如何使用iTextSharp为页面添加边框
本文关键字：添加 边框 何使用 iTextSharp | 更新日期: 2023-09-27 17:58:59
是否可以使用iTextSharp为PDF文档中的页面添加边框？我从头开始生成PDF文件，所以我不需要为现有文档添加边框。
以下是我的代码示例：
Document pdfDocument = new Document(PageSize.LETTER);
Font headerFont = new Font(baseFont, 13);
Font font = new Font(baseFont, 10);
PdfWriter writer = PdfWriter.GetInstance(pdfDocument,
new FileStream(fileName, FileMode.Create));
pdfDocument.Open();
//I add IElements here.
pdfDocument.Close();
以下是C#中的一个答案（改编自Mark Storer）。这个例子使用页面的边距来绘制边框，我有时会发现这对调试页面布局很有用。
public override void OnEndPage(PdfWriter writer, Document document)
{
base.OnEndPage(writer, document);
var content = writer.DirectContent;
var pageBorderRect = new Rectangle(document.PageSize);
pageBorderRect.Left += document.LeftMargin;
pageBorderRect.Right -= document.RightMargin;
pageBorderRect.Top -= document.TopMargin;
pageBorderRect.Bottom += document.BottomMargin;
content.SetColorStroke(BaseColor.RED);
content.Rectangle(pageBorderRect.Left, pageBorderRect.Bottom, pageBorderRect.Width, pageBorderRect.Height);
content.Stroke();
}
我建议您在生成当前页面时获取其直接内容，并使用PdfContentByte获取边框。
您可能需要一个PdfPageEventHelper派生的类，它在onEndPage事件中进行绘图。
您可以通过document参数的getPageSize()查询当前页面大小，并使用它（稍微调整一下）绘制边框。假设您使用的是iTextSharp，那么您可能有一个PageSize属性而不是"get"方法。
类似于：
public void onEndPage(PdfWriter writer, Document doc) {
PdfContentByte content = writer.getDirectContent();
Rectangle pageRect = doc.getPageSize();
pageRect.setLeft( pageRect.getLeft() + 10 );
pageRect.setRight( pageRect.getRight() - 10 );
pageRect.setTop( pageRect.getTop() - 10 );
pageRect.setBottom( pageRect.getBottom() + 10 );
content.setColorStroke( Color.red );
content.rectangle(pageRect.getLeft(), pageRect.getBottom(), pageRect.getWidth(), pageRect.getHeight());
content.stroke();
}
请注意，您实际上可以将Rectangle传递到content.rectangle()中，此时该矩形的边界&使用填充设置。我觉得这可能有点令人困惑，所以没有这样编码。
PdfContentByte content = pdfwrite1.DirectContent;
Rectangle rectangle = new Rectangle(doc.PageSize);
rectangle.Left += doc.LeftMargin;
rectangle.Right -= doc.RightMargin;
rectangle.Top -= doc.TopMargin;
rectangle.Bottom += doc.BottomMargin;
content.SetColorStroke(BaseColor.BLACK);
content.Rectangle(rectangle.Left, rectangle.Bottom, rectangle.Width, rectangle.Height);
content.Stroke();
我能够为现有的PDF 添加红色边框
public void createPdf(PdfReader pdfReader)
throws DocumentException, IOException {
String userDir = System.getProperty("user.dir");
System.out.println("userDir = " + userDir);
RESULT = userDir + "/work/"+"sample.pdf";
// step 1
Document document = new Document();
// step 2
PdfCopy copy = new PdfCopy(document, new FileOutputStream(RESULT));
// step 3
document.open();
int noOfPages = pdfReader.getNumberOfPages();
for (int page = 0; page < noOfPages; ) {
if(page==0) {
PdfImportedPage immportedPage = copy.getImportedPage(pdfReader, ++page);
PageStamp stamp = copy.createPageStamp(immportedPage);
PdfContentByte canvas = stamp.getOverContent();
drawPageBorder(canvas, PageSize.A4.getWidth(), PageSize.A4.getHeight());
stamp.alterContents();
copy.addPage(immportedPage);
} else {
copy.addPage(copy.getImportedPage(pdfReader, ++page));
}
}
copy.freeReader(pdfReader);
pdfReader.close();
// step 4
document.close();
}
public void drawPageBorder(PdfContentByte content, float width, float height) {
content.saveState();
PdfGState state = new PdfGState();
state.setFillOpacity(0.0f);
content.setGState(state);
content.setColorStroke(BaseColor.RED);
content.setLineWidth(6);
content.rectangle(5, 5, width, height);
content.fillStroke();
content.restoreState();
}
protected void GenerateReport(object sender, EventArgs e)
{
Document document = new Document(PageSize.A4, 88f, 88f, 10f, 10f);
Font NormalFont = FontFactory.GetFont("Arial", 12, Font.NORMAL, Color.BLACK);
using (System.IO.MemoryStream memoryStream = new System.IO.MemoryStream())
{
PdfWriter writer = PdfWriter.GetInstance(document, memoryStream);
Phrase phrase = null;
PdfPCell cell = null;
PdfPTable table = null;
document.Open();
//Header Table
table = new PdfPTable(1);
table.TotalWidth = 400f;
table.LockedWidth = true;
table.SetWidths(new float[] { 1f });
//Company Name and Address
phrase = new Phrase();
