iTextSharp AddText導致'此頁面上存在錯誤'

Question

生成的PDF文檔會'此頁面存在錯誤'。當在Acrobat Adob​​e Reader中打開時。任何想法爲什麼會發生這種情況？它發生在舊版本的iTextSharp和我今天嘗試的5.1.1版本中。

測試代碼：

 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(); 
    } 
    } 

Answer 1

你需要移動BeginText和ENDTEXT方法，使它們只適用於您的文本。以下適用於我：

 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();