using Microsoft.Office.Interop.Word;

/// <summary>
    /// 把Word文件轉(zhuǎn)換成pdf文件
    /// </summary>
    /// <param name="sourcePath">需要轉(zhuǎn)換的文件路徑和文件名稱</param>
    /// <param name="targetPath">轉(zhuǎn)換完成后的文件的路徑和文件名名稱</param>
    /// <returns>成功返回true,失敗返回false</returns>
    public static bool WordToPdf(string sourcePath, string targetPath)
    {
        bool result = false;
        WdExportFormat wdExportFormatPDF = WdExportFormat.wdExportFormatPDF;//轉(zhuǎn)換格式1.wdExportFormatPDF轉(zhuǎn)換成pdf格式 2.wdExportFormatXPS轉(zhuǎn)換成xps格式
        object missing = Type.Missing;
        Microsoft.Office.Interop.Word.ApplicationClass applicationClass = null;
        Document document = null;
        try
        {
            applicationClass = new Microsoft.Office.Interop.Word.ApplicationClass();
            object inputfileName = sourcePath;//需要轉(zhuǎn)格式的文件路徑
            string outputFileName = targetPath;//轉(zhuǎn)換完成后PDF或XPS文件的路徑和文件名名稱
            WdExportFormat exportFormat = wdExportFormatPDF;//導(dǎo)出文件所使用的格式
            bool openAfterExport = false;//轉(zhuǎn)換完成后是否打開
            WdExportOptimizeFor wdExportOptimizeForPrint = WdExportOptimizeFor.wdExportOptimizeForPrint;//導(dǎo)出方式1.wdExportOptimizeForPrint針對(duì)打印進(jìn)行導(dǎo)出，質(zhì)量較高，生成的文件大小較大。2.wdExportOptimizeForOnScreen 針對(duì)屏幕顯示進(jìn)行導(dǎo)出，質(zhì)量較差，生成的文件大小較小。
            WdExportRange wdExportAllDocument = WdExportRange.wdExportAllDocument;//導(dǎo)出全部?jī)?nèi)容（枚舉）
            int from = 0;//起始頁碼
            int to = 0;//結(jié)束頁碼
            WdExportItem wdExportDocumentContent = WdExportItem.wdExportDocumentContent;//指定導(dǎo)出過程中是否只包含文本或包含文本的標(biāo)記.1.wdExportDocumentContent:導(dǎo)出文件沒有標(biāo)記,2.導(dǎo)出文件有標(biāo)記
            bool includeDocProps = true;//指定是否包含新導(dǎo)出的文件在文檔屬性
            bool keepIRM = true;//
            WdExportCreateBookmarks wdExportCreateWordBookmarks = WdExportCreateBookmarks.wdExportCreateWordBookmarks;//1.wdExportCreateNoBookmarks:不要在導(dǎo)出文件中創(chuàng)建書簽,2.wdExportCreateHeadingBookmarks：標(biāo)題和文本框?qū)С龅奈募袆?chuàng)建一個(gè)書簽，3.wdExportCreateWordBookmarks每個(gè)字的書簽，其中包括除包含頁眉和頁腳中的所有書簽導(dǎo)出的文件中創(chuàng)建一個(gè)書簽。
            bool docStructureTags = true;
            bool bitmapMissingFonts = true;
            bool UseISO19005_1 = false;//生成的文檔是否符合 ISO 19005-1 (PDF/A)
            document = applicationClass.Documents.Open(ref inputfileName, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing);
            if (document != null)
            {
                document.ExportAsFixedFormat(outputFileName, exportFormat, openAfterExport, wdExportOptimizeForPrint, wdExportAllDocument, from, to, wdExportDocumentContent, includeDocProps, keepIRM, wdExportCreateWordBookmarks, docStructureTags, bitmapMissingFonts, UseISO19005_1, ref missing);
            }
            result = true;
        }
        catch
        {
            result = false;
        }
        finally
        {
            if (document != null)
            {
                document.Close(ref missing, ref missing, ref missing);
                document = null;
            }
            if (applicationClass != null)
            {
                applicationClass.Quit(ref missing, ref missing, ref missing);
                applicationClass = null;
            }
        }
        return result;
    }

/// <summary>
    /// 把Word文件轉(zhuǎn)換成pdf文件
    /// </summary>
    /// <param name="sourcePath">需要轉(zhuǎn)換的文件路徑和文件名稱</param>
    /// <param name="targetPath">轉(zhuǎn)換完成后的文件的路徑和文件名名稱</param>
    /// <returns>成功返回true,失敗返回false</returns>
    public static bool WordToPdf(object sourcePath, string targetPath)
    {
        bool result = false;
        WdExportFormat wdExportFormatPDF = WdExportFormat.wdExportFormatPDF;
        object missing = Type.Missing;
        Microsoft.Office.Interop.Word.ApplicationClass applicationClass = null;
        Document document = null;
        try
        {
            applicationClass = new Microsoft.Office.Interop.Word.ApplicationClass();
            document = applicationClass.Documents.Open(ref sourcePath, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing);
            if (document != null)
            {
                document.ExportAsFixedFormat(targetPath, wdExportFormatPDF, false, WdExportOptimizeFor.wdExportOptimizeForPrint, WdExportRange.wdExportAllDocument, 0, 0, WdExportItem.wdExportDocumentContent, true, true, WdExportCreateBookmarks.wdExportCreateWordBookmarks, true, true, false, ref missing);
            }
            result = true;
        }
        catch
        {
            result = false;
        }
        finally
        {
            if (document != null)
            {
                document.Close(ref missing, ref missing, ref missing);
                document = null;
            }
            if (applicationClass != null)
            {
                applicationClass.Quit(ref missing, ref missing, ref missing);
                applicationClass = null;
            }
        }
        return result;
    }

OfficeToPdf.WordToPdf("d:\\1234.doc", "d:\\1234.pdf");