在图像背景上覆盖文字并转换为PDF [英] Overlay text over an image background and convert to PDF
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问题描述
我要使用.NET,以编程方式创建一个PDF,该PDF仅包含背景图像,在背景图像上带有两个标签,字体和位置都不同.我已经阅读了有关现有PDF库的信息,但不知道(如果适用的话)哪个是最简单的任务.
Using .NET, I want to programmatically create a PDF which simply consists of a background image with two labels over it with different fonts and positioning. I have read about existing PDF libraries, but don't know (if applicable) which one is the easiest for such a simple task.
有人在指导我吗?
P.D.: I do not want to create the PDF with a generated image that already overlays the text over the background image.
这是最终的工作代码:
This is the final working code:
public string Create()
{
if (!Directory.Exists(ApplicationImagePath))
{
Directory.CreateDirectory(ApplicationImagePath);
}
// Smart card
var doc = new Document(PageSize.GetRectangle("153 242.65"), 0, 0, 0, 0);
using (var stream = File.Create(filepath))
{
var writer = PdfWriter.GetInstance(doc, stream);
doc.Open();
var image = Image.GetInstance(CarnetData.Frame, ImageFormat.Png);
image.Alignment = Element.ALIGN_CENTER;
image.ScaleToFit(153, 242.65f);
doc.Add(image);
BaseFont font = BaseFont.CreateFont(GetFontPath(CarnetConfiguration.FontType), BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
font.PostscriptFontName = CarnetConfiguration.FontType.ToString();
float verticalPosition = writer.GetVerticalPosition(false);
var pName = new Paragraph(CarnetData.Name, new Font(font, FontData.EmployeeFont.SizeInPoints))
{
SpacingBefore = verticalPosition - 51f,
MultipliedLeading = 1.1f,
Alignment = Element.ALIGN_CENTER
};
doc.Add(pName);
var pDepartment = new Paragraph(CarnetData.Department, new Font(font, FontData.DepartmentFont.SizeInPoints))
{
SpacingBefore = 1.5f,
MultipliedLeading = 1.2f,
Alignment = Element.ALIGN_CENTER
};
doc.Add(pDepartment);
writer.ViewerPreferences = PdfWriter.PageModeUseNone + PdfWriter.CenterWindow + PdfWriter.PageLayoutSinglePage;
doc.Close();
}
return filepath;
}
感谢您的帮助. :)
推荐答案
iTextSharp 是一个很棒的库您可以使用,非常简单直观:
iTextSharp is a great library you could use, very simple and intuitive:
var doc = new Document();
using (var stream = File.Create("output.pdf"))
{
var writer = PdfWriter.GetInstance(doc, stream);
doc.Open();
doc.Add(Image.GetInstance(@"c:\foo\test.png"));
var cb = writer.DirectContent;
cb.BeginText();
cb.SetTextMatrix(100, 220);
var font = BaseFont.CreateFont(BaseFont.TIMES_ROMAN, BaseFont.CP1252, false);
cb.SetFontAndSize(font, 12);
cb.ShowText("Hello World");
cb.EndText();
cb.BeginText();
cb.SetTextMatrix(100, 250);
cb.ShowText("Some other text");
cb.EndText();
doc.Close();
}
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