【C#】pdf文件合并

环境：VS2019 + Win10 + .NET Framework3.5

依赖于： itextsharp.dll

 

源码，封装接口：

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/// <summary> /// 合并pdf文件至输出文件 /// </summary> /// <param name="fileList">要合并的pdf文件列表(全路径)</param> /// <param name="outMergeFile">输出文件全路径</param> public void mergePdfFiles(List<string> fileList, string outMergeFile) {     using (var stream = new FileStream(outMergeFile, FileMode.Create))     {         using (var doc = new iTextSharp.text.Document())         {             using (var pdf = new PdfCopy(doc, stream))             {                 doc.Open();                 fileList.ForEach(file =>                 {                     var reader = new PdfReader(file);                     for (int i = 0; i < reader.NumberOfPages; i++)                     {                         var page = pdf.GetImportedPage(reader, i + 1);                         pdf.AddPage(page);                     }                     pdf.FreeReader(reader);                     reader.Close();                 });             }         }     } }

　　调用者代码：

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// using iTextSharp.text.pdf;           /// <summary>         /// 合并pdf文件至输出文件         /// </summary>         /// <param name="fileList">要合并的pdf文件列表(全路径)</param>         /// <param name="outMergeFile">输出文件全路径</param>         public void mergePdfFiles(List<string> fileList, string outMergeFile)         {             using (var stream = new FileStream(outMergeFile, FileMode.Create))             {                 using (var doc = new iTextSharp.text.Document())                 {                     using (var pdf = new PdfCopy(doc, stream))                     {                         doc.Open();                         fileList.ForEach(file =>                         {                             var reader = new PdfReader(file);                             for (int i = 0; i < reader.NumberOfPages; i++)                             {                                 var page = pdf.GetImportedPage(reader, i + 1);                                 pdf.AddPage(page);                             }                             pdf.FreeReader(reader);                             reader.Close();                         });                     }                 }             }         }