VintaSoft Imaging .NET SDK 12.3: Documentation for .NET developer
In This Topic
    PDF: View PDF annotations of PDF document in WinForms
    In This Topic
    PDF annotations can be displayed on PDF page in WinForms image viewer using visual tool - PdfAnnotationTool.

    For each PDF annotation is implemented a class, which defines how the annotation is displayed and how the user can interact with the annotation:
    The PdfAnnotationTool class can display annotations in two modes: None and View (PdfAnnotationTool.InteractionMode).

    In None mode the PdfAnnotationTool class:
    In View mode the PdfAnnotationTool class:
    Here is an example that demonstrates how to display annotations of PDF file in WinForms image viewer:
    /// <summary>
    /// Creates the PDF annotation tool.
    /// </summary>
    /// <param name="viewer">The image viewer.</param>
    public static Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool CreatePdfAnnotationTool(
        Vintasoft.Imaging.UI.ImageViewer viewer)
    {
        // create Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool
        Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool annotationTool = new Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool(true);
        annotationTool.InteractionMode = Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationInteractionMode.Markup;
    
        // create an application action executor
        Vintasoft.Imaging.Pdf.PdfActionCompositeExecutor applicationActionExecutor = 
            new Vintasoft.Imaging.Pdf.PdfActionCompositeExecutor();
        // add executor for PdfGotoAction to the application action executor
        applicationActionExecutor.Items.Add(new Vintasoft.Imaging.Pdf.UI.PdfGotoActionExecutor(viewer));
        // add executor for PdfNamedAction to the application action executor
        applicationActionExecutor.Items.Add(new Vintasoft.Imaging.Pdf.UI.PdfNamedActionExecutor(viewer));
        // add executor for PdfResetFormAction to the application action executor
        applicationActionExecutor.Items.Add(
            new Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationToolResetFormActionExecutor(annotationTool));
        // add executor for PdfAnnotationHideAction to the application action executor
        applicationActionExecutor.Items.Add(
            new Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationToolAnnotationHideActionExecutor(annotationTool));
        // add executor for PdfUriAction to the application action executor,
        // executor is located in WpfPdfDemosCommonCode
        //applicationActionExecutor.Items.Add(new PdfUriActionExecutor());// PdfDemosCommonCode
        // add executor for PdfLaunchAction to the application action executor,
        // executor is located in WpfPdfDemosCommonCode
        //applicationActionExecutor.Items.Add(new PdfLaunchActionExecutor());// PdfDemosCommonCode
        // add executor for PdfSubmitFormAction to the application action executor,
        // executor is located in WpfPdfDemosCommonCode
        //applicationActionExecutor.Items.Add(new PdfSubmitActionExecutor(viewer));// PdfDemosCommonCode
        // add the default executor (for PdfResetFormAction and PdfAnnotationHideAction)
        // to the application action executor
        applicationActionExecutor.Items.Add(new Vintasoft.Imaging.Pdf.PdfActionExecutor());
    
        // set the application action executor as action executor of PDF annotation tool
        annotationTool.ActionExecutor = applicationActionExecutor;
    
        return annotationTool;
    }
    
    ''' <summary>
    ''' Creates the PDF annotation tool.
    ''' </summary>
    ''' <param name="viewer">The image viewer.</param>
    Public Shared Function CreatePdfAnnotationTool(viewer As Vintasoft.Imaging.UI.ImageViewer) As Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool
        ' create Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool
        Dim annotationTool As New Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool(True)
        annotationTool.InteractionMode = Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationInteractionMode.Markup
    
        ' create an application action executor
        Dim applicationActionExecutor As New Vintasoft.Imaging.Pdf.PdfActionCompositeExecutor()
        ' add executor for PdfGotoAction to the application action executor
        applicationActionExecutor.Items.Add(New Vintasoft.Imaging.Pdf.UI.PdfGotoActionExecutor(viewer))
        ' add executor for PdfNamedAction to the application action executor
        applicationActionExecutor.Items.Add(New Vintasoft.Imaging.Pdf.UI.PdfNamedActionExecutor(viewer))
        ' add executor for PdfResetFormAction to the application action executor
        applicationActionExecutor.Items.Add(New Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationToolResetFormActionExecutor(annotationTool))
        ' add executor for PdfAnnotationHideAction to the application action executor
        applicationActionExecutor.Items.Add(New Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationToolAnnotationHideActionExecutor(annotationTool))
        ' add executor for PdfUriAction to the application action executor,
        ' executor is located in WpfPdfDemosCommonCode
        'applicationActionExecutor.Items.Add(new PdfUriActionExecutor());// PdfDemosCommonCode
        ' add executor for PdfLaunchAction to the application action executor,
        ' executor is located in WpfPdfDemosCommonCode
        'applicationActionExecutor.Items.Add(new PdfLaunchActionExecutor());// PdfDemosCommonCode
        ' add executor for PdfSubmitFormAction to the application action executor,
        ' executor is located in WpfPdfDemosCommonCode
        'applicationActionExecutor.Items.Add(new PdfSubmitActionExecutor(viewer));// PdfDemosCommonCode
        ' add the default executor (for PdfResetFormAction and PdfAnnotationHideAction)
        ' to the application action executor
        applicationActionExecutor.Items.Add(New Vintasoft.Imaging.Pdf.PdfActionExecutor())
    
