C#实现office文档转换为PDF或xps的一些方法

这段时间一直在研究office文档转为PDF或xps格式的方法。查找了一些资料。

一下是我所知道的一些方法

代码支持任意office格式

需要安装office 2007 还有一个office2007的插件OfficeSaveAsPDFandXPS

下载地址

[url]http://www.microsoft.com/downloads/details.aspx?FamilyId=4D951911-3E7E-4AE6-B059-A2E79ED87041&displaylang=en[/url]

这是一个微软官方出的office插件。

安装好之后，打开VS,以VS2005为例

新建windows应用程序项目

添加以下com组件的引用

Microsoft Word 12.0 Object Library

Microsoft PowerPoint 12.0 Object Library

Microsoft Excel 12.0 Object Library

 

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using Word = Microsoft.Office.Interop.Word;
using Excel = Microsoft.Office.Interop.Excel;
using PowerPoint = Microsoft.Office.Interop.PowerPoint;

using Microsoft.Office.Core;

 

我们可以使用一个枚举类型来决定生成文件的类型

Word.WdExportFormat wd = Microsoft.Office.Interop.Word.WdExportFormat.wdExportFormatPDF;

Excel.XlFixedFormatType excelType = Microsoft.Office.Interop.Excel.XlFixedFormatType.xlTypePDF;
PowerPoint.PpSaveAsFileType ppType = Microsoft.Office.Interop.PowerPoint.PpSaveAsFileType.ppSaveAsPDF;

 

这里Word跟Excel我使用了ExportAsFixedFormat,PowerPoint我使用了SaveAs方法。

对于Word跟PowerPoint效果是一样的，只是SaveAs方法支持的格式更多。

但是Excel似乎不支持SaveAs方法，呵呵

----------------

Word转换方法

private bool Convert(string sourcePath, string targetPath, Word.WdExportFormat exportFormat)
                {
                        bool result;
                        object paramMissing = Type.Missing;
                        Word.ApplicationClass wordApplication = new Word.ApplicationClass();
                        Word.Document wordDocument = null;
                        try
                        {
                                object paramSourceDocPath = sourcePath;
                                string paramExportFilePath = targetPath;

                                Word.WdExportFormat paramExportFormat = exportFormat;
                                bool paramOpenAfterExport = false;
                                Word.WdExportOptimizeFor paramExportOptimizeFor =
                                        Word.WdExportOptimizeFor.wdExportOptimizeForPrint;
                                Word.WdExportRange paramExportRange = Word.WdExportRange.wdExportAllDocument;
                                int paramStartPage = 0;
                                int paramEndPage = 0;
                                Word.WdExportItem paramExportItem = Word.WdExportItem.wdExportDocumentContent;
                                bool paramIncludeDocProps = true;
                                bool paramKeepIRM = true;
                                Word.WdExportCreateBookmarks paramCreateBookmarks =
                                        Word.WdExportCreateBookmarks.wdExportCreateWordBookmarks;
                                bool paramDocStructureTags = true;
                                bool paramBitmapMissingFonts = true;
                                bool paramUseISO19005_1 = false;

                                wordDocument = wordApplication.Documents.Open(
                                        ref paramSourceDocPath, ref paramMissing, ref paramMissing,
                                        ref paramMissing, ref paramMissing, ref paramMissing,
                                        ref paramMissing, ref paramMissing, ref paramMissing,
                                        ref paramMissing, ref paramMissing, ref paramMissing,
                                        ref paramMissing, ref paramMissing, ref paramMissing,
                                        ref paramMissing);

                                if (wordDocument != null)
                                        wordDocument.ExportAsFixedFormat(paramExportFilePath,
                                                paramExportFormat, paramOpenAfterExport,
                                                paramExportOptimizeFor, paramExportRange, paramStartPage,
                                                paramEndPage, paramExportItem, paramIncludeDocProps,
                                                paramKeepIRM, paramCreateBookmarks, paramDocStructureTags,
                                                paramBitmapMissingFonts, paramUseISO19005_1,
                                                ref paramMissing);
                                result = true;
                        }
                        finally
                        {
                                if (wordDocument != null)
                                {
                                        wordDocument.Close(ref paramMissing, ref paramMissing, ref paramMissing);
                                        wordDocument = null;
                                }
                                if (wordApplication != null)
                                {
                                        wordApplication.Quit(ref paramMissing, ref paramMissing, ref paramMissing);
                                        wordApplication = null;
                                }
                                GC.Collect();
                                GC.WaitForPendingFinalizers();
                                GC.Collect();
                                GC.WaitForPendingFinalizers();
                        }
                        return result;
                }

