1 调用直接这样用：2  //PDFHelper.AddImageWatermarkPDF(path, "D://my.pdf", Server.MapPath("/HtmlToPdf/Tools/sy.bmp"), 0, 0);
3             string temp = DateTime.Now.ToLongDateString() + "  " +DateTime.Now.ToLongTimeString();4             Guid guid = newGuid();5             guid =Guid.NewGuid();6
7             string tempGUID =guid.ToString();8             File.Copy("E:\\1.pdf", "E:\\11.pdf", true);9             PDFHelper.AddWordWatermark2PDF("E:\\11.pdf", "E:\\1.pdf", "西安咸阳国际机场南三指廊航站楼工程施工及施工管理总承包" + "_" + temp + "_" + tempGUID + "_7.1");10             //PDFSetWaterMark.setWatermark("D://my.pdf", "D://my2.pdf", "TEST", "", "", 1);
11
12
13 usingiTextSharp.text;14 usingiTextSharp.text.pdf;15 usingSystem;16 usingSystem.Collections.Generic;17 usingSystem.IO;18 usingSystem.Linq;19 usingSystem.Text;20 usingSystem.Threading.Tasks;21
22 namespaceTest测试23 {24     public static classPDFHelper25 {26
27
28         /// <summary>
29         ///加图片水印30         /// </summary>
31         /// <param name="inputfilepath"></param>
32         /// <param name="outputfilepath"></param>
33         /// <param name="ModelPicName"></param>
34         /// <param name="top"></param>
35         /// <param name="left"></param>
36         /// <returns></returns>
37         public static bool AddImageWatermarkPDF(string inputfilepath, string outputfilepath, string ModelPicName, float top, floatleft)38 {39             //throw new NotImplementedException();
40             PdfReader pdfReader = null;41             PdfStamper pdfStamper = null;42             try
43 {44                 pdfReader = newPdfReader(inputfilepath);45
46                 int numberOfPages =pdfReader.NumberOfPages;47
48                 iTextSharp.text.Rectangle psize = pdfReader.GetPageSize(1);49
50                 float width =psize.Width;51
52                 float height =psize.Height;53
54                 pdfStamper = new PdfStamper(pdfReader, newFileStream(outputfilepath, FileMode.Create));55
56 PdfContentByte waterMarkContent;57
58                 iTextSharp.text.Image image =iTextSharp.text.Image.GetInstance(ModelPicName);59
60                 image.GrayFill = 20;//透明度，灰色填充61                                     //image.Rotation//旋转62                                     //image.RotationDegrees//旋转角度63                                     //水印的位置
64                 if (left < 0)65 {66                     left = width / 2 - image.Width +left;67 }68
69                 //image.SetAbsolutePosition(left, (height - image.Height) - top);
70                 image.SetAbsolutePosition(left, (height / 2 - image.Height) -top);71
72
73                 //每一页加水印,也可以设置某一页加水印
74                 for (int i = 1; i <= numberOfPages; i++)75 {76                     //waterMarkContent = pdfStamper.GetUnderContent(i);//内容下层加水印
77                     waterMarkContent = pdfStamper.GetOverContent(i);//内容上层加水印
78
79 waterMarkContent.AddImage(image);80 }81                 //strMsg = "success";
82                 return true;83 }84             catch(Exception ex)85 {86                 throwex;87
88 }89             finally
90 {91
92                 if (pdfStamper != null)93 pdfStamper.Close();94
95                 if (pdfReader != null)96 pdfReader.Close();97 }98 }99         /// <summary>
100         ///添加普通偏转角度文字水印101         /// </summary>
102         /// <param name="inputfilepath"></param>
103         /// <param name="outputfilepath"></param>
104         /// <param name="waterMarkName"></param>
105         /// <param name="permission"></param>
106         public static void AddWordWatermark2PDF(string inputfilepath, string outputfilepath, stringwaterMarkName)107 {108             PdfReader pdfReader = null;109             PdfStamper pdfStamper = null;110             try
111 {112                 pdfReader = newPdfReader(inputfilepath);113                 pdfStamper = new PdfStamper(pdfReader, newFileStream(outputfilepath, FileMode.Create));114                 int total = pdfReader.NumberOfPages + 1;115                 iTextSharp.text.Rectangle psize = pdfReader.GetPageSize(1);116                 float width =psize.Width;117                 float height =psize.Height;118 PdfContentByte content;119                 BaseFont font = BaseFont.CreateFont(@"C:\WINDOWS\Fonts\SIMFANG.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);120                 PdfGState gs = newPdfGState();121                 for (int i = 1; i < total; i++)122 {123                     content = pdfStamper.GetOverContent(i);//在内容上方加水印124                     //content = pdfStamper.GetUnderContent(i);//在内容下方加水印125                     //透明度
126                     gs.FillOpacity = 0.5f;127 content.SetGState(gs);128                     content.SetGrayFill(0.5f);129                     //开始写入文本
130 content.BeginText();131                     //content.SetColorFill(BaseColor.LIGHT_GRAY);132                     //content.SetFontAndSize(font, 100);133                     //content.SetTextMatrix(0, 0);134                     //content.ShowTextAligned(Element.ALIGN_CENTER, waterMarkName, width / 2 - 50, height / 2 - 50, 55);
135 content.SetColorFill(BaseColor.GRAY);136                     content.SetFontAndSize(font, 16);137                     content.ShowTextAligned(Element.ALIGN_CENTER, waterMarkName, width / 2 - 50, height / 2 - 50, 55);138 content.EndText();139 }140 }141             catch(Exception ex)142 {143                 throwex;144 }145             finally
146 {147
148                 if (pdfStamper != null)149 pdfStamper.Close();150
151                 if (pdfReader != null)152 pdfReader.Close();153 }154 }155
156
157
158         /// <summary>
159         ///添加倾斜水印160         /// </summary>
161         /// <param name="inputfilepath"></param>
162         /// <param name="outputfilepath"></param>
163         /// <param name="waterMarkName"></param>
164         /// <param name="userPassWord"></param>
165         /// <param name="ownerPassWord"></param>
166         /// <param name="permission"></param>
167         public static void setWatermark(string inputfilepath, string outputfilepath, string waterMarkName, string userPassWord, string ownerPassWord, intpermission)168 {169             PdfReader pdfReader = null;170             PdfStamper pdfStamper = null;171             try
172 {173                 pdfReader = newPdfReader(inputfilepath);174                 pdfStamper = new PdfStamper(pdfReader, newFileStream(outputfilepath, FileMode.Create));175                 //设置密码176                 //pdfStamper.SetEncryption(false,userPassWord, ownerPassWord, permission);
177
178                 int total = pdfReader.NumberOfPages + 1;179 PdfContentByte content;180                 BaseFont font = BaseFont.CreateFont(@"C:\WINDOWS\Fonts\SIMFANG.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);181                 PdfGState gs = newPdfGState();182                 gs.FillOpacity = 0.2f;//透明度
183
184                 int j =waterMarkName.Length;185                 charc;186                 int rise = 0;187                 for (int i = 1; i < total; i++)188 {189                     rise = 500;190                     content = pdfStamper.GetOverContent(i);//在内容上方加水印191                                                            //content = pdfStamper.GetUnderContent(i);//在内容下方加水印
192
193 content.BeginText();194 content.SetColorFill(BaseColor.DARK_GRAY);195                     content.SetFontAndSize(font, 50);196                     //设置水印文字字体倾斜 开始
197                     if (j >= 15)198 {199                         content.SetTextMatrix(200, 120);200                         for (int k = 0; k < j; k++)201 {202 content.SetTextRise(rise);203                             c =waterMarkName[k];204                             content.ShowText(c + "");205                             rise -= 20;206 }207 }208                     else
209 {210                         content.SetTextMatrix(180, 100);211                         for (int k = 0; k < j; k++)212 {213 content.SetTextRise(rise);214                             c =waterMarkName[k];215                             content.ShowText(c + "");216                             rise -= 18;217 }218 }219                     //字体设置结束
220 content.EndText();221                     //画一个圆222                     //content.Ellipse(250, 450, 350, 550);223                     //content.SetLineWidth(1f);224                     //content.Stroke();
225 }226
227 }228             catch(Exception ex)229 {230                 throwex;231 }232             finally
233 {234
235                 if (pdfStamper != null)236 pdfStamper.Close();237
238                 if (pdfReader != null)239 pdfReader.Close();240 }241 }242
243
244
245
246 }247
248
249
250 }