C#-添加、获取、删除PDF附件

1/1C#-添加、获取、删除PDF附件C#/VB.NET如何添加、获取、删除PDF附件概述附件，指随同文件发出的有关文件或物品。

在PDF文档中，我们可以添加同类型的或其他类型的文档作为附件内容，而PDF中附件也可以分为两种存在形式，一种是附件以普通文件形式存在，另一种是以注释的形式存在。

在下面的示例中介绍了如何分别添加以上两种形式的PDF附件。

此外，根据PDF附件的不同添加方式，我们在获取PDF附件信息或删除PDF附件时，也可以分情况来执行操作。

要点索引1.添加PDF附件1.1以普通文档形式添加附件1.2以文档注释形式添加附件2.获取PDF附件2.1获取文件附件2.2获取注释附件3.删除PDF附件3.1删除文件附件3.2删除注释附件工具使用Spire.PDFfor.NET4.0示例操作1.添加PDF附件1.1以普通文档形式添加附件C#usingSpire.Pdf;usingSpire.Pdf.Attachments;namespaceAddAttachment_PDF{classProgram{staticvoidMain(string[]args){//创建一个PdfDocument类对象，加载测试文档}测试VB.NImpoImpoNamePdfpdf//初Pdf//将pdf//保pdfSys}}试结果：

NETortsSpire.PortsSpire.PespaceAddAtClassProgrPrivateDimpdfDocumentpdf.LoadFromFil初始化PdfAttaAttachmenta将文档添加到原.Attachments保存并打开文档.SaveToFiletem.DiagnostPdfPdf.Attachmenttachment_PDFrameSharedSubmpdfAsPdfDf.LoadFromFilf=newPdfDle(sample.pachment类实例attachment=原PDF文档的附s.Add(attach档(Attachmenttics.ProcessntsFMain(ByValDocument=Nle(sample.pDocument();pdf);例，加载需要=newPdfAtt附件集合中hment);t1.pdf);s.Start(AttargsAsStrNewPdfDocumpdf)附加的文档achment(Newachment1.pdfring())ment()w.pdf);f);DimattachmentAsPdfAttachment=NewPdfAttachment(New.pdf)pdf.Attachments.Add(attachment)pdf.SaveToFile(Attachment1.pdf)System.Diagnostics.Process.Start(Attachment1.pdf)EndSubEndClassEndNamespace1.2以文档注释形式添加附件C#usingSpire.Pdf;usingSpire.Pdf.Annotations;usingSpire.Pdf.Graphics;usingSystem;usingSystem.Drawing;usingSystem.IO;namespaceAddAttachment2{classProgram{staticvoidMain(string[]args){//创建一个PdfDocument类对象，加载测试文档PdfDocumentdoc=newPdfDocument(sample.pdf);//给添加一个新页面到文档PdfPageBasepage=doc.Pages.Add();//添加文本到页面，并设置文本格式（字体、题号、字体粗细、颜色、文本位置等）PdfTrueTypeFontfont1=newPdfTrueTypeFont(newFont(Arial,16f,System.Drawing.FontStyle.Bold));page.Canvas.DrawString(Attachments:,font1,PdfBrushes.CornflowerBlue,newPoint(50,50));//将文档作为注释添加到页面PdfTrueTypeFontfont2=newPdfTrueTypeFont(newFont(Arial,12f,System.Drawing.FontStyle.Bold));PointFlocation=newPointF(52,80);//设置注释标签，标签内容为作为附件的文档Stringlabel=sample.docx;byte[]data=File.ReadAllBytes(sample.docx);SizeFsize=font2.MeasureString(label);fontsam}测试VB.NImpoImpoImpoImpoImpoImpoName//设Recpagbout2.Height);Pdfmple.docx,annannannann(pa//保docSys}}试结果：

NETortsSpire.PortsSpire.PortsSpire.PortsSystemortsSystem.ortsSystem.espaceAddAt设置注释位置、tangleFboune.Canvas.Drands=newReAttachmentAndata);otation1.Colotation1.Flaotation1.Icootation1.TexgeasPdfNew保存并打开文档.SaveToFiletem.DiagnostPdfPdf.AnnotatioPdf.GraphicsDrawingIOttachment2、大小、颜色nds=newReawString(labectangleF(bonnotationanlor=Color.ags=PdfAnnon=PdfAttaxt=samplewPage).Annot档(Attachmenttics.Processons色、标签类型以ectangleF(lobel,font2,ounds.Rightnnotation1=Purple;notationFlagachmentIcon.e.docx;tations.Add(t2.pdf);s.Start(Att以及显示文本等cation,sizePdfBrushes.M+3,bounds.newPdfAttags.NoZoom;Graph;annotation1)achment2.pdf等e);MediumPurple.Top,font2.achmentAnnot);f);e,bounds);Height/2,tation(boundds,ClassProgramPrivateSharedSubMain(ByValargsAsString())DimdocAsPdfDocument=NewPdfDocument(sample.pdf)DimpageAsPdfPageBase=doc.Pages.Add()Dimfont1AsPdfTrueTypeFont=NewPdfTrueTypeFont(NewFont(Arial,16F,System.Drawing.FontStyle.Bold))page.Canvas.DrawString(Attachments:,font1,PdfBrushes.CornflowerBlue,NewPoint(50,50))Dimfont2AsPdfTrueTypeFont=NewPdfTrueTypeFont(NewFont(Arial,12F,System.Drawing.FontStyle.Bold))DimlocationAsPointF=NewPointF(52,80)DimlabelAsString=sample.docxDimdataAsByte()=File.ReadAllBytes(sample.docx)DimsizeAsSizeF=font2.MeasureString(label)DimboundsAsRectangleF=NewRectangleF(location,size)page.Canvas.DrawString(label,font2,PdfBrushes.MediumPurple,bounds)bounds=NewRectangleF(bounds.Right+3,bounds.Top,font2.Height/2,font2.Height)Dimannotation1AsPdfAttachmentAnnotation=NewPdfAttachmentAnnotation(bounds,sample.docx,data)annotation1.Color=Color.Purpleannotation1.Flags=PdfAnnotationFlags.NoZoomannotation1.Icon=PdfAttachmentIcon.Graphannotation1.Text=sample.docx(TryCast(page,PdfNewPage)).Annotations.Add(annotation1)doc.SaveToFile(Attachment2.pdf)System.Diagnostics.Process.Start(Attachment2.pdf)EndSubEndClassEndNamespace2.获取PDF附件2.1获取文件附件C#usingSpire.Pdf;usingSpire.Pdf.Attachments;usingSystem;usingSystem.IO;namespaceGetAttachment_PDF{classProgram{staticvoidMain(string[]args){//创建PDF文档，加载测试文件PdfDocumentpdf=newPdfDocument();pdf.LoadFromFile(Attachment1.pdf);//获取文档中的第一个文件附件PdfAttachmentattachment=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(CreationDate:{0},attachment.CreationDate);Console.WriteLine(ModificationDate:{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：