        ' set the application action executor as action executor of PDF annotation tool
        annotationTool.ActionExecutor = applicationActionExecutor
    
        Return annotationTool
    End Function
    



    The PdfAnnotationTool class has the PdfAnnotationTool.ActionExecutor property, which is used for executing the PDF actions when the annotation events are triggered. By default the PdfAnnotationTool.ActionExecutor property represents a composite action executor, which can execute different types of actions. For example, the PdfJavaScriptActionExecutor class executes PDF JavaScript action, i.e. executes JavaScript code using JavaScript interpreter.

    Here is an example that demonstrates how to display annotations of PDF file in WinForms image viewer with enabled JavaScript:
    /// <summary>
    /// Creates the PDF annotation tool with JavaScript support.
    /// </summary>
    /// <param name="viewer">The image viewer.</param>
    public static Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool CreatePdfAnnotationToolWithJavaScriptSupport(Vintasoft.Imaging.UI.ImageViewer viewer)
    {
        // create PDF JavaScript application
        Vintasoft.Imaging.Pdf.UI.JavaScript.WinFormsPdfJsApp jsApp = 
            new Vintasoft.Imaging.Pdf.UI.JavaScript.WinFormsPdfJsApp();
        // add PDF documents, which are associated with images in viewer,
        // to the document set of PDF JavaScript application
        jsApp.RegisterImageViewer(viewer);
        // create PdfJavaScriptActionExecutor for PDF JavaScript application
        jsApp.ActionExecutor = new Vintasoft.Imaging.Pdf.JavaScript.PdfJavaScriptActionExecutor(
            jsApp, new Vintasoft.Imaging.Pdf.JavaScriptApi.PdfJsConsole());
    
        // create Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool
        Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool annotationTool = 
            new Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool(jsApp, true);
        annotationTool.InteractionMode = Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationInteractionMode.Markup;
    
        // create an application action executor
        Vintasoft.Imaging.Pdf.PdfActionCompositeExecutor applicationActionExecutor = 
            new Vintasoft.Imaging.Pdf.PdfActionCompositeExecutor();
        // add executor for PdfJavaScriptAction to the application action executor
        applicationActionExecutor.Items.Add(jsApp.ActionExecutor);
        // add executor for PdfGotoAction to the application action executor
        applicationActionExecutor.Items.Add(new Vintasoft.Imaging.Pdf.UI.PdfGotoActionExecutor(viewer));
        // add executor for PdfNamedAction to the application action executor
        applicationActionExecutor.Items.Add(new Vintasoft.Imaging.Pdf.UI.PdfNamedActionExecutor(viewer));
        // add executor for PdfResetFormAction to the application action executor
        applicationActionExecutor.Items.Add(
            new Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationToolResetFormActionExecutor(annotationTool));
        // add executor for PdfAnnotationHideAction to the application action executor
        applicationActionExecutor.Items.Add(
            new Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationToolAnnotationHideActionExecutor(annotationTool));
        // add executor for PdfUriAction to the application action executor,
        // executor is located in WpfPdfDemosCommonCode
        //applicationActionExecutor.Items.Add(new PdfUriActionExecutor());
        // add executor for PdfLaunchAction to the application action executor,
        // executor is located in WpfPdfDemosCommonCode
        //applicationActionExecutor.Items.Add(new PdfLaunchActionExecutor());
        // add executor for PdfSubmitFormAction to the application action executor,
        // executor is located in WpfPdfDemosCommonCode
        //applicationActionExecutor.Items.Add(new PdfSubmitActionExecutor(viewer));
        // add the default executor (for PdfResetFormAction and PdfAnnotationHideAction)
        // to the application action executor
        applicationActionExecutor.Items.Add(new Vintasoft.Imaging.Pdf.PdfActionExecutor());
    
