在PDF导出上创建水印文本 [英] Creating watermark text on PDF export

问题描述

我有这个PDF导出方法。我想添加水印文本作为背景。有人可以帮帮我吗？谢谢。

 private void ExportGridToPDF（）
 {
 
 username =（string）（Session） [用户名]）; 
 Response.ContentType =application / pdf; 
 Response.AddHeader（content-disposition，attachment; filename =+ 
 username +'Purchase.pdf）; 
 Response.Cache.SetCacheability（HttpCacheability.NoCache）; 
 StringWriter sw = new StringWriter（）; 
 HtmlTextWriter hw = new HtmlTextWriter（sw）; 
 //gv_CartProduct.DataBind（）; 
 
 
 gv_CartProduct.RenderControl（hw）; 
 //gv_CartProduct.HeaderRow.Style.Add(\"width，15％）; 
 //gv_CartProduct.HeaderRow.Style.Add(\"font-size，10px）; 
 //gv_CartProduct.Style.Add(\"text-decoration，none）; 
 //gv_CartProduct.Style.Add(\"font-family，Arial，Helvetica，sans-serif;）; 
 //gv_CartProduct.Style.Add(\"font-size，8px）; 
 
 
 StringReader sr = new StringReader（sw.ToString（））; 
 string str =< h1 title ='Header'align ='Center'>谢谢你
 +用户名+，以
购物ShopNow< / h1>< br> ;< table 
 align ='Center'>< tr>< td 
 style ='width：100px; color：green'>您已在ShopNow成功付款
在线商店。请
保留此发票。感谢
您< / td>< / tr>< / table>; 
 StringReader sr1 = new StringReader（str）; 
文件pdfDoc =新文件（PageSize.A4,7f，7f，7f，0f）; 
 HTMLWorker htmlparser = new HTMLWorker（pdfDoc）; 
 PdfWriter.GetInstance（pdfDoc，Response.OutputStream）; 
 
 
 pdfDoc.Open（）; 
 htmlparser.Parse（sr1）; 
 htmlparser.Parse（sr）; 
 ConfirmPurchase（）; 
 
 
 pdfDoc.Close（）; 
 Response.Write（pdfDoc）; 
 
 
 
} 
 

解决方案

你可以参考这个codeproject文章 PDF文件编写器C＃类库（版本1.11.0） [ ^

Hi, I have this PDF export method. I wanted to add watermarking text as the background. Anyone can help me? Thank you.

private void ExportGridToPDF()
               {

                   username = (string)(Session["username"]);
                   Response.ContentType = "application/pdf";
                   Response.AddHeader("content-disposition", "attachment;filename=" +
                                   username + "'s Purchase.pdf");
                   Response.Cache.SetCacheability(HttpCacheability.NoCache);
                   StringWriter sw = new StringWriter();
                   HtmlTextWriter hw = new HtmlTextWriter(sw);
                   //gv_CartProduct.DataBind();


                   gv_CartProduct.RenderControl(hw);
                   //gv_CartProduct.HeaderRow.Style.Add("width", "15%");
                   //gv_CartProduct.HeaderRow.Style.Add("font-size", "10px");
                   //gv_CartProduct.Style.Add("text-decoration", "none");
                   //gv_CartProduct.Style.Add("font-family", "Arial, Helvetica, sans-serif;");
                   //gv_CartProduct.Style.Add("font-size", "8px");


                   StringReader sr = new StringReader(sw.ToString());
                   string str = "<h1 title=’Header’ align=’Center’> Thank You "
                                  +  username + ", for shopping at
                                   ShopNow</h1><br><table
                                    align=’Center’><tr><td
                                    style=’width:100px;color:green’> You have made
                                    successful payment at ShopNow online shop. Please
                                    keep this invoice. Thank
                                   You</td></tr></table>";
                   StringReader sr1 = new StringReader(str);
                   Document pdfDoc = new Document(PageSize.A4, 7f, 7f, 7f, 0f);
                   HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
                   PdfWriter.GetInstance(pdfDoc, Response.OutputStream);


                   pdfDoc.Open();
                   htmlparser.Parse(sr1);
                   htmlparser.Parse(sr);
                   ConfirmPurchase();


                   pdfDoc.Close();
                   Response.Write(pdfDoc);



               }

解决方案

You can refer to this codeproject article PDF File Writer C# Class Library (Version 1.11.0)[^]

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