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,
Icon = IronPdf.Annotations.TextAnnotation.AnnotationIcon.Help,
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,
Icon = IronPdf.Annotations.TextAnnotation.AnnotationIcon.Help,
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,
Icon = IronPdf.Annotations.TextAnnotation.AnnotationIcon.Help,
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");
IRON VB CONVERTER ERROR developers@ironsoftware.com
Install-Package IronPdf
註釋
您的企業在年度 PDF 安全和合規訂閱上花費過多。考慮 IronSecureDoc,提供用於管理數位簽名、編輯、加密和保護等SaaS服務的解決方案,且僅需一次性付款。 立即試用