ImageGear .NET v25.0 - Updated
WPF Application
Getting Started > Tutorial: Create Your First Project > WPF Application

In this tutorial, you will configure a C# or VB.NET project for a WPF application and use ImageGear .NET capabilities. You will also learn how to zoom in/out and rotate a file that is loaded.

It should be noted that ImageGear .NET provides WPF GUI components which can help speed up the integration of ImageGear .NET with your application. Steps to install these components can be found under Installing GUI Components.

The following tutorial refers specifically to 64-bit installations; for 32-bit installations:

Using Visual Studio 2015 or later:

  1. Create a new "WPF Application" project, using C# or VB.NET and name the project: IG_Tutorial_WPF.
  2. If you installed ImageGear .NET 64-bit, using the Configuration Manager, create a new project platform (if you don’t have one already) for x64. Make sure your project is set to compile targeting Debug and x64. Make sure you now have $YOURLOCALPROJ\bin\x64\Debug\, and if it is not there, create it.
  3. Add references and required resources into your projects in one of the following ways:
    • Recommended: use our NuGet Packages. For this project, you need the following packages:
      Accusoft.ImageGear.WPF.nupkg (https://www.nuget.org/packages/Accusoft.ImageGear.WPF/)
      Accusoft.ImageGear.ART.WPF.nupkg (https://www.nuget.org/packages/Accusoft.ImageGear.ART.WPF/)
    • Manually:
      1. Copy all files (and folders) inside $INSTALLDIR\Bin\x64 to your local output bin directory in your project (i.e., $YOURLOCALPROJ\bin\x64\Debug\ ).
      2. Manually add the reference System.Windows.Forms to your project from the .NET Assemblies tab.
      3. Add the following references to your project from $YOURLOCALPROJ\bin\x64\Debug\:
        • ImageGear.Core.dll
        • ImageGear.Art.dll
        • ImageGear.Evaluation.dll
        • ImageGear.Formats.Common.dll
        • ImageGear.Presentation.dll
        • ImageGear.Windows.Controls.dll
        • ImageGear.Wpf.dll

    Your output target directory should be set to $YOURLOCALPROJ\bin\x64\Debug\  

  4. Open the MainWindow.xaml screen with both the Design and XAML panels for the window visible. You will use the XAML panel to create the graphical user interface. First, in the XAML panel, create a custom alias namespace. So, add some code to the header so it looks like this:
    XAML
    Copy Code

    <Window x:Class="MainWindow"
           xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
           xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
           xmlns:custom="clr-namespace:IG_Tutorial_WPF"
           xmlns:IGWC="clr-namespace:ImageGear.Windows.Controls;assembly=ImageGear.Windows.Controls"
           Title="MainWindow" Height="300" Width="300">
    </Window>

  5. For organizational purposes, we will use a Grid. Inside of that Grid we will have a Menu. That Menu will have a File > Open item that will be responsible for opening a file, View > Zoom In | Zoom Out for zoom in/out on the file loaded and Processing > Rotate 90 for rotating the file loaded. To finish the GUI, we also need a PageView control, which will be used to display the file. After adding these controls, the XAML code should result in the following:
    XAML
    Copy Code

    <Window x:Class="MainWindow"
           xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
           xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
           xmlns:custom="clr-namespace:IG_Tutorial_WPF"
           xmlns:IGWC="clr-namespace:ImageGear.Windows.Controls;assembly=ImageGear.Windows.Controls"
           Title="MainWindow" Height="300" Width="300">
      
       <Window.CommandBindings>
           <CommandBinding
       Command="Open"
       Executed="OpenExecuted"/>
           <CommandBinding
       Command="{x:Static custom:MainWindow.ZoomInCmd}"
       CanExecute="CanExectutePageAvailable"
       Executed="ZoomInExecuted"/>
           <CommandBinding
       Command="{x:Static custom:MainWindow.ZoomOutCmd}"
       CanExecute="CanExectutePageAvailable"
       Executed="ZoomOutExecuted"/>
           <CommandBinding
       Command="{x:Static custom:MainWindow.Rotate90Cmd}"
       CanExecute="CanExectutePageAvailable"
       Executed="ExectutedRotate90"/>
       </Window.CommandBindings>
     
