialog
// Set the print document
SetupPrintDocument();
this._printDocument.Print();
}
Add the following code to the Click event of the exitToolStripMenuItem menu item:
[Visual Basic]
Private Sub exitToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles exitToolStripMenuItem.Click
' Close the application
Close()
End Sub
[C#]
private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
// Close the application
Close();
}
Add the following code to the DropDownOpening event of the pageToolStripMenuItem menu item:
[Visual Basic]
Private Sub pageToolStripMenuItem_DropDownOpening(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles pageToolStripMenuItem.DropDownOpening
' Update the UI state
firstPageToolStripMenuItem.Enabled = Not IsNothing(rasterImageViewer1.Image) AndAlso (rasterImageViewer1.Image.Page > 1)
previousPageToolStripMenuItem.Enabled = firstPageToolStripMenuItem.Enabled
nextPageToolStripMenuItem.Enabled = Not IsNothing(rasterImageViewer1.Image) AndAlso (rasterImageViewer1.Image.Page < rasterImageViewer1.Image.PageCount)
lastPageToolStripMenuItem.Enabled = nextPageToolStripMenuItem.Enabled
End Sub
[C#]
private void pageToolStripMenuItem_DropDownOpening(object sender, EventArgs e)
{
// Update the UI state
firstPageToolStripMenuItem.Enabled = (rasterImageViewer1.Image != null && rasterImageViewer1.Image.Page > 1);
previousPageToolStripMenuItem.Enabled = firstPageToolStripMenuItem.Enabled;
nextPageToolStripMenuItem.Enabled = (rasterImageViewer1.Image != null && rasterImageViewer1.Image.Page < rasterImageViewer1.Image.PageCount);
lastPageToolStripMenuItem.Enabled = nextPageToolStripMenuItem.Enabled;
}
Add the following code to the Click event of the firstPageToolStripMenuItem menu item:
[Visual Basic]
Private Sub firstPageToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles firstPageToolStripMenuItem.Click
' Go to the first page in the image
rasterImageViewer1.Image.Page = 1
UpdateCaption()
End Sub
[C#]
private void firstPageToolStripMenuItem_Click(object sender, EventArgs e)
{
// Go to the first page in the image
rasterImageViewer1.Image.Page = 1;
UpdateCaption();
}
Add the following code to the Click event of the previousPageToolStripMenuItem menu item:
[Visual Basic]
Private Sub previousPageToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles previousPageToolStripMenuItem.Click
' Go to the previous page in the image
rasterImageViewer1.Image.Page = rasterImageViewer1.Image.Page - 1
UpdateCaption()
End Sub
[C#]
private void previousPageToolStripMenuItem_Click(object sender, EventArgs e)
{
// Go to the previous page in the image
rasterImageViewer1.Image.Page--;
UpdateCaption();
}
Add the following code to the Click event of the nextPageToolStripMenuItem menu item:
[Visual Basic]
Private Sub nextPageToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles nextPageToolStripMenuItem.Click
' Go to the next page in the image
rasterImageViewer1.Image.Page = rasterImageViewer1.Image.Page + 1
UpdateCaption()
End Sub
[C#]
private void nextPageToolStripMenuItem_Click(object sender, EventArgs e)
{
// Go to the next page in the image
rasterImageViewer1.Image.Page++;
UpdateCaption();
}
Add the following code to the Click event of the lastPageToolStripMenuItem menu item:
[Visual Basic]
Private Sub lastPageToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lastPageToolStripMenuItem.Click
' Go to the last page in the image
rasterImageViewer1.Image.Page = rasterImageViewer1.Image.PageCount
UpdateCaption()
End Sub
[C#]
private void lastPageToolStripMenuItem_Click(object sender, EventArgs e)
{
// Go to the last page in the image
rasterImageViewer1.Image.Page = rasterImageViewer1.Image.PageCount;
