PDF转换为图片的 windows服务

 

 

 

1.新建一windows服务工程，添加服务文件PDFConverter

 

partial class PDFConverter : ServiceBase
    {
        public PDFConverter()
        {
            InitializeComponent();
        }
        private System.Timers.Timer timer;
        protected override void OnStart(string[] args)
        {
            timer = new System.Timers.Timer(2000);
            timer.Elapsed += new ElapsedEventHandler(timer_Elapsed);
            timer.Start();
        }

        void timer_Elapsed(object sender, ElapsedEventArgs e)
        {
            Thread thread = new Thread(new ThreadStart(Process));
            thread.SetApartmentState(ApartmentState.STA);
            thread.Start();
        }

        protected override void OnStop()
        {
            timer.Stop();
        }

        [STAThread]
        protected void Process()
        {
            string pdfFilePath = ConfigurationManager.AppSettings["pdfFilepath"];
            string imagePath = ConfigurationManager.AppSettings["imageFilepath"];
            DirectoryInfo directory = new DirectoryInfo(pdfFilePath);
            if (directory == null)
                return;
            if (!Directory.Exists(imagePath))
                Directory.CreateDirectory(imagePath);
            FileInfo[] files = directory.GetFiles("*.pdf");
            if (files.Length > 0)
            {
                foreach (FileInfo file in files)
                {
                    if (file.FullName.EndsWith(".pdf"))
                    {
                        string pdfFileName = imagePath + file.Name;
                        if (!File.Exists(pdfFileName) || File.GetCreationTime(pdfFileName) < file.CreationTime)
                        {
                            IDataObject data = Clipboard.GetDataObject();
                            File.Copy(file.FullName, pdfFileName, true);
                            AcroPDDoc doc = new AcroPDDoc();
                            doc.Open(file.FullName);
                            int pageCount = doc.GetNumPages();
                            for (int i = 0; i < pageCount; i++)
                            {
                                AcroPDPage page = (AcroPDPage)doc.AcquirePage(i);
                                AcroPoint point = (AcroPoint)page.GetSize();
                                AcroRectClass rect = new AcroRectClass();
                                rect.Top = rect.Left = 0;
                                rect.right = point.x;
                                rect.bottom = point.y;
                                try
                                {
                                    bool ok = page.CopyToClipboard(rect, 0, 0, 100);
                                    if (ok)
                                    {
                                        IDataObject pdfData = Clipboard.GetDataObject();
                                        string[] formats = pdfData.GetFormats();
                                        Bitmap bitmap = (Bitmap)pdfData.GetData(DataFormats.Bitmap);
                                        if (bitmap != null)
                                        {
                                            bitmap.Save(imagePath + file.Name.Substring(0, file.Name.Length - 4) + i.ToString() + ".jpg");
                                            bitmap.Dispose();
                                        }
                                    }
                                }
                                catch { }
                                finally
                                {
                                    Marshal.ReleaseComObject(page);
                                    Marshal.ReleaseComObject(point);
                                }
                            }
                            Clipboard.Clear();
                            Marshal.ReleaseComObject(doc);
                            if (data != null)
                                Clipboard.SetDataObject(data);
                        }
                    }
                }
            }
        }
    }

2.增加InstallerClass文件

[RunInstaller(true)]
    public partial class ProjectInstaller : Installer
    {
        public ProjectInstaller()
        {
            InitializeComponent();
        }

        private void ProjectInstaller_AfterInstall(object sender, InstallEventArgs e)
        {
            RegistryKey rk = Registry.LocalMachine;
            string key = @"SYSTEM\CurrentControlSet\Services\" + this.serviceInstaller1.ServiceName;
            RegistryKey sub = rk.CreateSubKey(key);
            sub.CreateSubKey("Type");
            int value = (int)sub.GetValue("Type");
            sub.SetValue("Type", value | 256);
        }
    }

3.增加一个Setup工程创建安装程序，安装服务后配置AppConfig.config中的目录信息，启动服务。每隔2s服务检查PDF文件目录对新增文件自动进行转换。

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <appSettings>
        <add key="pdfFilepath" value="D:\PDFPath\"/>
        <add key="imageFilepath" value="D:\ImagePath\"/>
    </appSettings>
</configuration>