如何查看pdf的源代码(PDF处理控件Spire.PDF热门问题解答)

为方便使用者快速掌握和了解Spire.PDF,下面小编就试用者试用过程中常见的一系列问题进行了汇总和整理,希望能帮到大家!Spire.PDF for .NET官方最新版免费下载试用,历史版本下载,在线文档和帮助文件下载-慧都网,我来为大家科普一下关于如何查看pdf的源代码?以下内容希望对你有帮助!

如何查看pdf的源代码(PDF处理控件Spire.PDF热门问题解答)

如何查看pdf的源代码

为方便使用者快速掌握和了解Spire.PDF,下面小编就试用者试用过程中常见的一系列问题进行了汇总和整理,希望能帮到大家!Spire.PDF for .NET官方最新版免费下载试用,历史版本下载,在线文档和帮助文件下载-慧都网

(1)如何将 HTML 代码转换为 PDF?

A:Spire.PDF 无法加载包含 html 代码的字符串。但是 Spire.Doc 可以加载它并且 Spire.Doc 支持 PDF 格式。所以你可以使用 Spire.Doc 来完成这项工作。完整代码:

string htmlstring = "<!DOCTYPE html><html><body><h1>Header 1</h1><p>First paragraph</p></body></html>"; Document doc = new Document(); Section sec = doc.AddSection(); Paragraph para = sec.AddParagraph(); //add html code to document para.AppendHTML(htmlstring); //save document as PDF format doc.SaveToFile("result.pdf", FileFormat.PDF);

(2)如何在表格的单元格中嵌入另一个表格?

A:表格是一个更简单的网格。在网格中,您可以操作每个单元格,为每个单元格设置不同的样式并嵌入另一个网格。所以你可以使用网格来完成这项工作。完整代码:

PdfDocument document = new PdfDocument(); PdfPageBase page = document.Pages.Add(PdfPageSize.A4); PdfGrid grid = new PdfGrid(); grid.Columns.Add(1); grid.Columns[0].Width = page.Canvas.ClientSize.Width; PdfGridRow row0 = grid.Rows.Add(); row0.Cells[0].Value = "This is the first row."; row0.Cells[0].StringFormat = new PdfStringFormat(PdfTextAlignment.Center, PdfVerticalAlignment.Middle); PdfGridRow row1 = grid.Rows.Add(); PdfLayoutResult result=grid.Draw(page, new PointF(0, 20)); PdfGrid grid2 = new PdfGrid(); grid2.Columns.Add(2); PdfGridRow newrow = grid2.Rows.Add(); grid2.Columns[0].Width = grid.Columns[0].Width / 2; grid2.Columns[1].Width = grid.Columns[0].Width / 2; newrow.Cells[0].Value = "This is row two column one."; newrow.Cells[0].StringFormat = new PdfStringFormat(PdfTextAlignment.Center, PdfVerticalAlignment.Middle); newrow.Cells[1].Value = "This is row two column two."; newrow.Cells[1].StringFormat = new PdfStringFormat(PdfTextAlignment.Center, PdfVerticalAlignment.Middle); //assign grid2 to row1 row1.Cells[0].Value = grid2; //drwa grid2 result = grid2.Draw(page, new PointF(0, result.Bounds.Location.Y result.Bounds.Height)); document.SaveToFile("result.pdf");

(3)如何合并网格中的单元格?

A:Spire.PDF 为您提供名为 RowSpan 和 ColumnSpan 的属性来合并单元格。完整代码:

PdfDocument doc = new PdfDocument(); PdfPageBase page = doc.Pages.Add(); PdfGrid grid = new PdfGrid(); grid.Columns.Add(5); float width = page.Canvas.ClientSize.Width - (grid.Columns.Count 1); for (int i = 0; i < grid.Columns.Count; i ) { grid.Columns[i].Width = width * 0.20f; } PdfGridRow row0 = grid.Rows.Add(); PdfGridRow row1 = grid.Rows.Add(); row0.Style.Font = new PdfTrueTypeFont(new Font("Arial", 16f, FontStyle.Bold), true); row1.Style.Font = new PdfTrueTypeFont(new Font("Arial", 16f, FontStyle.Italic), true); row0.Cells[0].Value = "Corporation"; //merge with the downside cell row0.Cells[0].RowSpan = 2; row0.Cells[1].Value = "B&K Undersea Photo"; row0.Cells[1].StringFormat = new PdfStringFormat(PdfTextAlignment.Center, PdfVerticalAlignment.Middle); //merge with the right cell row0.Cells[1].ColumnSpan = 3; row0.Cells[4].Value = "World"; row0.Cells[4].Style.Font = new PdfTrueTypeFont(new Font("Arial", 10f, FontStyle.Bold | FontStyle.Italic), true); row0.Cells[4].StringFormat = new PdfStringFormat(PdfTextAlignment.Center, PdfVerticalAlignment.Middle); row0.Cells[4].Style.BackgroundBrush = PdfBrushes.LightGreen; row1.Cells[1].Value = "Diving International Unlimited"; row1.Cells[1].StringFormat = new PdfStringFormat(PdfTextAlignment.Center, PdfVerticalAlignment.Middle); row1.Cells[1].ColumnSpan = 4; grid.Draw(page, new PointF(0, 0)); doc.SaveToFile("result.pdf");

(4)如何在 PDF 文件中添加签名?

