我有 5 页 pdf 需要根据坐标突出显示特定元素
有X top left,Y top left,X top right ,Y top right , X bottom right , Y bottom right ,X bottom left, Y bottom left
。
我使用 iTextsharp 尝试了下面的代码,请建议我们如何做到这一点,包括页面编号
using System;
using System.ComponentModel;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;
//Create a simple test file
string outputFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "Test.pdf");
//Create a new file from our test file with highlighting
string highLightFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "Highlighted.pdf");
//Bind a reader and stamper to our test PDF
PdfReader reader = new PdfReader(outputFile);
using (FileStream fs = new FileStream(highLightFile, FileMode.Create, FileAccess.Write, FileShare.None))
{
using (PdfStamper stamper = new PdfStamper(reader, fs))
{
//Create a rectangle for the highlight. NOTE: Technically this isn't used but it helps with the quadpoint calculation
iTextSharp.text.Rectangle rect = new iTextSharp.text.Rectangle(60.6755f, 749.172f, 94.0195f, 735.3f);
//Create an array of quad points based on that rectangle. NOTE: The order below doesn't appear to match the actual spec but is what Acrobat produces
float[] quad = { rect.Left, rect.Bottom, rect.Right, rect.Bottom, rect.Left, rect.Top, rect.Right, rect.Top };
//Create our hightlight
PdfAnnotation highlight = PdfAnnotation.CreateMarkup(stamper.Writer, rect, null, PdfAnnotation.MARKUP_HIGHLIGHT, quad);
//Set the color
highlight.Color = BaseColor.YELLOW;
//Add the annotation
stamper.AddAnnotation(highlight,1);
}
}
以矩形输出 高亮元素。需要突出显示 PDF 的第 3 页。
"boundingBox": [3.2924,7.7146,5.7564,7.7038,5.7671,7.9836,3.3032,7.9943]
这个“文本”:“66 66 6666 6666”应该被突出显示