UpdateCaption();
}
Add the following code to the Click event of the usePageMarginsToolStripMenuItem menu item:
[Visual Basic]
Private Sub usePageMarginsToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles usePageMarginsToolStripMenuItem.Click
' Toggle the option
usePageMarginsToolStripMenuItem.Checked = Not usePageMarginsToolStripMenuItem.Checked
End Sub
[C#]
private void usePageMarginsToolStripMenuItem_Click(object sender, EventArgs e)
{
// Toggle the option
usePageMarginsToolStripMenuItem.Checked = !usePageMarginsToolStripMenuItem.Checked;
}
Add the following code to the Click event of the fitImageToPageToolStripMenuItem menu item:
[Visual Basic]
Private Sub fitImageToPageToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles fitImageToPageToolStripMenuItem.Click
' Toggle the option
fitImageToPageToolStripMenuItem.Checked = Not fitImageToPageToolStripMenuItem.Checked
End Sub
[C#]
private void fitImageToPageToolStripMenuItem_Click(object sender, EventArgs e)
{
// Toggle the option
fitImageToPageToolStripMenuItem.Checked = !fitImageToPageToolStripMenuItem.Checked;
}
Add the following code to the Form1:
[Visual Basic]
Private Sub UpdateCaption()
' Update the caption of this demo to show the loaded image file name
' and current page number
If Not IsNothing(rasterImageViewer1.Image) Then
Text = String.Format( _
"{0} - Page {1} (of {2}) - PrintImageTutorial", _
Me._currentImageFileName, _
rasterImageViewer1.Image.Page, _
rasterImageViewer1.Image.PageCount)
Else
Text = "PrintImageTutorial"
End If
End Sub
Private Sub SetupPrintDocument()
' Called before Print Preview or Print to set up the document
' Minimum/maximum is the number of pages in the image
Me._printDocument.PrinterSettings.MinimumPage = 1
Me._printDocument.PrinterSettings.MaximumPage = rasterImageViewer1.Image.PageCount
' Default to print all the pages
Me._printDocument.PrinterSettings.FromPage = Me._printDocument.PrinterSettings.MinimumPage
Me._printDocument.PrinterSettings.ToPage = Me._printDocument.PrinterSettings.MaximumPage
' Set up the document name
Me._printDocument.DocumentName = Me._currentImageFileName
End Sub
Private Sub _printDocument_BeginPrint(ByVal sender As Object, ByVal e As PrintEventArgs)
' Reset the page number back to the first page
Me._currentPrintPageNumber = 1
End Sub
Private Sub _printDocument_PrintPage(ByVal sender As Object, ByVal e As PrintPageEventArgs)
' Print a page here
' Get the print document object
Dim document As PrintDocument = DirectCast(sender, PrintDocument)
' Create an new LEADTOOLS image printer class
Dim printer As New RasterImagePrinter()
' Set the document object so page calculations can be performed
printer.PrintDocument = document
' Check if we want to fit the image
If fitImageToPageToolStripMenuItem.Checked Then
' Yes, fit and center the image into the maximum print area
printer.SizeMode = RasterPaintSizeMode.FitAlways
printer.HorizontalAlignMode = RasterPaintAlignMode.Center
printer.VerticalAlignMode = RasterPaintAlignMode.Center
Else
' No, print as normal (original size)
printer.SizeMode = RasterPaintSizeMode.Normal
printer.HorizontalAlignMode = RasterPaintAlignMode.Near
printer.VerticalAlignMode = RasterPaintAlignMode.Near
End If
' Account for FAX images that may have different horizontal and vertical resolution
printer.UseDpi = True
' Print the whole image
printer.ImageRectangle = Rectangle.Empty
' Use maximum page dimension, me will be equivalent of printing
' using Windows Photo Gallery
printer.PageRectangle = RectangleF.Empty
' Inform the printer whether we want to ignore the page margins
printer.UseMargins = usePageMarginsToolStripMenuItem.Checked
