Convert file to PDF

Recently, a project needs to convert files (such as Word, Excel, txt, and image) to PDF files. After searching the documents, there are many implementation methods, such as calling a virtual printer for conversion, use third-party components (such as itextsharp and sharppdf. Now both of them are used. When HTML is converted to a PDF file, I cut the HTML into an image and convert it to a PDF file. If you have good suggestions, you can discuss it together.
What are the best implementation methods for converting PDF files to excel files?
First paste some source code,: http://download.csdn.net/source/2646952

C # code

 

/// <Summary>
/// Convert EXCEL to PDF
/// </Summary>
/// <Param name = "file_inputname"> </param>
Public void printsheettopdf (string fileinputname)
{
Try
{
Getprintername (ref printername, ref obj_printer_settings, ref otype );

Printdocument prtdoc = new printdocument ();

Currentprintername = prtdoc. printersettings. printername; // get the default printer name

// Change the default printer
Setdefaprinprinter (printername. Trim ());
// Notify the change
Sendpolicymessage (hwnd_broadcast, wm_wininichange, 0, "Windows ");

If (fileinputname = "")
{
Return;
}

Filepath = filesavepath + "//" + getfilename (fileinputname) + ". pdf ";

Otype. invokemember ("init", system. reflection. bindingflags. invokemethod, null, obj_printer_settings, null );

Otype. invokemember ("setvalue", system. reflection. bindingflags. invokemethod, null, obj_printer_settings, new object [] {"output", filepath });

Otype. invokemember ("setvalue", system. reflection. bindingflags. invokemethod, null, obj_printer_settings, new object [] {"showsettings", "never "});

Otype. invokemember ("setvalue", system. reflection. bindingflags. invokemethod, null, obj_printer_settings, new object [] {"showpdf", "no "});

Otype. invokemember ("setvalue", system. reflection. bindingflags. invokemethod, null, obj_printer_settings, new object [] {"showprogress", "no "});

Otype. invokemember ("setvalue", system. reflection. bindingflags. invokemethod, null, obj_printer_settings, new object [] {"showprogressfinished", "no "});

Otype. invokemember ("setvalue", system. reflection. bindingflags. invokemethod, null, obj_printer_settings, new object [] {"suppresserrors", "yes "});

Otype. invokemember ("setvalue", system. reflection. bindingflags. invokemethod, null, obj_printer_settings, new object [] {"confirmoverwrite", "no "});

Otype. invokemember ("writesettings", system. reflection. bindingflags. invokemethod, null, obj_printer_settings, new object [] {true });

If (file. exists (filepath) = true)
{
File. Delete (filepath );
}

Object objmissing = system. type. missing;

Object objvalue = true;

Microsoft. Office. InterOP. Excel. Application objexcel = new Microsoft. Office. InterOP. Excel. Application ();

Microsoft. office. interOP. excel. workbook objworkbook = objexcel. workbooks. open (filesavepath + "//" + fileinputname, objmissing, objvalue, objmissing, objmissing, missing, fail, objmissing, fail, objmissing );

Objexcel. Visible = false;

For (INT I = 1; I <objworkbook. worksheets. Count; I ++)
{
_ Worksheet active_workbook = (_ worksheet) objexcel. worksheets. get_item (I );

Active_workbook.pagesetup.zoom = false;

Active_workbook.pagesetup.fittopageswide = 1;

Active_workbook.pagesetup.fittopagestall = 10;
}

Objexcel. activeworkbook. printout (objmissing, objmissing );

For (INT f_intstep = 1; f_intstep <20000; f_intstep ++)
{
System. Threading. thread. Sleep (100 );

If (file. exists (filepath) = true)
{
Break;
}
}

Objworkbook. Close (false, fileinputname, false );

Objexcel. Quit ();

Objworkbook = NULL;

Objexcel = NULL;

Int K = 0;

Intptr T = new intptr (objexcel. hwnd );

Getwindowthreadprocessid (T, out k );

System. Diagnostics. PROCESS p = system. Diagnostics. process. getprocpolicyid (k );

P. Kill ();

Obj_printer_settings = NULL;

// Change the default printer
Setdefaprinprinter (currentprintername. Trim ());
// Notify the change
Sendpolicymessage (hwnd_broadcast, wm_wininichange, 0, "Windows ");
}
Catch (exception E)
{
Obj_printer_settings = NULL;
// Throw E;
}
}