       <Grid>
           <DockPanel Name="DockPanel1">
               <Menu DockPanel.Dock="Top" Height="22" Name="menu1">
                   <MenuItem Name="mnuFile" Header="_File">
                       <MenuItem Name="mnuFileOpen" Header="_Open" Command="Open"/>
                   </MenuItem>
                   <MenuItem Name="mnuView" Header="_View">
                       <MenuItem Name="mnuViewZoomIn" Header="Zoom _In" Command="{x:Static custom:MainWindow.ZoomInCmd}"/>
                       <MenuItem Name="mnuViewZoomOut" Header="Zoom _Out" Command="{x:Static custom:MainWindow.ZoomOutCmd}"/>
                   </MenuItem>
                   <MenuItem Name="mnuProcessing" Header="_Processing">
                       <MenuItem Name="mnuProcessingRot90" Header="Rotate 90" Command="{x:Static custom:MainWindow.Rotate90Cmd}"/>
                   </MenuItem>
               </Menu>
               <IGWC:PageView x:Name="imGearPageView1"/>
           </DockPanel>
       </Grid>
    </Window>

  6. Each Command Binding entry will have its own handler for Executed, but all of them will share a single handler for CanExecute. Right-click over each handler created and navigate to its definition in the .xaml.cs file. In the case of CanExecute, you can navigate to its definition through any of the controls.
  7. Next, add the functionality to the controls in the MainWindow.xaml.cs file:  
    1. First, add some using statements and declare the some members required for this project.
    2. Second, declare the static RoutedCommands required for the controls created.  
    3. Third, add two member variables to the class: ImGearPage to hold the image data and ImGearPageDisplay to control how it is shown.
    4. Finally, add the code for the commands that will be executed by each control.

    The body of the MainWindow class should look like this:

    C#
    Copy Code 
    using System.Diagnostics;
using System.IO;
using System.Windows;
using System.Windows.Input;

using ImageGear.Core;
using ImageGear.Display;
using ImageGear.Evaluation;
using ImageGear.Formats;
using ImageGear.Processing;

namespace IG_Tutorial_WPF
{

   public partial class MainWindow : Window
   {
       public static RoutedCommand ZoomInCmd = new RoutedCommand();
       public static RoutedCommand ZoomOutCmd = new RoutedCommand();
       public static RoutedCommand Rotate90Cmd = new RoutedCommand();

       // Hold the image data.
       ImGearPage igPage = null;
       // Control how the page is displayed.
       ImGearPresentationPageDisplay igPageDisplay = null;

       public MainWindow()
       {

           // Initialize evaluation license.
           ImGearEvaluationManager.Initialize();

           // Initialize common formats.
           ImGearCommonFormats.Initialize();

           InitializeComponent();
       }

       private void OpenExecuted(object sender, ExecutedRoutedEventArgs e)
       {
              // Initialize open file dialog.
              Microsoft.Win32.OpenFileDialog dialog = new Microsoft.Win32.OpenFileDialog();
              dialog.Filter = ImGearFileFormats.GetSavingFilter(ImGearSavingFormats.UNKNOWN);
              // Run open file dialog.
              if (dialog.ShowDialog(this) == true)
              {
                     using (Stream stream = new FileStream(dialog.FileName, FileMode.Open, FileAccess.Read))
                     {
                            igPage = ImGearFileFormats.LoadPage(stream, 0);
                     }
                     if (null != igPage && null != igPage.DIB && !igPage.DIB.IsEmpty())
                     {
                            // Create a new page display.
                            imGearPageDisplay = new ImGearPresentationPageDisplay(igPage);
 
                            // Associate the page display with the page view.
                            imGearPageView1.Display = imGearPageDisplay;
 