' Print the current page
printer.Print(rasterImageViewer1.Image, Me._currentPrintPageNumber, e)
' Go to the next page
Me._currentPrintPageNumber = Me._currentPrintPageNumber + 1
' Inform the printer whether we have more pages to print
If Me._currentPrintPageNumber <= document.PrinterSettings.ToPage Then
e.HasMorePages = True
Else
e.HasMorePages = False
End If
End Sub
Private Sub _printDocument_EndPrint(ByVal sender As Object, ByVal e As PrintEventArgs)
' Nothing to do here in this tutorial
End Sub
[C#]
private void UpdateCaption()
{
// Update the caption of this demo to show the loaded image file name
// and current page number
if(rasterImageViewer1.Image != null)
{
Text = string.Format(
"{0} - Page {1} (of {2}) - PrintImageTutorial",
this._currentImageFileName,
rasterImageViewer1.Image.Page,
rasterImageViewer1.Image.PageCount);
}
else
{
Text = "PrintImageTutorial";
}
}
private void SetupPrintDocument()
{
// Called before Print Preview or Print to set up the document
// Minimum/maximum is the number of pages in the image
this._printDocument.PrinterSettings.MinimumPage = 1;
this._printDocument.PrinterSettings.MaximumPage = rasterImageViewer1.Image.PageCount;
// Default to print all the pages
this._printDocument.PrinterSettings.FromPage = this._printDocument.PrinterSettings.MinimumPage;
this._printDocument.PrinterSettings.ToPage = this._printDocument.PrinterSettings.MaximumPage;
// Set up the document name
this._printDocument.DocumentName = this._currentImageFileName;
}
private void _printDocument_BeginPrint(object sender, PrintEventArgs e)
{
// Reset the page number back to the first page
this._currentPrintPageNumber = 1;
}
private void _printDocument_PrintPage(object sender, PrintPageEventArgs e)
{
// Print a page here
// Get the print document object
PrintDocument document = sender as PrintDocument;
// Create an new LEADTOOLS image printer class
RasterImagePrinter printer = new RasterImagePrinter();
// Set the document object so page calculations can be performed
printer.PrintDocument = document;
// Check if we want to fit the image
if(fitImageToPageToolStripMenuItem.Checked)
{
// Yes, fit and center the image into the maximum print area
printer.SizeMode = RasterPaintSizeMode.FitAlways;
printer.HorizontalAlignMode = RasterPaintAlignMode.Center;
printer.VerticalAlignMode = RasterPaintAlignMode.Center;
}
else
{
// No, print as normal (original size)
printer.SizeMode = RasterPaintSizeMode.Normal;
printer.HorizontalAlignMode = RasterPaintAlignMode.Near;
printer.VerticalAlignMode = RasterPaintAlignMode.Near;
}
// Account for FAX images that may have different horizontal and vertical resolution
printer.UseDpi = true;
// Print the whole image
printer.ImageRectangle = Rectangle.Empty;
// Use maximum page dimension, this will be equivalent of printing
// using Windows Photo Gallery
printer.PageRectangle = RectangleF.Empty;
// Inform the printer whether we want to ignore the page margins
printer.UseMargins = usePageMarginsToolStripMenuItem.Checked;
// Print the current page
printer.Print(rasterImageViewer1.Image, this._currentPrintPageNumber, e);
// Go to the next page
this._currentPrintPageNumber++;
// Inform the printer whether we have more pages to print
if(this._currentPrintPageNumber <= document.PrinterSettings.ToPage)
{
e.HasMorePages = true;
}
else
{
e.HasMorePages = false;
}
}
private void _printDocument_EndPrint(object sender, PrintEventArgs e)
{
// Nothing to do here in this tutorial
}
Build, and Run the program to test it.
NOTE: If you encounter an "Invalid File Format" or "Feature Not Supported" exception, please refer to the topic Invalid File Format/Feature Not Supported.