Spire.PDF 8.7.9已发布。该版本支持创建标签PDF 文件以及PDF/UA 文件。同时增强了PDF到SVG的转换功能。此外，还修复了应用程序在使用时间戳服务器签署 PDF 文档时抛出“System.NotSupportedException”等已知问题。详情请阅读以下内容。
新功能:
- 支持创建标签PDF 文件
- 支持创建 PDF/UA 文件
//Note:At present, in order to ensure the validity of the output tagged PDF file, it is necessary to add the valid license of Spire.PDF for .net to remove the red warning watermark.
//Spire.License.LicenseProvider.SetLicenseKey("valid license key");
//Create a pdf document
PdfDocument doc = new PdfDocument();
//Add page
doc.Pages.Add();
//Set tab order
doc.Pages[0].SetTabOrder(TabOrder.Structure);
//Create PdfTaggedContent
PdfTaggedContent taggedContent = new PdfTaggedContent(doc);
taggedContent.SetLanguage("en-US");
taggedContent.SetTitle("test");
//Set font
PdfTrueTypeFont font = new PdfTrueTypeFont(new System.Drawing.Font("Times New Roman", 10), true);
PdfSolidBrush brush = new PdfSolidBrush(Color.Black);
//Append elements
PdfStructureElement article = taggedContent.StructureTreeRoot.AppendChildElement(PdfStandardStructTypes.Document);
PdfStructureElement paragraph1 = article.AppendChildElement(PdfStandardStructTypes.Paragraph);
PdfStructureElement span1 = paragraph1.AppendChildElement(PdfStandardStructTypes.Span);
span1.BeginMarkedContent(doc.Pages[0]);
PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Justify);
doc.Pages[0].Canvas.DrawString("Spire.PDF for .NET is a professional PDF API applied to creating, writing, editing, handling and reading PDF files.",
font, brush, new Rectangle(40, 0, 480, 80), format);
span1.EndMarkedContent(doc.Pages[0]);
PdfStructureElement paragraph2 = article.AppendChildElement(PdfStandardStructTypes.Paragraph);
paragraph2.BeginMarkedContent(doc.Pages[0]); doc.Pages[0].Canvas.DrawString("Spire.PDF for .NET can be applied to easily convert Text, Image, SVG, HTML to PDF and convert PDF to Excel with C#/VB.NET in high quality.",
font, brush, new Rectangle(40, 80, 480, 60), format);
paragraph2.EndMarkedContent(doc.Pages[0]);
PdfStructureElement figure1 = article.AppendChildElement(PdfStandardStructTypes.Figure);
//Set Alternate text
figure1.Alt = "replacement text1";
figure1.BeginMarkedContent(doc.Pages[0], null);
PdfImage image = PdfImage.FromFile(@"E-logo.png");
doc.Pages[0].Canvas.DrawImage(image, new PointF(40, 200), new SizeF(100, 100));
figure1.EndMarkedContent(doc.Pages[0]);
PdfStructureElement figure2 = article.AppendChildElement(PdfStandardStructTypes.Figure);
//Set Alternate text
figure2.Alt = "replacement text2";
figure2.BeginMarkedContent(doc.Pages[0], null);
doc.Pages[0].Canvas.DrawRectangle(PdfPens.Black, new Rectangle(300, 200, 100, 100));
figure2.EndMarkedContent(doc.Pages[0]);
//Save to file
String result = "CreateTaggedFile_result.pdf";
doc.SaveToFile(result);
doc.Close();//Note:At present, in order to ensure the validity of the output PDF/UA file, it is necessary to add the valid license of Spire.PDF for .net to remove the red warning watermark.