                            // Cause the page view to update.
                            imGearPageView1.Update();
                     }
              }
       }


       private void ZoomInExecuted(object sender, ExecutedRoutedEventArgs e)
       {
           // Get the current zoom info.  
           ImGearZoomInfo igZoomInfo = igPageDisplay.GetZoomInfo(imGearPageView1);
           // Increase the zoom.  
           igZoomInfo.Horizontal.Value = igZoomInfo.Horizontal.Value * 1.25;
           igZoomInfo.Vertical.Value = igZoomInfo.Vertical.Value * 1.25;
           igZoomInfo.Horizontal.Fixed = true;
           igZoomInfo.Vertical.Fixed = true;
           // Set the new zoom values.
           igPageDisplay.UpdateZoomFrom(igZoomInfo);
           // Trigger an update, letting it know only the layout has changed.
           imGearPageView1.Update(true);

       }

       private void ZoomOutExecuted(object sender, ExecutedRoutedEventArgs e)
       {
           // Get the current zoom info.  
           ImGearZoomInfo igZoomInfo = igPageDisplay.GetZoomInfo(imGearPageView1);
           igZoomInfo.Horizontal.Value = igZoomInfo.Horizontal.Value * (1 / 1.25);
           igZoomInfo.Vertical.Value = igZoomInfo.Vertical.Value * (1 / 1.25);
           igZoomInfo.Horizontal.Fixed = true;
           igZoomInfo.Vertical.Fixed = true;
           // Set the new zoom values.
           igPageDisplay.UpdateZoomFrom(igZoomInfo);
           // Trigger an update, letting it know only the layout has changed.
           imGearPageView1.Update(true);
       }

       private void ExectutedRotate90(object sender, ExecutedRoutedEventArgs e)
       {
           try
           {
               // Rotate the given page 90 degrees using ImGearRotationValues.VALUE_90.
               // ImGearRotationValues.VALUE_90 is the constant value for indicating the amount of the rotation.
               // It may be changed for other values, e.g. ImGearRotationValues.VALUE_180, ImGearRotationValues.VALUE_270.
               ImGearProcessing.Rotate(igPage, ImGearRotationValues.VALUE_90);
               imGearPageView1.Update();
           }
           catch (ImGearException ex)
           {
               Debug.WriteLine(ex.Message);
           }

       }

       private void CanExectutePageAvailable(object sender, CanExecuteRoutedEventArgs e)
       {
           e.CanExecute = (null != igPage && null != igPage.DIB
               && !igPage.DIB.IsEmpty() && null != igPageDisplay);
       }

   }
}
    VB.NET
    Copy Code 
    Imports System.Diagnostics
Imports System.IO
Imports System.Windows
Imports System.Windows.Input

Imports ImageGear.Core
Imports ImageGear.Display
Imports ImageGear.Evaluation
Imports ImageGear.Formats
Imports ImageGear.Processing

Class MainWindow
Inherits Window

   Public Shared ZoomInCmd As New RoutedCommand()
   Public Shared ZoomOutCmd As New RoutedCommand()
   Public Shared Rotate90Cmd As New RoutedCommand()

   ' Hold the image data.
   Private igPage As ImGearPage
   ' Control how the page is displayed.
   Private igPageDisplay As ImGearPresentationPageDisplay

   Public Sub New()

       'Initialize evaluation license.
       ImGearEvaluationManager.Initialize()

       'Initialize common formats.
       ImGearCommonFormats.Initialize()

       ' This call is required by the designer.
       InitializeComponent()

