A pdf merge operation implementation class, implemented using the itextsharp Control

Http://blog.csdn.net/yinshuhai/article/details/3042702

Using itextsharp. text;

Using itextsharp.text.pdf;

/// <Summary>

/// PDF file Merging

/// </Summary>

Class merge mergemanager

{

Private volume writer PW;

Private pdfreader reader;

Private document;

Private metadata contentbyte CB;

Private pdfimportedpage Newpage;

/// <Summary>

/// Build the merge management through the output file and merge it into the new file. After the merge is completed, call the finishedmerge method.

/// </Summary>

/// <Param name = "soutfiles"> </param>

Public synchronized mergemanager (string soutfiles)

{

Document = new document (pagesize. A3 );

If (file. exists (soutfiles )&&! Messagehelper. showquestion ("the corresponding file already exists. Is the file directory/R/N" + soutfiles + "/R/n overwriting the file? "))

{

Document = NULL;

Throw new ioexception ("User cancels operation ");

}

PW = writable writer. getinstance (document, new filestream (soutfiles, filemode. Create ));

Document. open ();

CB = pw. directcontent;

}

/// <Summary>

/// Merge files into the current writable stream through the file stream. After the merge is completed, the finishedmerge method is called.

/// </Summary>

/// <Param name = "SM"> </param>

Public synchronized mergemanager (Stream sm)

{

Document = new document ();

PW = writable writer. getinstance (document, Sm );

Document. open ();

CB = pw. directcontent;

}

/// <Summary>

/// Merge files

/// </Summary>

/// <Param name = "sfiles"> name of the file path to be merged </param>

/// <Returns> </returns>

Public bool mergefile (string sfiles)

{

Reader = new pdfreader (sfiles );

{

Int ipagenum = reader. numberofpages;

For (Int J = 1; j <= ipagenum; j ++)

{

Newpage = pw. getimportedpage (reader, J );

Rectangle r = reader. getpagesize (j );

Document. setpagesize (R );

Document. Newpage ();

CB. addtemplate (Newpage, 0, 0 );

}

}

Reader. Close ();

Return true;

}

/// <Summary>

/// Merge files with byte data

/// </Summary>

/// <Param name = "coming in"> pdf byte data </param>

/// <Returns> </returns>

Public bool mergefile (byte [] bytes in)

{

Reader = new pdfreader (updated in );

{

Int ipagenum = reader. numberofpages;

For (Int J = 1; j <= ipagenum; j ++)

{

 

Newpage = pw. getimportedpage (reader, J );

Rectangle r = reader. getpagesize (j );

Document. setpagesize (R );

Document. Newpage ();

CB. addtemplate (Newpage, 0, 0 );

}

 

}

Reader. Close ();

Return true;

}

/// <Summary>

/// Merge files through a PDF file stream

/// </Summary>

/// <Param name = "mongostream"> pdf file stream </param>

/// <Returns> </returns>

Public bool mergefile (stream processing Stream)

{

Reader = new pdfreader (mongostream );

{

Int ipagenum = reader. numberofpages;

For (Int J = 1; j <= ipagenum; j ++)

{

 

Newpage = pw. getimportedpage (reader, J );

Rectangle r = reader. getpagesize (j );

Document. setpagesize (R );

Document. Newpage ();

CB. addtemplate (Newpage, 0, 0 );

}

 

}

Reader. Close ();

Return true;

}

/// <Summary>

/// Merge files by network address

/// </Summary>

/// <Param name = "pdfurl"> network path of the PDF file to be merged </param>

/// <Returns> </returns>

Public bool mergefile (URI signed URL)

{

Reader = new pdfreader (volume URL );

{

Int ipagenum = reader. numberofpages;

For (Int J = 1; j <= ipagenum; j ++)

{

 

Newpage = pw. getimportedpage (reader, J );

Rectangle r = reader. getpagesize (j );

Document. setpagesize (R );

Document. Newpage ();

CB. addtemplate (Newpage, 0, 0 );

}

 

}

Reader. Close ();

Return true;

}

/// <Summary>

/// Merge

/// </Summary>

Public void finishedmerge ()

{

Try

{

If (reader! = NULL)

{

Reader. Close ();

}

If (PW! = NULL)

{

PW. Flush ();

PW. Close ();

}

If (document. isopen ())

{

Document. Close ();

}

}

Catch

{

 

}

}

}