C#添加、获取、删除PDF附件实例代码

2.获取PDF附件

   2.1 获取文件附件

using Spire.Pdf;
using Spire.Pdf.Attachments;
using System;
using System.IO; 
namespace GetAttachment_PDF
{ 
 class Program 
 { 
 static void Main(string[] args) 
 { 
 //创建PDF文档，加载测试文件 
 PdfDocument pdf = new PdfDocument(); 
 pdf.LoadFromFile("Attachment1.pdf"); 
 
 //获取文档中的第一个文件附件 
 PdfAttachment attachment = pdf.Attachments[0]; 
 
 //获取该附件的信息 
 Console.WriteLine("Name: {0}", attachment.FileName); 
 Console.WriteLine("MimeType: {0}", attachment.MimeType); 
 Console.WriteLine("Description: {0}", attachment.Description); 
 Console.WriteLine("Creation Date: {0}", attachment.CreationDate); 
 Console.WriteLine("Modification Date: {0}", attachment.ModificationDate); 
 
 //将附件的数据写入到新文档 
 File.WriteAllBytes(attachment.FileName, attachment.Data); 
 Console.ReadKey(); 
 } 
 }
 }

测试结果：

2.2 获取注释附件

using Spire.Pdf;
using Spire.Pdf.Annotations;
using System.Collections.Generic;
using System.IO; 
namespace GetAttachment2
{ 
 class Program 
 { 
 static void Main(string[] args) 
 { 
 //加载PDF文档 
 PdfDocument pdf = new PdfDocument(); 
 pdf.LoadFromFile("Attachment2.pdf"); 
 
 //实例化一个list并将文档内所有页面的Attachment annotations添加到该list 
 List<PdfAttachmentAnnotationWidget> attaches = new List<PdfAttachmentAnnotationWidget>(); 
 foreach (PdfPageBase page in pdf.Pages) 
 { 
 foreach (PdfAnnotation annotation in page.AnnotationsWidget) 
 { 
 attaches.Add(annotation as PdfAttachmentAnnotationWidget); 
 } 
 } 
 //遍历list，将附件数据写入到新文档 
 for (int i = 0; i < attaches.Count; i++) 
 { 
 File.WriteAllBytes(attaches[i].FileName, attaches[i].Data); 
 } 
 } 
 }
 }

注释附件读取结果：

3.删除PDF附件

   3.1 删除文件附件

using Spire.Pdf; 
namespace DeleteAttachment_PDF
{ 
 class Program 
 { 
 static void Main(string[] args) 
 { 
 //加载PDF文档 
 PdfDocument pdf = new PdfDocument(); 
 pdf.LoadFromFile("Attachment1.pdf"); 
 
 //删除文档的所有文件附件 
 for (int i = 0; i < pdf.Attachments.Count; i++) 
 { 
 pdf.Attachments.RemoveAt(i); 
 } 
 
 //保存并打开文档 
 pdf.SaveToFile("Remove.pdf"); 
 System.Diagnostics.Process.Start("Remove.pdf"); 
 } 
 }
 }

   3.2 删除注释附件

using Spire.Pdf; 
namespace DeleteAttachment_PDF
{ 
 class Program 
 { 
 static void Main(string[] args) 
 { 
 //加载PDF文档 
 PdfDocument pdf = new PdfDocument(); 
 pdf.LoadFromFile("Attachment1.pdf"); 
 
 //删除文档的所有文件附件 
 for (int i = 0; i < pdf.Attachments.Count; i++) 
 { 
 pdf.Attachments.RemoveAt(i); 
 } 
 
 //保存并打开文档 
 pdf.SaveToFile("Remove.pdf"); 
 System.Diagnostics.Process.Start("Remove.pdf"); 
 } 
 }
 }
 3.2 删除注释附件

using Spire.Pdf;
using Spire.Pdf.Annotations; 
namespace DeleteAttachment2
 { 
 class Program 
 { 
 static void Main(string[] args) 
 { 
 //加载PDF文档 
 PdfDocument pdf = new PdfDocument(); 
 pdf.LoadFromFile("Attachment2.pdf"); 
 
 //删除文档的所有注释附件 
 foreach (PdfPageBase page in pdf.Pages) 
 { 
 for (int i = 0; i < page.AnnotationsWidget.Count; i++) 
 { 
 PdfAnnotation annotation = page.AnnotationsWidget[i] as PdfAttachmentAnnotationWidget; 
 page.AnnotationsWidget.Remove(annotation); 
 } 
 } 
 
 //保存并打开文档 
 pdf.SaveToFile("Result.pdf"); 
 System.Diagnostics.Process.Start("Result.pdf"); 
 } 
 }
 }								 
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