A:首先,使用类 PdfCertificate 创建一个证书实例。证书实例将用于创建 PdfSignature 实例。然后使用类 PdfSignature 创建一个签名实例。并且您需要设置签名实例的属性。完整代码:

PdfDocument doc = new PdfDocument(); doc.LoadFromFile("sample.pdf"); PdfCertificate cert = new PdfCertificate("Demo.pfx", "e-iceblue"); //add signature to every page of PDF file foreach (PdfPageBase page in doc.Pages) { PdfSignature signature = new PdfSignature(page.Document, page, cert, "demo"); signature.ContactInfo = "Harry"; signature.Certificated = true; signature.DocumentPermissions = PdfCertificationFlags.AllowFormFill; } doc.SaveToFile("result.pdf");

(5)如何重新排列 PDF 文件的页面?

A : 请调用 ReArrange 方法,将一个 int 数组作为参数,int 数组表示页面的新顺序。完整代码:

PdfDocument document = new PdfDocument(); //sample.pdf has four pages document.LoadFromFile("sample.pdf"); //rearrange the pages of the PDF file int[] range = new int[] { 0, 2, 1, 3 }; document.Pages.ReArrange(range); document.SaveToFile("result.pdf");

(6)如何添加图片水印?

A : Spire.PDF 不直接支持图片水印。但是您可以将图像设置为 BackgroundImage。如果图像足够大,BackgroundImage 就像图像水印一样。完整代码:

PdfDocument document = new PdfDocument(); PdfPageBase page = document.Pages.Add(PdfPageSize.A4); page.Canvas.DrawString("This is a demo about image watermark!", new PdfFont(PdfFontFamily.Helvetica, 25f), new PdfSolidBrush(Color.Green), 10, 40); //set image as BackgroundImage to make image watermark Image img = Image.FromFile("scene.bmp"); page.BackgroundImage = img; document.SaveToFile("result.pdf");

(7)如何在所有页面上重复标题?

A : PdfDocumentTemplate 中的内容将适用于 PDF 文件的每一页。您所要做的就是创建一个将标题添加到 PdfDocumentTemplate 的方法。然后标题将添加到每个页面。完整代码:

static void Main(string[] args) { PdfDocument doc = new PdfDocument(); PdfUnitConvertor unitCvtr = new PdfUnitConvertor(); PdfMargins margin = new PdfMargins(); margin.Top = unitCvtr.ConvertUnits(3.0f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point); margin.Bottom = margin.Top; margin.Left = unitCvtr.ConvertUnits(3.17f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point); margin.Right = margin.Left; // create three page PdfPageBase page = doc.Pages.Add(PdfPageSize.A4, margin); page = doc.Pages.Add(PdfPageSize.A4, margin); page = doc.Pages.Add(PdfPageSize.A4, margin); //apply template SetDocumentTemplate(doc, PdfPageSize.A4, margin); doc.SaveToFile("result.pdf"); } //method to add header to every page private static void SetDocumentTemplate(PdfDocument doc, SizeF pageSize, PdfMargins margin) { PdfPageTemplateElement leftSpace = new PdfPageTemplateElement(margin.Left, pageSize.Height); doc.Template.Left = leftSpace; PdfPageTemplateElement topSpace = new PdfPageTemplateElement(pageSize.Width, margin.Top); topSpace.Foreground = true; doc.Template.Top = topSpace; //draw header label PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", 9f, FontStyle.Italic)); PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Right); String label = "Demo about Header Repeating"; //set the header style SizeF size = font.MeasureString(label, format); float y = topSpace.Height - font.Height - 40; PdfPen pen = new PdfPen(Color.Black, 0.75f); topSpace.Graphics.SetTransparency(0.5f); topSpace.Graphics.DrawLine(pen, margin.Left - 30, y, pageSize.Width - margin.Right 30, y); y = y - 1 - size.Height; topSpace.Graphics.DrawString(label, font, PdfBrushes.Black, pageSize.Width - margin.Right, y, format); PdfPageTemplateElement rightSpace = new PdfPageTemplateElement(margin.Right, pageSize.Height); doc.Template.Right = rightSpace; PdfPageTemplateElement bottomSpace = new PdfPageTemplateElement(pageSize.Width, margin.Bottom); bottomSpace.Foreground = true; doc.Template.Bottom = bottomSpace; }

若您还有其他疑问,可在评论区留言~~小编看到了第一时间给大家回复哟~~

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