Excel转换方法

private bool Convert(string sourcePath, string targetPath, XlFixedFormatType targetType)
                {
                        bool result;
                        object missing = Type.Missing;
                        ApplicationClass application = null;
                        Workbook workBook = null;
                        try
                        {
                                application = new ApplicationClass();
                                object target = targetPath;
                                object type = targetType;
                                workBook = application.Workbooks.Open(sourcePath, missing, missing, missing, missing, missing,
                                        missing, missing, missing, missing, missing, missing, missing, missing, missing);

                                workBook.ExportAsFixedFormat(targetType, target, XlFixedFormatQuality.xlQualityStandard, true, false, missing, missing, missing, missing);
                                result = true;
                        }
                        catch
                        {
                                result = false;
                        }
                        finally
                        {
                                if (workBook != null)
                                {
                                        workBook.Close(true, missing, missing);
                                        workBook = null;
                                }
                                if (application != null)
                                {
                                        application.Quit();
                                        application = null;
                                }
                                GC.Collect();
                                GC.WaitForPendingFinalizers();
                                GC.Collect();
                                GC.WaitForPendingFinalizers();
                        }
                        return result;
                }

PowerPoint转换方法

                private bool Convert(string sourcePath, string targetPath, PpSaveAsFileType targetFileType)
                {
                        bool result;
                        object missing = Type.Missing;
                        ApplicationClass application = null;
                        Presentation persentation = null;
                        try
                        {
                                application = new ApplicationClass();
                                persentation = application.Presentations.Open(sourcePath, MsoTriState.msoTrue, MsoTriState.msoFalse, MsoTriState.msoFalse);
                                persentation.SaveAs(targetPath, targetFileType, Microsoft.Office.Core.MsoTriState.msoTrue);

                                result = true;
                        }
                        catch
                        {
                                result = false;
                        }
                        finally
                        {
                                if (persentation != null)
                                {
                                        persentation.Close();
                                        persentation = null;
                                }
                                if (application != null)
                                {
                                        application.Quit();
                                        application = null;
                                }
                                GC.Collect();
                                GC.WaitForPendingFinalizers();
                                GC.Collect();
                                GC.WaitForPendingFinalizers();
                        }
                        return result;
                }

 

如果是word文档或者Excel文档想要转换xps格式，我们还可以有一种方法，那就是利用xps虚拟打印机实现。

安装了.NetFrameWork3.5之后，默认会在系统中安装XPS虚拟打印机，我们将其设置为默认打印机。

Microsoft XPS Document Writer

word文档打印为xps

                public void PrintWord(string wordfile)
                {
                        oWord.ApplicationClass word = new oWord.ApplicationClass();
                        Type wordType = word.GetType();

                        //打开WORD文档
                        oWord.Documents docs = word.Documents;
                        Type docsType = docs.GetType();
                        object objDocName = wordfile;
                        oWord.Document doc = (oWord.Document)docsType.InvokeMember("Open", System.Reflection.BindingFlags.InvokeMethod, null, docs, new Object[] { objDocName, true, true });

                        //打印输出到指定文件
                        //可以使用 doc.PrintOut();方法,次方法调用中的参数设置较繁琐,建议使用 Type.InvokeMember 来调用时可以不用将PrintOut的参数设置全,只设置4个主要参数
                        Type docType = doc.GetType();
                        object printFileName = wordfile + ".xps";
                        docType.InvokeMember("PrintOut", System.Reflection.BindingFlags.InvokeMethod, null, doc, new object[] { false, false, oWord.WdPrintOutRange.wdPrintAllDocument, printFileName });

                        //退出WORD
                        wordType.InvokeMember("Quit", System.Reflection.BindingFlags.InvokeMethod, null, word, null);
                }

Excel利用虚拟打印机转换为xps

                public void PrintExcel(string execlfile)
                {
                        Excel.ApplicationClass eapp = new Excel.ApplicationClass();
                        Type eType = eapp.GetType();
                        Excel.Workbooks Ewb = eapp.Workbooks;
                        Type elType = Ewb.GetType();
                        object objelName = execlfile;
                        Excel.Workbook ebook = (Excel.Workbook)elType.InvokeMember("Open", System.Reflection.BindingFlags.InvokeMethod, null, Ewb, new Object[] { objelName, true, true });

                        object printFileName = execlfile + ".xps";

                        Object oMissing = System.Reflection.Missing.Value;
                        ebook.PrintOut(oMissing, oMissing, oMissing, oMissing, oMissing, true, oMissing, printFileName);

                        eType.InvokeMember("Quit", System.Reflection.BindingFlags.InvokeMethod, null, eapp, null);
                }

，同样，如果系统安装了PDF虚拟打印机，如5D PDF之类的，我们也可以将其设置为默认打印机以达到转换为PDF格式的目的

我们可以将这些方法放在windows service里面，实现文档的后台转换。