Annotations

VBC#

using IronPdf;

// Create a new PDF or load and edit an existing document.
var pdf = PdfDocument.FromFile("existing.pdf");

int pageIndex1 = 0;
int pageIndex2 = 1;

// Create a PDF annotation object on a specified page index
var annotation1 = new IronPdf.Annotations.TextAnnotation(pageIndex1)
{
    Title = "This is the major title 1",
    Contents = "This is the long 'sticky note' comment 1st content...",
    X = 150,
    Y = 200,
    Width = 200,
    Height = 50,
    Opacity = 0.9,
    Printable = false,
    Hidden = false,
    OpenByDefault = true,
    ReadOnly = false,
    Rotatable = true
};

var annotation2 = new IronPdf.Annotations.TextAnnotation(pageIndex2)
{
    Title = "This is the major title 2",
    Contents = "This is the long 'sticky note' comment 2nd content...",
    X = 100,
    Y = 150,
    Width = 250,
    Height = 150,
    Opacity = 0.9,
    Printable = false,
    Hidden = false,
    OpenByDefault = true,
    ReadOnly = false,
    Rotatable = true
};

var annotation3 = new IronPdf.Annotations.TextAnnotation(pageIndex2)
{
    Title = "This is the major title 3",
    Contents = "This is the long 'sticky note' comment 3rd content...",
    X = 200,
    Y = 150,
    Width = 150,
    Height = 50,
    Opacity = 0.9,
    Printable = false,
    Hidden = false,
    OpenByDefault = true,
    ReadOnly = false,
    Rotatable = true
};

// Add the annotation "sticky note" within any new or existing PDF.
pdf.Annotations.Add(annotation1); // annotation1 index is 0.
pdf.Annotations.Add(annotation2); // annotation2 index is 1.
pdf.Annotations.Add(annotation3); // annotation3 index is 2.

// Remove a single annotation with specified index
pdf.Annotations.RemoveAt(1); // annotation2 is removed, annotation3 index becomes 1.

// Remove all annotaions on a specified page
pdf.Annotations.RemoveAllAnnotationsForPage(0); // remove all annotaion on page 1, annotation3 index becomes 0.

// Edit a single annotation with specified index
pdf.Annotations[0].Title = "new title for annotation 3";
pdf.Annotations[0].Contents = "This is new comment content of annotation 3";

// Remove all annotaions on the document
pdf.Annotations.Clear();

pdf.SaveAs("existing.pdf");

Imports IronPdf

' Create a new PDF or load and edit an existing document.
Dim pdf = PdfDocument.FromFile("existing.pdf")

Dim pageIndex1 As Integer = 0
Dim pageIndex2 As Integer = 1

' Create a PDF annotation object on a specified page index
Dim annotation1 = New IronPdf.Annotations.TextAnnotation(pageIndex1) With {
    .Title = "This is the major title 1",
    .Contents = "This is the long 'sticky note' comment 1st content...",
    .X = 150,
    .Y = 200,
    .Width = 200,
    .Height = 50,
    .Opacity = 0.9,
    .Printable = False,
    .Hidden = False,
    .OpenByDefault = True,
    .ReadOnly = False,
    .Rotatable = True
}

Dim annotation2 = New IronPdf.Annotations.TextAnnotation(pageIndex2) With {
    .Title = "This is the major title 2",
    .Contents = "This is the long 'sticky note' comment 2nd content...",
    .X = 100,
    .Y = 150,
    .Width = 250,
    .Height = 150,
    .Opacity = 0.9,
    .Printable = False,
    .Hidden = False,
    .OpenByDefault = True,
    .ReadOnly = False,
    .Rotatable = True
}

Dim annotation3 = New IronPdf.Annotations.TextAnnotation(pageIndex2) With {
    .Title = "This is the major title 3",
    .Contents = "This is the long 'sticky note' comment 3rd content...",
    .X = 200,
    .Y = 150,
    .Width = 150,
    .Height = 50,
    .Opacity = 0.9,
    .Printable = False,
    .Hidden = False,
    .OpenByDefault = True,
    .ReadOnly = False,
    .Rotatable = True
}

' Add the annotation "sticky note" within any new or existing PDF.
pdf.Annotations.Add(annotation1) ' annotation1 index is 0.
pdf.Annotations.Add(annotation2) ' annotation2 index is 1.
pdf.Annotations.Add(annotation3) ' annotation3 index is 2.

' Remove a single annotation with specified index
pdf.Annotations.RemoveAt(1) ' annotation2 is removed, annotation3 index becomes 1.

' Remove all annotations on a specified page
pdf.Annotations.RemoveAllAnnotationsForPage(0) ' remove all annotations on page 1, annotation3 index becomes 0.

' Edit a single annotation with specified index
pdf.Annotations(0).Title = "new title for annotation 3"
pdf.Annotations(0).Contents = "This is new comment content of annotation 3"

' Remove all annotations on the document
pdf.Annotations.Clear()

pdf.SaveAs("existing.pdf")

PM > Install-Package IronPdf

Install-Package IronPdf

Annotations

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Les annotations PDF permettent d'ajouter des commentaires similaires à des 'post-it' aux pages PDF. La méthode IronPdf.PdfDocument.AddTextAnnotation et la classe PdfDocument.TextAnnotation permettent d'ajouter des annotations de manière programmatique. Les fonctionnalités avancées des annotations textuelles prises en charge incluent la coloration, la taille, l'opacité, les icônes et l'édition.

Comment ajouter des annotations PDF en .NET

Installer la bibliothèque C# pour ajouter des annotations au PDF.
Ouvrez un fichier PDF existant ou générez-en un nouveau dans .NET.
Créez une classe TextAnnotation et personnalisez ses propriétés.
Utilisez la méthode AddTextAnnotation pour ajouter l'annotation nouvellement créée au PDF.
Exportez le PDF modifié dans le dossier souhaité.

Découvrez comment ajouter des annotations aux PDF avec IronPDF

Voir sur GitHub