   End Sub

   Private Sub OpenExecuted(sender As Object, e As ExecutedRoutedEventArgs)
      Try
         ' Initialize open file dialog.
         Dim dialog As New Microsoft.Win32.OpenFileDialog()
         dialog.Title = "Select File"
         ' Run open file dialog.
         If dialog.ShowDialog(Me) = True Then
            ' Load the image into the page.
            Using stream As System.IO.Stream = New System.IO.FileStream(dialog.FileName, System.IO.FileMode.Open, System.IO.FileAccess.Read)
               ' Load the image into the page.
               igPage = ImGearFileFormats.LoadPage(stream, 0)
            End Using
         End If
         If Not igPage Is Nothing AndAlso Not igPage.DIB Is Nothing AndAlso Not igPage.DIB.IsEmpty() Then
            ' Create a new page display.
            igPageDisplay = New ImGearPresentationPageDisplay(igPage)
            ' Associate the page display with the page view.
            imGearPageView1.Display = igPageDisplay
            ' Cause the page view to update.
            imGearPageView1.Update()
         End If
      Catch exp As Exception
         ' Expose the error in status bar and message box.
         MessageBox.Show(Me, exp.Message)
      End Try
   End Sub
                  
 
   Private Sub ZoomInExecuted(sender As Object, e As ExecutedRoutedEventArgs)
       ' Get the current zoom info.  
       Dim igZoomInfo As ImGearZoomInfo = igPageDisplay.GetZoomInfo(imGearPageView1)
       'Increase the zoom.  
       igZoomInfo.Horizontal.Value = igZoomInfo.Horizontal.Value * 1.25
       igZoomInfo.Vertical.Value = igZoomInfo.Vertical.Value * 1.25
       igZoomInfo.Horizontal.Fixed = True
       igZoomInfo.Vertical.Fixed = True
       ' Set the New zoom values.
       igPageDisplay.UpdateZoomFrom(igZoomInfo)
       ' Trigger an update, letting it know only the layout has changed.
       imGearPageView1.Update(True)
   End Sub

   Private Sub ZoomOutExecuted(sender As Object, e As ExecutedRoutedEventArgs)
       ' Get the current zoom info.  
       Dim igZoomInfo As ImGearZoomInfo = igPageDisplay.GetZoomInfo(imGearPageView1)
       igZoomInfo.Horizontal.Value = igZoomInfo.Horizontal.Value * (1 / 1.25)
       igZoomInfo.Vertical.Value = igZoomInfo.Vertical.Value * (1 / 1.25)
       igZoomInfo.Horizontal.Fixed = True
       igZoomInfo.Vertical.Fixed = True
       ' Set the New zoom values.
       igPageDisplay.UpdateZoomFrom(igZoomInfo)
       ' Trigger an update, letting it know only the layout has changed.
       imGearPageView1.Update(True)
   End Sub

   Private Sub ExectutedRotate90(sender As Object, e As ExecutedRoutedEventArgs)
       Try
           ' Rotate the given page 90 degrees using ImGearRotationValues.VALUE_90.
           ' ImGearRotationValues.VALUE_90 Is the constant value for indicating the amount of the rotation.
           ' It may be changed for other values, e.g. ImGearRotationValues.VALUE_180, ImGearRotationValues.VALUE_270.
           ImGearProcessing.Rotate(igPage, ImGearRotationValues.VALUE_90)
           imGearPageView1.Update()
       Catch ex As ImGearException
           Debug.WriteLine(ex.Message)
       End Try
   End Sub

   Private Sub CanExectutePageAvailable(sender As Object, e As CanExecuteRoutedEventArgs)
       e.CanExecute = (Not igPage Is Nothing AndAlso Not igPage.DIB Is Nothing AndAlso
           Not igPage.DIB.IsEmpty() AndAlso Not igPageDisplay Is Nothing)
   End Sub

End Class

Now, we will go over some areas of this sample code in more detail.

  1. Declare the route commands required for this project in the .xaml.cs file as:
    C#
    Copy Code 
    public static RoutedCommand ZoomInCmd = new RoutedCommand();
public static RoutedCommand ZoomOutCmd = new RoutedCommand();
public static RoutedCommand Rotate90Cmd = new RoutedCommand();
    VB.NET
    Copy Code 
       Public Shared ZoomInCmd As New RoutedCommand()
   Public Shared ZoomOutCmd As New RoutedCommand()
   Public Shared Rotate90Cmd As New RoutedCommand()
  2. Then, add the Command Bindings in the .xaml file for the RoutedCommands created above:
    XAML
    Copy Code

    <Window.CommandBindings>
           <CommandBinding
       Command="Open"
       Executed="OpenExecuted"/>
           <CommandBinding
       Command="{x:Static custom:MainWindow.ZoomInCmd}"
       CanExecute="CanExectutePageAvailable"
       Executed="ZoomInExecuted"/>
           <CommandBinding
       Command="{x:Static custom:MainWindow.ZoomOutCmd}"
       CanExecute="CanExectutePageAvailable"
       Executed="ZoomOutExecuted"/>
           <CommandBinding
       Command="{x:Static custom:MainWindow.Rotate90Cmd}"
       CanExecute="CanExectutePageAvailable"
       Executed="ExectutedRotate90"/>
    </Window.CommandBindings>

  3. Then, add the ImGearEvaluationManager.Initialize() call if you are evaluating the product. You also need to initialize some formats.
    C#
    Copy Code 
                   public MainWindow()
       {
           // Initialize license for a Deployment(Runtime) license.
           //***The SetSolutionName, SetSolutionKey and possibly the SetOEMLicenseKey
           //methods must be called to distribute the runtime.***
           //ImGearLicense.SetSolutionName("YourSolutionName");
           //ImGearLicense.SetSolutionKey(12345, 12345, 12345, 12345);
           //Manually Reported Runtime licenses also require the following method
           //call to SetOEMLicenseKey.
           //ImGearLicense.SetOEMLicenseKey("2.0.AStringForOEMLicensing...");

           // Initialize evaluation license.
           ImGearEvaluationManager.Initialize();

           // Insert the HD Photo format held by the IGWPF component.
           ImGearFileFormats.Filters.Insert(0, ImGearHDPhoto.CreateHDPhotoFormat());
           // Initialize common formats.
           ImGearCommonFormats.Initialize();

           InitializeComponent();
       }
    VB.NET
    Copy Code 
       Public Sub New()

       ' Initialize license for a Deployment(Runtime) license.
       '***The SetSolutionName, SetSolutionKey and possibly the SetOEMLicenseKey
       'methods must be called to distribute the runtime.***
       'ImGearLicense.SetSolutionName("YourSolutionName");
       'ImGearLicense.SetSolutionKey(12345, 12345, 12345, 12345);
       'Manually Reported Runtime licenses also require the following method
       'call to SetOEMLicenseKey.
       'ImGearLicense.SetOEMLicenseKey("2.0.AStringForOEMLicensing...");

       'Initialize evaluation license.
       ImGearEvaluationManager.Initialize()

       'Initialize common formats.
       ImGearCommonFormats.Initialize()

       ' This call is required by the designer.
       InitializeComponent()

   End Sub
  4. Load and display a document:
    C#
    Copy Code 
                      ImGearLoadingSelection selection = ImGearWinForms.SelectLocalFileToLoad(null, "Select File");
           if (null != selection)
           {
               using (FileStream fileContent = ((ImGearLocalFile)
                  selection.File).OpenToRead())
               {
                   try
                   {
                       igPage = ImGearFileFormats.LoadPage(fileContent, 0);
                   }
                   catch (ImGearException ex)
                   {
                       Debug.WriteLine(ex.Message);
                   }
               }
               if (null != igPage && null != igPage.DIB &&
                   !igPage.DIB.IsEmpty())
               {
                   // Create a new page display.
                   igPageDisplay = new ImGearPresentationPageDisplay(igPage);
                   // Associate the page display with the page view.
                   imGearPageView1.Display = igPageDisplay;
                   // Cause the page view to update.
                   imGearPageView1.Update();
               }
           }
    VB.NET
    Copy Code 
           Dim selection As ImGearLoadingSelection = ImGearWinForms.SelectLocalFileToLoad(Nothing, "Select File")
       If Not selection Is Nothing Then
           Dim localFile As ImGearLocalFile = selection.File
           Using fileContent As FileStream = localFile.OpenToRead()
               Try
                   ' Load the image into the page.
                   igPage = ImGearFileFormats.LoadPage(fileContent, 0)
               Catch ex As ImGearException
                   Debug.WriteLine(ex.Message)
               End Try
               If Not igPage Is Nothing AndAlso Not igPage.DIB Is Nothing AndAlso Not igPage.DIB.IsEmpty() Then
                   ' Create a new page display.
                   igPageDisplay = New ImGearPresentationPageDisplay(igPage)
                   ' Associate the page display with the page view.
                   imGearPageView1.Display = igPageDisplay
                   ' Cause the page view to update.
                   imGearPageView1.Update()
               End If
           End Using
       End If
  5. Execute the Zoom In operation:
    C#
    Copy Code 
               // Get the current zoom info.  
           ImGearZoomInfo igZoomInfo = igPageDisplay.GetZoomInfo(imGearPageView1);
           // Increase the zoom.  
           igZoomInfo.Horizontal.Value = igZoomInfo.Horizontal.Value * 1.25;
           igZoomInfo.Vertical.Value = igZoomInfo.Vertical.Value * 1.25;
           igZoomInfo.Horizontal.Fixed = true;
           igZoomInfo.Vertical.Fixed = true;
           // Set the new zoom values.
           igPageDisplay.UpdateZoomFrom(igZoomInfo);
           // Trigger an update, letting it know only the layout has changed.
           imGearPageView1.Update(true);
    VB.NET
    Copy Code 
           ' Get the current zoom info.  
       Dim igZoomInfo As ImGearZoomInfo = igPageDisplay.GetZoomInfo(imGearPageView1)
       'Increase the zoom.  
       igZoomInfo.Horizontal.Value = igZoomInfo.Horizontal.Value * 1.25
       igZoomInfo.Vertical.Value = igZoomInfo.Vertical.Value * 1.25
       igZoomInfo.Horizontal.Fixed = True
       igZoomInfo.Vertical.Fixed = True
       ' Set the New zoom values.
       igPageDisplay.UpdateZoomFrom(igZoomInfo)
       ' Trigger an update, letting it know only the layout has changed.
       imGearPageView1.Update(True)

    Similarly, you can perform Zoom Out by modifying the multiplier of the Horizontal and Vertical values as (1/1.25). See the zoomOutToolStripMenuItem_Click function in the code example in step 5 of the WinForms Application.

  6. Finally, rotate the page displayed:
    C#
    Copy Code 
               try
           {
               // Rotate the given page 90 degrees using ImGearRotationValues.VALUE_90.
               // ImGearRotationValues.VALUE_90 is the constant value for indicating the amount of the rotation.
               // It may be changed for other values, e.g. ImGearRotationValues.VALUE_180, ImGearRotationValues.VALUE_270.
               ImGearProcessing.Rotate(igPage, ImGearRotationValues.VALUE_90);
               imGearPageView1.Update();
           }
           catch (ImGearException ex)
           {
               Debug.WriteLine(ex.Message);
           }
    VB.NET
    Copy Code 
           Try
           ' Rotate the given page 90 degrees using ImGearRotationValues.VALUE_90.
           ' ImGearRotationValues.VALUE_90 Is the constant value for indicating the amount of the rotation.
           ' It may be changed for other values, e.g. ImGearRotationValues.VALUE_180, ImGearRotationValues.VALUE_270.
           ImGearProcessing.Rotate(igPage, ImGearRotationValues.VALUE_90)
           imGearPageView1.Update()
       Catch ex As ImGearException
           Debug.WriteLine(ex.Message)
       End Try

    Notice that for performing 180 and 270 rotations, you can change the second parameter of the Rotate method to ImGearRotationValues.VALUE_180 and ImGearRotationValues.VALUE_270, respectively.

 

 

©2021. Accusoft Corporation. All Rights Reserved.

Send Documentation Feedback  |  Get Product Support