.Net Core 操作PDF模板

1.安装PdfSharpCore

 2.

PdfSharpCore.Pdf.PdfDocument doc = PdfSharpCore.Pdf.IO.PdfReader.Open(temppath, PdfDocumentOpenMode.Modify);//创建一个文档实例，temppath为模板文件路径

XFont font = new XFont("SimHei", 10);//字体

PdfSharpCore.Pdf.AcroForms.PdfAcroForm form = doc.AcroForm;//获取文档的表单，这个表单就是模板里配置的表单

foreach (var fieldName in form.Fields.Names)
{
      var run = form.Fields[fieldName] as PdfTextField;
      var text = run.Name; //表单字段
       run.ReadOnly = false;//先去掉只读属性
       run.Value = new 
PdfSharpCore.Pdf.PdfString(value,PdfStringEncoding.Unicode);//中文编码转译，不然会乱码
       run.ReadOnly = true;//设置只读
 }
        

3.也可直接在某一处添加文字、图片等

using (var xGraphics = XGraphics.FromPdfPage(doc.Pages[0]))
{
     font = new XFont("SimHei", 10);
     //这里是绘制了一个条形码
     XFont BarcodeFont = new XFont("Code 128", 14, XFontStyle.Regular)
     BarCode b = BarCode.FromType(CodeType.Code3of9Standard, "条形码数据", new XSize(100, 25));
     xGraphics.DrawBarCode(b, new XPoint(80, 7));

     //绘制文字
     xGraphics.DrawString("这是文字", font, XBrushes.Black, new XPoint(100, 45));

     xGraphics.Save(); 
}

doc.Save(smallfilePath + $"{date}_{(j + 1)}.pdf");
doc.Close();
doc.Dispose();