從現有PDF提取一系列頁面到一個新文件

Question

public void ExtractPages(string sourcePdfPath, string outputPdfPath, int startPage, int endPage) 
{ 
    PdfReader reader = null; 
    Document sourceDocument = null; 
    PdfCopy pdfCopyProvider = null; 
    PdfImportedPage importedPage = null; 
    try 
    { 
     // Intialize a new PdfReader instance with the contents of the source Pdf file: 
     reader = new PdfReader(sourcePdfPath); 

     // For simplicity, I am assuming all the pages share the same size 
     // and rotation as the first page: 
     sourceDocument = new Document(reader.GetPageSizeWithRotation(startPage)); 

     // Initialize an instance of the PdfCopyClass with the source 
     // document and an output file stream: 
     pdfCopyProvider = new PdfCopy(sourceDocument, 
      new System.IO.FileStream(outputPdfPath, System.IO.FileMode.Create)); 

     sourceDocument.Open(); 

     // Walk the specified range and add the page copies to the output file: 
     for (int i = startPage; i <= endPage; i++) 
     { 
      importedPage = pdfCopyProvider.GetImportedPage(reader, i); 
      pdfCopyProvider.AddPage(importedPage); 
     } 

     sourceDocument.Close(); 
     reader.Close(); 
    } 
    catch (Exception ex) 
    { 
     throw ex; 
    } 
} 

我正在使用asp.net應用程序。我正在使用以下方法將現有PDF中的一系列頁面提取到新文件。但我得到「訪問路徑被拒絕」錯誤消息。但我得到「訪問路徑被拒絕」錯誤消息。

編輯：

此行引發錯誤：

pdfCopyProvider = new PdfCopy(sourceDocument, 

      new System.IO.FileStream(outputPdfPath, System.IO.FileMode.Create)); 

Answer 1

試試這個，

PdfReader R = new PdfReader(srcPdfFilePath); 
using (PdfStamper stamper = new PdfStamper(R, new FileStream(dPdfFile, FileMode.Create))) 
{ 
// if you want to do any changes in new pdf do here. 
stamper.Close(); 
} 
R.Close(); 

注：

的代碼的PDF路徑&名稱和新pdf路徑&名稱不應該相同。因爲文件在打開時不能被覆蓋。