public bool WordToPDF(string sourcePath)

        {

            bool result = false;

            Microsoft.Office.Interop.Word.Application application = new Microsoft.Office.Interop.Word.Application();

            Microsoft.Office.Interop.Word.Document document = null;

            try

            {

                application.Visible = false;

                document = application.Documents.Open(sourcePath);

                string PDFPath = sourcePath.Replace(".doc", ".pdf");//pdf存放位置

                if (!File.Exists(@PDFPath))//存在PDF，不需要继续转换

                {

                    document.ExportAsFixedFormat(PDFPath, Microsoft.Office.Interop.Word.WdExportFormat.wdExportFormatPDF);

                }

                result = true;

            }

            catch (Exception e)

            {

                Console.WriteLine(e.Message);

                result = false;

            }

            finally

            {

                document.Close();

            }

            return result;

        }