phrase.Add(new Chunk("Microsoft Northwind Traders Company'n'n", FontFactory.GetFont("Arial", 16, Font.BOLD, Color.RED)));
phrase.Add(new Chunk("107, Park site,'n", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
phrase.Add(new Chunk("Salt Lake Road,'n", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
phrase.Add(new Chunk("Seattle, USA", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
cell = PhraseCell(phrase, PdfPCell.ALIGN_LEFT);
cell.VerticalAlignment = PdfCell.ALIGN_TOP;
table.AddCell(cell);
document.Add(table);
table = new PdfPTable(2);
table.HorizontalAlignment = Element.ALIGN_LEFT;
table.SetWidths(new float[] { 0.3f, 1f });
table.SpacingBefore = 20f;
//Employee Details
cell = PhraseCell(new Phrase("Employee Record", FontFactory.GetFont("Arial", 12, Font.UNDERLINE, Color.BLACK)), PdfPCell.ALIGN_CENTER);
cell.Colspan = 2;
table.AddCell(cell);
cell = PhraseCell(new Phrase(), PdfPCell.ALIGN_CENTER);
cell.Colspan = 2;
cell.PaddingBottom = 30f;
table.AddCell(cell);
table = new PdfPTable(2);
table.SetWidths(new float[] { 0.5f, 2f });
table.TotalWidth = 340f;
table.LockedWidth = true;
table.SpacingBefore = 20f;
table.HorizontalAlignment = Element.ALIGN_RIGHT;
phrase = new Phrase();
phrase.Add(new Chunk("Mr. Mudassar Ahmed Khan'n", FontFactory.GetFont("Arial", 10, Font.BOLD, Color.BLACK)));
phrase.Add(new Chunk("(Moderator)", FontFactory.GetFont("Arial", 8, Font.BOLD, Color.BLACK)));
cell = PhraseCell(phrase, PdfPCell.ALIGN_LEFT);
cell.VerticalAlignment = PdfPCell.ALIGN_MIDDLE;
cell.Colspan = 2;
table.AddCell(cell);
cell = PhraseCell(new Phrase(" "), PdfPCell.ALIGN_LEFT);
cell.Colspan = 2;
table.AddCell(cell);
//Employee Id
table.AddCell(PhraseCell(new Phrase("Employee code:", FontFactory.GetFont("Arial", 8, Font.BOLD, Color.BLACK)), PdfPCell.ALIGN_LEFT));
table.AddCell(PhraseCell(new Phrase("0001", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)), PdfPCell.ALIGN_LEFT));
cell = PhraseCell(new Phrase(), PdfPCell.ALIGN_CENTER);
cell.Colspan = 2;
cell.PaddingBottom = 10f;
table.AddCell(cell);
//Address
table.AddCell(PhraseCell(new Phrase("Address:", FontFactory.GetFont("Arial", 8, Font.BOLD, Color.BLACK)), PdfPCell.ALIGN_LEFT));
phrase = new Phrase(new Chunk("507 - 20th Ave. E.'nApt. 2A'n", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
phrase.Add(new Chunk("Seattle'n", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
phrase.Add(new Chunk("WA USA 98122", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
table.AddCell(PhraseCell(phrase, PdfPCell.ALIGN_LEFT));
cell = PhraseCell(new Phrase(), PdfPCell.ALIGN_CENTER);
cell.Colspan = 2;
cell.PaddingBottom = 10f;
table.AddCell(cell);
//Date of Birth
table.AddCell(PhraseCell(new Phrase("Date of Birth:", FontFactory.GetFont("Arial", 8, Font.BOLD, Color.BLACK)), PdfPCell.ALIGN_LEFT));
table.AddCell(PhraseCell(new Phrase("25 FEBRUARY", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)), PdfPCell.ALIGN_LEFT));
cell = PhraseCell(new Phrase(), PdfPCell.ALIGN_CENTER);
cell.Colspan = 2;
cell.PaddingBottom = 10f;
table.AddCell(cell);
document.Add(table);
//Add border to page
PdfContentByte content = writer.DirectContent;
Rectangle rectangle = new Rectangle(document.PageSize);
rectangle.Left += document.LeftMargin;
rectangle.Right -= document.RightMargin;
rectangle.Top -= document.TopMargin;
rectangle.Bottom += document.BottomMargin;
content.SetColorStroke(Color.BLACK);
content.Rectangle(rectangle.Left, rectangle.Bottom, rectangle.Width, rectangle.Height);
content.Stroke();
document.Close();
byte[] bytes = memoryStream.ToArray();
memoryStream.Close();
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "attachment; filename=Employee.pdf");
Response.ContentType = "application/pdf";
Response.Buffer = true;
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.BinaryWrite(bytes);
Response.End();
Response.Close();
}
}
private static PdfPCell PhraseCell(Phrase phrase, int align)
{
PdfPCell cell = new PdfPCell(phrase);
cell.BorderColor = Color.WHITE;
cell.VerticalAlignment = PdfCell.ALIGN_TOP;
cell.HorizontalAlignment = align;
cell.PaddingBottom = 2f;
cell.PaddingTop = 0f;
return cell;
}