//Spire.License.LicenseProvider.SetLicenseKey("valid license key");
//Create a pdf document
PdfDocument doc = new PdfDocument();
//Add page
doc.Pages.Add();
//Set tab order
doc.Pages[0].SetTabOrder(TabOrder.Structure);
//Create PdfTaggedContent
PdfTaggedContent taggedContent = new PdfTaggedContent(doc);
taggedContent.SetLanguage("en-US");
taggedContent.SetTitle("test");
//Set PDF/UA1 identification
taggedContent.SetPdfUA1Identification();
//Set font
PdfTrueTypeFont font = new PdfTrueTypeFont(new System.Drawing.Font("Times New Roman", 10), true);
PdfSolidBrush brush = new PdfSolidBrush(Color.Black);
//Append elements
PdfStructureElement article = taggedContent.StructureTreeRoot.AppendChildElement(PdfStandardStructTypes.Document);
PdfStructureElement paragraph1 = article.AppendChildElement(PdfStandardStructTypes.Paragraph);
PdfStructureElement span1 = paragraph1.AppendChildElement(PdfStandardStructTypes.Span);
span1.BeginMarkedContent(doc.Pages[0]);
PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Justify);
doc.Pages[0].Canvas.DrawString("Spire.PDF for .NET is a professional PDF API applied to creating, writing, editing, handling and reading PDF files.",
font, brush, new Rectangle(40, 0, 480, 80), format);
span1.EndMarkedContent(doc.Pages[0]);
PdfStructureElement paragraph2 = article.AppendChildElement(PdfStandardStructTypes.Paragraph);
paragraph2.BeginMarkedContent(doc.Pages[0]);
doc.Pages[0].Canvas.DrawString("Spire.PDF for .NET can be applied to easily convert Text, Image, SVG, HTML to PDF and convert PDF to Excel with C#/VB.NET in high quality.",
font, brush, new Rectangle(40, 80, 480, 60), format);
paragraph2.EndMarkedContent(doc.Pages[0]);
PdfStructureElement figure1 = article.AppendChildElement(PdfStandardStructTypes.Figure);
//Set Alternate text
figure1.Alt = "replacement text1";
figure1.BeginMarkedContent(doc.Pages[0], null);
PdfImage image = PdfImage.FromFile(@"E-logo.png");
doc.Pages[0].Canvas.DrawImage(image, new PointF(40, 200), new SizeF(100, 100));
figure1.EndMarkedContent(doc.Pages[0]);
PdfStructureElement figure2 = article.AppendChildElement(PdfStandardStructTypes.Figure);
//Set Alternate text
figure2.Alt = "replacement text2";
figure2.BeginMarkedContent(doc.Pages[0], null);
doc.Pages[0].Canvas.DrawRectangle(PdfPens.Black, new Rectangle(300, 200, 100, 100));
figure2.EndMarkedContent(doc.Pages[0]);
//Save to file
String result = "CreatePDFUAFile_result.pdf";
doc.SaveToFile(result);
doc.Close();问题修复:
- 修复了应用程序在使用时间戳服务器签署 PDF 文档时抛出“System.NotSupportedException”的问题。
- 修复了PDF转excel文件后内容格式不正确的问题。
- 修复了应用程序在将 PDF 转换为 SVG 时抛出“System.NullReferenceException”的问题。
- 修复了打印PDF文件后，印章内容格式不正确的问题。
- 优化了查找 PDF 文件文本时的耗时问题。
- 修复了 ReplaceAllText() 函数不生效的问题。
- 优化 了DrawString() 方法以绘制 Html 字符串。
- 修复了合并 PDF 文件时应用程序抛出“System.IndexOutOfRangeException”的问题。
- 修复了 RemoveCustomProperty() 函数效果不正确的问题。
- 修复了应用程序在压缩 PDF 图像时抛出“System.OutOfMemoryException”的问题。
- 修复了从 u3d 文件转换后，无法打开输出 PDF 的问题。
- 修复了提取的图片大小不正确的问题。
- 修复了PDF转图片后，PDF文件二维码不正确的问题。
- 修复了从 PDF/A 文件中提取文本时，应用程序抛出“System.NullReferenceException”的问题。
- 修复了无法从 PDF 文件中找到文本的问题。
- 修复了应用程序在加载并直接保存 PDF 文件后抛出“Invalid year in date string”的问题。
- 修复了打印 PDF 文件后内容丢失的问题。
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