Question

我有两段代码。第一个是工作，第二个是循环内部，它没有显示值。

任何人都有任何想法？如果memorystream无法读取，那么循环是否过快？

我正在写一切memorystream并回复下载文件。如果我一个接一个地做，如下所示，一切正常。

        var phraseinvoice = new Phrase();
        phraseinvoice.Add(new Chunk("Invoice to:", FontFactory.GetFont(FontFactory.TIMES, 12)));              

        Invoicetable.AddCell(phraseinvoice);
        phraseinvoice = new Phrase();
        phraseinvoice.Add(new Chunk("BCD Meetings & Events Asia Pacific", FontFactory.GetFont(FontFactory.TIMES_BOLD, 12)));
        PdfPCell inheader = new PdfPCell(phraseinvoice);
        inheader.PaddingBottom = 4;
        inheader.Border = Rectangle.NO_BORDER;
        inheader.FixedHeight=20f;
        Invoicetable.AddCell(inheader);

如果我将它们放在数组中并从for循环中读取，则PDF将不会显示任何文本。

 string[] tbText = {" ","Pte.Ltd"," ", "20 Anson Road, #06-01"," ", "Twenty Anson 079912","",
                "Singapore"," "," ","Tel", "1234567", "Fax","123"," "," ","Delivery to:", "BCD Meetings & Events Asia Pacific"," ",
            "Pte,Ltd"," ","20 Anson Road, #06-01"," ", "Twenty Anson 079912"," ","Singapore"};

  Invoicetable.AddCell(inheader);
  for (int i = 0; i < 25; i++)
  {
      var inputstring = tbText[i];
      phraseinvoice = new Phrase();
      phraseinvoice.Add(new Chunk(inputstring, FontFactory.GetFont(FontFactory.TIMES_BOLD, 12)));
      PdfPCell cellbox = new PdfPCell(phraseinvoice);
      cellbox = new PdfPCell(phraseinvoice);
      cellbox.Border = Rectangle.NO_BORDER;
      cellbox.Padding= -4;
      Invoicetable.AddCell(cellbox);
  }

您可以看到-4填充后的第一个图像与没有填充的第二个图像之间的差异

Answer 1

您正在创建一个带有12pt字体文本的Phrase，但您将单元格的高度限制为10pt。这就解释了为什么没有显示出来。

更改您的代码：

for (int i = 0; i < 25; i++)
{
    var inputstring = tbText[i];
    phraseinvoice = new Phrase(inputstring,
        FontFactory.GetFont(FontFactory.TIMES_BOLD, 12)));
    PdfPCell cellbox = new PdfPCell(phraseinvoice);
    cellbox.Border = Rectangle.NO_BORDER;
    cellbox.FixedHeight = 20f;
    Invoicetable.AddCell(cellbox);
}

20个用户单位应足以显示12pt字体的文本。

<强>更新

另一种选择是缩小字体大小，例如：

for (int i = 0; i < 25; i++)
{
    var inputstring = tbText[i];
    phraseinvoice = new Phrase(inputstring,
        FontFactory.GetFont(FontFactory.TIMES_BOLD, 8)));
    PdfPCell cellbox = new PdfPCell(phraseinvoice);
    cellbox.Border = Rectangle.NO_BORDER;
    cellbox.FixedHeight = 15f;
    Invoicetable.AddCell(cellbox);
}

但还有更多：Phrase中PdfPCell所需的身高取决于：

字体大小
领先，
字体的上升和下降。

例如：

for (int i = 0; i < 25; i++)
{
    var inputstring = tbText[i];
    phraseinvoice = new Phrase(inputstring,
        FontFactory.GetFont(FontFactory.TIMES_BOLD, 12)));
    PdfPCell cellbox = new PdfPCell(phraseinvoice);
    cellbox.Leading = 14;
    cellbox.UseAscender = true;
    cellbox.UseDescender = true;
    cellbox.Border = Rectangle.NO_BORDER;
    cellbox.FixedHeight = 18f;
    Invoicetable.AddCell(cellbox);
}

请注意我们如何将Leading从默认值（字体大小的1.5倍）缩减为14，以及我们如何告诉cellBox采用 ascender 和 descender 。

Answer 2

看起来您正在尝试将字符串添加为pdfpcell

var inputstring = tbText [i];

Invoicetable.AddCell（inputstring）;

tbText是一个字符串数组

iTextSharp无法循环工作

2 个答案: