iTextSharp AddText导致'此页存在错误'

本文关键字：存在 错误 iTextSharp AddText 导致 | 更新日期: 2023-09-27 18:01:58

生成的PDF文档得到"此页存在错误"。在acrobatadobereader中打开时。你知道为什么会这样吗?在我今天试用的旧版本iTextSharp和5.1.1版本中都发生了这种情况。

测试代码:

      static void PDFErrorOnPage()
  {
     Document document = new Document(PageSize.LETTER);
     float fMarginLeft = 15.822f; // 0.21975 inch
     float fMarginRight = 15.822f; // 0.21975 inch
     float fMarginTop = 36.0f;  // 0.5 inch
     float fMarginBottom = 36.0f;   // 0.5 inch
     float fLabelSpacingHorizontal = 10.08f;
     float fLabelWidth = 186.732f;
     float fLabelHeight = 72.0f;
     float fLabelPadding = 5.0f;
     float fLabelPaddingLeft = 20.0f;
     float fLabelPaddingBottom = 5.0f;
     float fLabelPaddingTop = 0.0f;
     int nRow = 0;
     int nCol = -1;
     bool bDebug = true;
     try
     {
        BaseFont bf = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
        Font font = new Font(bf, 8, Font.NORMAL, BaseColor.BLACK);
        Font fontBold = new Font(bf, 8, Font.BOLD, BaseColor.BLACK);
        PdfWriter writer = PdfWriter.GetInstance(document, new FileStream("d:''tempjunk''test.pdf", FileMode.Create));
        document.SetMargins(fMarginLeft, fMarginRight, fMarginTop, fMarginBottom);
        document.Open();
        PdfContentByte cb = writer.DirectContent;
        for (int i = 0; i < 26; i++)
        {
           nCol++;
           if (nCol > 2)
           {
              nCol = 0;
              nRow++;
           }
           if (nRow > 9)
           {
              nRow = 0;
              document.NewPage();
              Console.WriteLine("document.NewPage()");
           }
           float fLabelBottomLeftX = fMarginLeft + (nCol * fLabelSpacingHorizontal) + (nCol * fLabelWidth);
           float fLabelBottomLeftY = fMarginBottom + ((9 - nRow) * fLabelHeight);
           if (bDebug)
           {
              cb.SetRGBColorStroke(0x00, 0x00, 0xFF);
              cb.Rectangle(fLabelBottomLeftX, fLabelBottomLeftY, fLabelWidth, fLabelHeight);
              cb.Stroke();
           }
           cb.BeginText();
           ColumnText ct = new ColumnText(cb);
           ct.SetSimpleColumn(
              fLabelBottomLeftX + fLabelPaddingLeft,
              fLabelBottomLeftY + fLabelPaddingBottom,
              fLabelBottomLeftX + fLabelWidth - (fLabelPaddingLeft + fLabelPadding),
              fLabelBottomLeftY + fLabelHeight - (fLabelPaddingBottom + fLabelPaddingTop),
              12.0f,
              PdfContentByte.ALIGN_LEFT);
           ct.AddText(new Chunk("One'nTwo'nThree'nFour'nFive", font));
           ct.Go();
           cb.EndText();
        }
     }
     catch (Exception ex)
     {
        Console.WriteLine(ex.Message + " " + ex.StackTrace);
     }
     finally
     {
        if (document != null)
           document.Close();
     }
  }

iTextSharp AddText导致'此页存在错误'

您需要移动BeginText和EndText方法，以便它们只适用于您的文本。以下内容适合我:

       ColumnText ct = new ColumnText(cb);
       ct.SetSimpleColumn(
          fLabelBottomLeftX + fLabelPaddingLeft,
          fLabelBottomLeftY + fLabelPaddingBottom,
          fLabelBottomLeftX + fLabelWidth - (fLabelPaddingLeft + fLabelPadding),
          fLabelBottomLeftY + fLabelHeight - (fLabelPaddingBottom + fLabelPaddingTop),
          12.0f,
          PdfContentByte.ALIGN_LEFT);
       cb.BeginText();
       ct.AddText(new Chunk("One'nTwo'nThree'nFour'nFive", font));
       cb.EndText();
       ct.Go();
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