VB.NImpoImpoImpoImpoNameNETortsSpire.PortsSpire.PortsSystemortsSystem.espaceGetAtClassProgrPrivateDimpdfDimConConConConConFilConEndSubEndClassPdfPdf.AttachmenIOttachment_PDFrameSharedSubmpdfAsPdfDf.LoadFromFilmattachmentnsole.WriteLinsole.WriteLinsole.WriteLinsole.WriteLinsole.WriteLile.WriteAllBynsole.ReadKeybntsFMain(ByValDocument=Nle(AttachmeAsPdfAttacine(Name:{ine(MimeTypine(Descripine(Creatioine(Modificytes(attachmy()argsAsStrNewPdfDocument1.pdf)chment=pdf{0},attachpe:{0},atption:{0},onDate:{0}cationDate:ment.FileNamring())ment()f.Attachmenthment.FileNattachment.Mi,attachment},attachme:{0},attame,attachmets(0)ame)imeType)t.Descriptioent.Creationachment.Modient.Data)on)nDate)ificationDate)EndNamespace2.2获取注释附件C#usingSpire.Pdf;usingSpire.Pdf.Annotations;usingSystem.Collections.Generic;usingSystem.IO;namespaceGetAttachment2{classProgram{staticvoidMain(string[]args){//加载PDF文档PdfDocumentpdf=newPdfDocument();pdf.LoadFromFile(Attachment2.pdf);//实例化一个list并将文档内所有页面的Attachmentannotations添加到该listListPdfAttachmentAnnotationWidgetattaches=newListPdfAttachmentAnnotationWidget();foreach(PdfPageBasepageinpdf.Pages){foreach(PdfAnnotationannotationinpage.AnnotationsWidget){attaches.Add(annotationasPdfAttachmentAnnotationWidget);}}//遍历list，将附件数据写入到新文档for(inti=0;iattaches.Count;i++){File.WriteAllBytes(attaches[i].FileName,attaches[i].Data);}}}}测试文档：

VB.NImpoImpoImpoImpoNamePdfANETortsSpire.PortsSpire.PortsSystem.ortsSystem.espaceGetAtClassProgrPrivateDimpdfDimAttachmentAnForNexForNexEndSubPdfPdf.AnnotatioCollectionsIOttachment2rameSharedSubmpdfAsPdfDf.LoadFromFilmattachesAsnnotationWidgrEachpageAForEachanattacheNextxtriAsIntegeFile.WriteAxtbons.GenericMain(ByValDocument=Nle(AttachmesList(Ofget)()AsPdfPageBannotationAses.Add(TryCaer=0ToatAllBytes(attargsAsStrNewPdfDocument2.pdf)PdfAttachmaseInpdf.PsPdfAnnotatast(annotatittaches.Countaches(i).Firing())ment()mentAnnotatiPagestionInpageion,PdfAttant-1ileName,attionWidget)e.AnnotationachmentAnnottaches(i).Da=NewLisnsWidgettationWidgetata)st(Of))EndClassEndNamespace3.删除PDF附件3.1删除文件附件C#usingSpire.Pdf;namespaceDeleteAttachment_PDF{classProgram{staticvoidMain(string[]args){//加载PDF文档PdfDocumentpdf=newPdfDocument();pdf.LoadFromFile(Attachment1.pdf);//删除文档的所有文件附件for(inti=0;ipdf.Attachments.Count;i++){pdf.Attachments.RemoveAt(i);}//保存并打开文档pdf.SaveToFile(Remove.pdf);System.Diagnostics.Process.Start(Remove.pdf);}}}VB.NETImportsSpire.PdfNamespaceDeleteAttachment_PDFClassProgramPrivateSharedSubMain(ByValargsAsString())DimpdfAsPdfDocument=NewPdfDocument()pdf.LoadFromFile(Attachment1.pdf)ForiAsInteger=0Topdf.Attachments.Count-1pdf.Attachments.RemoveAt(i)Nextpdf.SaveToFile(Remove.pdf)System.Diagnostics.Process.Start(Remove.pdf)EndSubEndClassEndNamespace3.2删除注释附件C#usingSpire.Pdf;usingSpire.Pdf.Annotations;namespaceDeleteAttachment2{classProgram{staticvoidMain(string[]args){//加载PDF文档PdfDocumentpdf=newPdfDocument();pdf.LoadFromFile(Attachment2.pdf);//删除文档的所有注释附件foreach(PdfPageBasepageinpdf.Pages){for(inti=0;ipage.AnnotationsWidget.Count;i++){PdfAnno