在iTextSharp的ColumnText上設置字體和大小

Question

我正在向現有的pdf模板添加一些文本，圖像和html字符串。我已經設法添加文本和圖像，但是當我將這些html元素添加到ColumnText時，我無法弄清楚如何在該特定的ColumnText上設置字體和大小。

有沒有什麼方法可以將字體和大小設置爲ColumnText？

const string oldFile = "c:\\template.pdf"; 
const string newFile = "c:\\brandNewFile.pdf"; 
const string lightFontFile = "c:\\HelveticaNeueLight.ttf"; 
const string boldFontFile = "c:\\HelveticaNeueBoldItalic.ttf"; 
const string thinlight = "c:\\HelveticaNeueThinItalic.ttf"; 
const string logo = "c:\\logo.png"; 

// open the reader 
var reader = new PdfReader(oldFile); 
Rectangle size = reader.GetPageSizeWithRotation(1); 
var document = new Document(size); 

// open the writer 
var fs = new FileStream(newFile, FileMode.Create, FileAccess.Write); 
var writer = PdfWriter.GetInstance(document, fs); 
document.Open(); 

// the pdf content 
PdfContentByte cb = writer.DirectContent; 

// Very nice font and size 
var veryNiceBaseFont = BaseFont.CreateFont(boldFontFile, BaseFont.CP1252, BaseFont.NOT_EMBEDDED); 
cb.SetColorFill(new BaseColor(0x00, 0x57, 0x94)); // Certain BLUE RGB 
cb.SetFontAndSize(veryNiceBaseFont, 11f); 

// Add text 
cb.BeginText(); 
text = "Here is an amazing text that I add on top of the template!"; 
cb.SetCharacterSpacing(0.8f); 
cb.ShowTextAligned(PdfContentByte.ALIGN_LEFT, text, 79, 582, 0); 
cb.EndText(); 

// Different font 
var paragraphBaseFont = BaseFont.CreateFont(lightFontFile, BaseFont.CP1252, BaseFont.NOT_EMBEDDED); 
cb.SetColorFill(BaseColor.BLACK); 
cb.SetFontAndSize(paragraphBaseFont, 12f); 

// Add more text 
cb.BeginText(); 
string text = "More text in different font"; 
cb.SetCharacterSpacing(0.8f); 
cb.ShowTextAligned(PdfContentByte.ALIGN_LEFT, text, 79, 600, 0); 
cb.EndText(); 

// Add the logo image 
Image image = Image.FromFile(logo); 
iTextSharp.text.Image pic = iTextSharp.text.Image.GetInstance(image, ImageFormat.Png); 
if (pic.Height > pic.Width) 
{ 
    //Maximum height is 800 pixels. 
    float percentage = 0.0f; 
    percentage = 110/pic.Height; 
    pic.ScalePercent(percentage * 100); 
} 
else 
{ 
    //Maximum width is 600 pixels. 
    float percentage = 0.0f; 
    percentage = 80/pic.Width; 
    pic.ScalePercent(percentage * 100); 
} 
pic.SetAbsolutePosition(440, 575); 
cb.AddImage(pic); 

// Create the new page and add it to the pdf 
PdfImportedPage page = writer.GetImportedPage(reader, 1); 
cb.AddTemplate(page, 0, 0); 

// create the html part of the document 
string html = 
    "<p>This is a paragraph. Derp derp derp derp !</p>" + 
    "<p><strong><span style=\"color: #005794;\">With some style and such.</span></strong></p>" + 
    "<p>DERP</p>" + 
    "<p><span style=\"color: #ed1c24;\">DERP</span></p>" + 
    "<p>DERP</p>"; 


var elements = XMLWorkerHelper.ParseToElementList(html, null); 
var paragraph = new Paragraph(); 
paragraph.Font = new Font(iTextSharp.text.Font.FontFamily.HELVETICA, 10f); //not working!!!! 
//TODO: I am confused, should I try to set font as above, or somehow set columntext? 
foreach (var es in elements) 
{ 
    paragraph.Add(es); 
    paragraph.Add(Chunk.NEWLINE); 
} 
var ct = new ColumnText(cb); 
ct.SetSimpleColumn(paragraph, 80, 460, 475, 0, 15, Element.ALIGN_LEFT); 
ct.Go(); 

// close the streams and voilá the file should be changed :) 
document.Close(); 
fs.Close(); 
writer.Close(); 
reader.Close(); 

縮寫代碼（我被要求刪除評論不必要的代碼）：

// create the html part of the document 
string html = 
    "<p>This is a paragraph. Derp derp derp derp !</p>" + 
    "<p><strong><span style=\"color: #005794;\">With some style and such.</span></strong></p>" + 
    "<p>DERP</p>" + 
    "<p><span style=\"color: #ed1c24;\">DERP</span></p>" + 
    "<p>DERP</p>"; 


var elements = XMLWorkerHelper.ParseToElementList(html, null); 
var paragraph = new Paragraph(); 
paragraph.Font = new Font(iTextSharp.text.Font.FontFamily.HELVETICA, 10f); //not working!!!! 
//TODO: I am confused, should I try to set font as above, or somehow set columntext? 
foreach (var es in elements) 
{ 
    paragraph.Add(es); 
    paragraph.Add(Chunk.NEWLINE); 
} 
var ct = new ColumnText(cb); 
ct.SetSimpleColumn(paragraph, 80, 460, 475, 0, 15, Element.ALIGN_LEFT); 
ct.Go(); 

Answer 1

我找到了一種方法來改變BASEFONT爲IElements，因此設置我想要的字體和大小（但也保持內聯標記樣式的字體重量和顏色）。

這裏是從上面的縮寫代碼的例子：

string html = 
    "<p>This is a paragraph. Derp derp derp derp !</p>" + 
    "<p><strong><span style=\"color: #005794;\">With some style and such.</span></strong></p>" + 
    "<p>DERP</p>" + 
    "<p><span style=\"color: #ed1c24;\">DERP</span></p>" + 
    "<p>DERP</p>"; 

var elements = XMLWorkerHelper.ParseToElementList(html, null); 
var paragraph = new Paragraph(); 
foreach (var es in elements) 
{ 
    // 
    var tempBase = BaseFont.CreateFont(lightFontFile, BaseFont.CP1252, BaseFont.NOT_EMBEDDED); 
    var tempFont = new Font(tempBase, es.Chunks[0].Font.Size, es.Chunks[0].Font.Style, es.Chunks[0].Font.Color); 
    foreach (var chunk in es.Chunks) 
    { 
     chunk.Font = tempFont; 
    } 
    paragraph.Add(es); 
    paragraph.Add(Chunk.NEWLINE); 
} 
var ct = new ColumnText(cb); 
ct.SetSimpleColumn(paragraph, 80, 460, 475, 0, 15, Element.ALIGN_LEFT); 
ct.Go();