        // set the application action executor as action executor of PDF annotation tool
        annotationTool.ActionExecutor = applicationActionExecutor;
    
        // create a document-level actions executor
        Vintasoft.Imaging.Pdf.PdfDocumentLevelActionsExecutor documentLevelActionsExecutor =
           new Vintasoft.Imaging.Pdf.PdfDocumentLevelActionsExecutor(jsApp);
        // set the application action executor as action executor of the document-level actions executor
        documentLevelActionsExecutor.ActionExecutor = applicationActionExecutor;
    
        return annotationTool;
    }
    
    ''' <summary>
    ''' Creates the PDF annotation tool with JavaScript support.
    ''' </summary>
    ''' <param name="viewer">The image viewer.</param>
    Public Shared Function CreatePdfAnnotationToolWithJavaScriptSupport(viewer As Vintasoft.Imaging.UI.ImageViewer) As Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool
        ' create PDF JavaScript application
        Dim jsApp As New Vintasoft.Imaging.Pdf.UI.JavaScript.WinFormsPdfJsApp()
        ' add PDF documents, which are associated with images in viewer,
        ' to the document set of PDF JavaScript application
        jsApp.RegisterImageViewer(viewer)
        ' create PdfJavaScriptActionExecutor for PDF JavaScript application
        jsApp.ActionExecutor = New Vintasoft.Imaging.Pdf.JavaScript.PdfJavaScriptActionExecutor(jsApp, New Vintasoft.Imaging.Pdf.JavaScriptApi.PdfJsConsole())
    
        ' create Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool
        Dim annotationTool As New Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationTool(jsApp, True)
        annotationTool.InteractionMode = Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationInteractionMode.Markup
    
        ' create an application action executor
        Dim applicationActionExecutor As New Vintasoft.Imaging.Pdf.PdfActionCompositeExecutor()
        ' add executor for PdfJavaScriptAction to the application action executor
        applicationActionExecutor.Items.Add(jsApp.ActionExecutor)
        ' add executor for PdfGotoAction to the application action executor
        applicationActionExecutor.Items.Add(New Vintasoft.Imaging.Pdf.UI.PdfGotoActionExecutor(viewer))
        ' add executor for PdfNamedAction to the application action executor
        applicationActionExecutor.Items.Add(New Vintasoft.Imaging.Pdf.UI.PdfNamedActionExecutor(viewer))
        ' add executor for PdfResetFormAction to the application action executor
        applicationActionExecutor.Items.Add(New Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationToolResetFormActionExecutor(annotationTool))
        ' add executor for PdfAnnotationHideAction to the application action executor
        applicationActionExecutor.Items.Add(New Vintasoft.Imaging.Pdf.UI.Annotations.PdfAnnotationToolAnnotationHideActionExecutor(annotationTool))
        ' add executor for PdfUriAction to the application action executor,
        ' executor is located in WpfPdfDemosCommonCode
        'applicationActionExecutor.Items.Add(new PdfUriActionExecutor());
        ' add executor for PdfLaunchAction to the application action executor,
        ' executor is located in WpfPdfDemosCommonCode
        'applicationActionExecutor.Items.Add(new PdfLaunchActionExecutor());
        ' add executor for PdfSubmitFormAction to the application action executor,
        ' executor is located in WpfPdfDemosCommonCode
        'applicationActionExecutor.Items.Add(new PdfSubmitActionExecutor(viewer));
        ' add the default executor (for PdfResetFormAction and PdfAnnotationHideAction)
        ' to the application action executor
        applicationActionExecutor.Items.Add(New Vintasoft.Imaging.Pdf.PdfActionExecutor())
    
        ' set the application action executor as action executor of PDF annotation tool
        annotationTool.ActionExecutor = applicationActionExecutor
    
        ' create a document-level actions executor
        Dim documentLevelActionsExecutor As New Vintasoft.Imaging.Pdf.PdfDocumentLevelActionsExecutor(jsApp)
        ' set the application action executor as action executor of the document-level actions executor
        documentLevelActionsExecutor.ActionExecutor = applicationActionExecutor
    
        Return annotationTool
    End Function
    



    The information on how to edit the annotations of PDF document in WinForms image viewer is available here: "Editing PDF annotations of PDF document in WinForms."