Question

我使用Itext生成pdf，我需要做一些像Chunk.keepOnSameLine。

我正在构建一个可以有多个由多个Chunks组成的行的短语，当行结束时，我希望块不被破坏。

Chunk是一个名字和日期。例如：＆＃34;约翰史密斯（2016-01-13 11:13）＆＃34;

代码就像

    Phrase p = new Phrase();
    Chunk c1 = new Chunk("FirstName LastName (2016-01-13 11:13)");
    p.Add(c1);
    Chunk c2 = new Chunk("FirstName LastName (2016-01-13 11:13)")
    p.Add(c2);
    Chunk c3 = new Chunk("FirstName LastName (2016-01-13 11:13)")
    p.Add(c3);
    Chunk c4 = new Chunk("FirstName LastName (2016-01-13 11:13)")
    p.Add(c4);
    Chunk c5 = new Chunk("FirstName LastName (2016-01-13 11:13)")
    p.Add(c5);
    Chunk c6 = new Chunk("FirstName LastName (2016-01-13 11:13)")
    p.Add(c6);
    Chunk c7 = new Chunk("FirstName LastName (2016-01-13 11:13)")
    p.Add(c7);

（代码是动态的，所以我不知道会有多少块。

结果短语显示为

然后将得到的短语添加到PdfPCell

Answer 1

您可以修改iText如何通过实施ISplitCharacter并用您自己的替换默认值（连字符和空格）来分割行：

public class CustomSplitCharacter : ISplitCharacter
{
    public bool IsSplitCharacter(
        int start, int current, int end, char[] cc, PdfChunk[] ck)
    {
        char c = ck == null
            ? cc[current]
            : (char)ck[Math.Min(current, ck.Length - 1)]
                .GetUnicodeEquivalent(cc[current])
        ;
        return (c == ')');
    }
}

然后在SetSplitCharacter()上致电Chunk：

string chunkText = "FirstName LastName (2016-01-13 11:13)";
Random random = new Random();
var font = new Font(Font.FontFamily.HELVETICA, 10, Font.BOLD); 
using (Document document = new Document())
{
    PdfWriter.GetInstance(document, stream);
    document.Open();
    Phrase phrase = new Phrase();
    for (var i = 0; i < 1000; ++i)
    {
        var asterisk = new String('*', random.Next(1, 20));
        Chunk chunk = new Chunk(
            string.Format("[{0}] {1}", asterisk, chunkText), 
            font
        );
        chunk.SetSplitCharacter(new CustomSplitCharacter());
        phrase.Add(chunk);
    }

    document.Add(phrase);
}

这假设您的Chunk以)结尾，就像您的示例代码一样，或者您可以控制Chunk的最后一个文字字符。

不依赖于特定字体。：）

Answer 2

使用non-breaking space的Unicode U+00A0。您还需要使用U+2011，non-breaking hyphen。但是，非破坏连字符在技术上与普通连字符的字符不同，所以你也需要一种支持它的字体。

var testString = "FirstName LastName (2016-01-13 11:13)";
var nbsp = "\u00a0";
var nbhy = "\u2011";

//With a normal space
var p1 = new Phrase();
for (var i = 0; i < 100; i++) {
    p1.Add(new Chunk(testString + " "));
}
doc.Add(p1);


//Create a font that supports our "hard hyphen"
var bf = BaseFont.CreateFont(fontFile, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
var f = new iTextSharp.text.Font(bf, 12);
testString = testString.Replace(" ", nbsp).Replace("-", nbhy);

//With a non-breaking space
var p2 = new Phrase();
for (var i = 0; i < 100; i++) {
    p2.Add(new Chunk(testString + " ", f));
}
doc.Add(p2);

Itext在chunk上缺少换行符

2 个答案: