C# 实现虚拟打印机 HP Color LaserJet 4500  1

 

无聊了研究了下PCL和HPGL两种语言。如果要实现虚拟打印机只使用.NET来做，驱动是最大的问题。其实我们可以使用已经写好的打印机驱动来实现。只是让驱动最终生成的打印语言输出到我们想要的位置。并且我们对打印语言进行模拟显示就可以。经过几天的研究发现HP Color LaserJet 4500 打印出的图形为PCL和HPGL的混合体。那就写个控制HP Color LaserJet 4500的程序进行控制并且把打印出的打印语言输出到我们想要的位置。

 

首先 先给系统添加打印机 HP Color LaserJet 4500

 

 

 

其他的设置不用管。用程序来控制把，免得配置复杂以后我自己都忘了怎么配置的。

思路  先给打印机更换端口 使用写注册表 把临时目录放做为打印端口 然后设置打印后保留文档 通过API  EnumJobs 获取打印任务 重新执行打印后获取临时文件 ，这里临时文件就是我们需要的PCL/HPGL文件（ ImagePRN 这个类 我暂时不贴出来） 因为包含两种打印语言所以这个东西的类我还的找个时间再整理下，到目前为止就10来个类了贴出来太累了。等整理后、成一个类后我会帖出来。

 效果图

 

 

不说了 先看代码把

测试使用代码

 

using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Drawing.Imaging; using System.Text; using System.Windows.Forms; using Zgke.Code; namespace WindowsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } /// <summary> /// 最终保存PCL文件的路径 /// </summary> private string p_FileDir = @"D:/temp/PCL/"; /// <summary> /// 打印控制器 /// </summary> private PrintControlSet m_SetControl; /// <summary> /// PCL文件里的文档 /// </summary> private IList<Image> m_PrintImageList; private void Form1_Load(object sender, EventArgs e) { string[] _Filelist = System.IO.Directory.GetFiles(p_FileDir, "*.PCL"); for (int i = 0; i != _Filelist.Length; i++) { listBox1.Items.Add(_Filelist[i]); } m_SetControl = new PrintControlSet("Zgke PrintOK", @"C:/1.PRN"); m_SetControl.PrintJobLoad += new PrintControlSet.PrintJobFile(_SetControl_PrintJobLoad); m_SetControl.SaveFileOver += new PrintControlSet.SaveOver(_SetControl_SaveFileOver); m_SetControl.StarMonitor(); } /// <summary> /// 文件复制完成后触发 /// </summary> /// <param name="p_FileName"></param> void _SetControl_SaveFileOver(string p_FileName) { this.Invoke((MethodInvoker)delegate { listBox1.Items.Add(p_FileName); }); } /// <summary> /// 需要处理时触发 这里可以根据需要写到数据库里。 我只用了日期 并没有使用档名 这个名字可能文件不能创建 /// </summary> /// <param name="p_Document"></param> /// <param name="p_PrintDateTime"></param> /// <param name="p_MachineName"></param> /// <param name="p_UserName"></param> /// <param name="p_PageCount"></param> /// <param name="p_PrintOK"></param> /// <param name="p_SaveFileName"></param> void _SetControl_PrintJobLoad(string p_Document, DateTime p_PrintDateTime, string p_MachineName, string p_UserName, int p_PageCount, out bool p_PrintOK, out string p_SaveFileName) { p_PrintOK = true; p_SaveFileName = p_FileDir +p_PrintDateTime.ToString("yyyyMMddHHmmssffff")+".PCL"; } private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { pictureBox1.Image = m_PrintImageList[comboBox1.SelectedIndex]; } private void listBox1_DoubleClick(object sender, EventArgs e) { if (listBox1.SelectedItem == null) return; comboBox1.Items.Clear(); ImagePRN _HPGL = new ImagePRN(listBox1.SelectedItem.ToString()); m_PrintImageList = _HPGL.PrintBitmap; for (int i = 0; i != m_PrintImageList.Count; i++) { comboBox1.Items.Add(i.ToString()); } if (m_PrintImageList.Count != 0) comboBox1.SelectedIndex = 0; } } }

 

下面是打印控制的类

using System; using System.Collections.Generic; using System.Text; using System.Drawing.Printing; using System.Threading; using System.Runtime.InteropServices; namespace Zgke.Code { /// <summary> /// zgke@sina.com /// qq:116149 /// 虚拟打印机控制器 /// </summary> public class PrintControlSet { // <summary> /// 保存文件 /// </summary> /// <param name="p_Document">文档名称</param> /// <param name="p_PrintDateTime">打印日期</param> /// <param name="p_MachineName">计算机名</param> /// <param name="p_UserName">用户名</param> /// <param name="p_PageCount">用户名</param> /// <param name="m_PrintOK">是否处理完成 如果为false 那下次监控还会触发这个</param> /// <param name="p_SaveFileName">保存PRN文件到指定的位置</param> public delegate void PrintJobFile(string p_Document,DateTime p_PrintDateTime,string p_MachineName,string p_UserName,int p_PageCount, out bool m_PrintOK,out string p_SaveFileName); /// <summary> /// 获取打印事件 /// </summary> public event PrintJobFile PrintJobLoad; /// <summary> /// 保存完成 /// </summary> /// <param name="p_FileName">复制完成后的文件位置</param> public delegate void SaveOver(string p_FileName); /// <summary> /// 保存完成 /// </summary> public event SaveOver SaveFileOver; /// <summary> /// 监视线程 /// </summary> private System.Timers.Timer m_Timer; /// <summary> /// 设置时间间隔 /// </summary> public double Interval { get { return m_Timer.Interval; } set { m_Timer.Interval = value; } } /// <summary> /// 打印器名称 /// </summary> private string m_PrintName = ""; /// <summary> /// 打印临时目录 /// </summary> private string m_TempFile = ""; /// <summary> /// 打印设置器 先去安装 HP Color LaserJet 4500 打印机 /// </summary> /// <param name="p_PrintName"></param> public PrintControlSet(string p_PrintName,string p_TempFile) { if (p_PrintName.Length == 0) throw new Exception("必须指定打印机名称！"); m_PrintName = p_PrintName; m_TempFile = p_TempFile; m_Timer = new System.Timers.Timer(); m_Timer.Interval = 1000; m_Timer.Elapsed += new System.Timers.ElapsedEventHandler(m_Timer_Elapsed); Microsoft.Win32.RegistryKey _Regisity = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWARE/Microsoft/Windows NT/CurrentVersion/Print/Printers"); string[] _PrintName =_Regisity.GetSubKeyNames(); for (int i = 0; i != _PrintName.Length; i++) { if (_PrintName[i] == m_PrintName) { AddPort(); SetPrintAttrib(); RestSpooler(); return; } } throw new Exception("无法找到对应的打印机！"); } /// <summary> /// 监控打印缓冲区 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> void m_Timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e) { m_Timer.Stop(); IntPtr _PrintIntPtr = IntPtr.Zero; IntPtr _PrintDefault = IntPtr.Zero; bool A = Win32API.OpenPrinter("Zgke PrintOK", out _PrintIntPtr, _PrintDefault); uint _dwNeeded; uint _dwReturned; for (int i = 0; i != 65535; i++) { IntPtr _JobIntPtr = Marshal.AllocHGlobal(1000); Win32API.EnumJobs(_PrintIntPtr, (uint)i, 1, 1, _JobIntPtr, 1000, out _dwNeeded, out _dwReturned); if (_dwReturned == 0) { Marshal.FreeHGlobal(_JobIntPtr); break; } JOB_INFO_1 _JobInfo = (JOB_INFO_1)Marshal.PtrToStructure(_JobIntPtr, typeof(JOB_INFO_1)); if (_JobInfo.Status != 128) { Marshal.FreeHGlobal(_JobIntPtr); continue; } DateTime _PrintTime = new DateTime(_JobInfo.Submitted.wYear, _JobInfo.Submitted.wMonth, _JobInfo.Submitted.wDay, _JobInfo.Submitted.wHour, _JobInfo.Submitted.wMinute, _JobInfo.Submitted.wSecond, _JobInfo.Submitted.wMilliseconds); if (PrintJobLoad != null) { bool _PrintOK = false; string _SaveFile = ""; PrintJobLoad(_JobInfo.pDocument, _PrintTime, _JobInfo.pMachineName, _JobInfo.pUserName, _JobInfo.TotalPages, out _PrintOK, out _SaveFile); if (_PrintOK) { int _State = Win32API.SetJob(_PrintIntPtr, _JobInfo.JobId, 0, IntPtr.Zero, JOB_CONTROL.JOB_CONTROL_RESTART); WaitForPrintOver(_PrintIntPtr, i); if (_SaveFile.Length != 0)System.IO.File.Copy(m_TempFile, _SaveFile, true); _State = Win32API.SetJob(_PrintIntPtr, _JobInfo.JobId, 0, IntPtr.Zero, JOB_CONTROL.JOB_CONTROL_CANCEL); if (SaveFileOver != null) SaveFileOver(_SaveFile); } Marshal.FreeHGlobal(_JobIntPtr); } } Win32API.ClosePrinter(_PrintIntPtr); m_Timer.Start(); } /// <summary> /// 等待打印完成 /// </summary> /// <param name="p_JobId">任务ID</param> public void WaitForPrintOver(IntPtr p_PrintIntPtr, int p_JobId) { while (true) { uint _dwNeeded; uint _dwReturned; IntPtr _JobIntPtr = Marshal.AllocHGlobal(1000); Win32API.EnumJobs(p_PrintIntPtr, (uint)p_JobId, 1, 1, _JobIntPtr, 1000, out _dwNeeded, out _dwReturned); if (_dwReturned != 0) { JOB_INFO_1 _JobInfo = (JOB_INFO_1)Marshal.PtrToStructure(_JobIntPtr, typeof(JOB_INFO_1)); if (_JobInfo.Status == 128) return; } System.Windows.Forms.Application.DoEvents(); Marshal.FreeHGlobal(_JobIntPtr); } } /// <summary> /// 添加一个端口 /// </summary> private void AddPort() { Microsoft.Win32.RegistryKey _Regisity = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWARE/Microsoft/Windows NT/CurrentVersion/Ports",true); string[] _ValueName = _Regisity.GetValueNames(); for (int i = 0; i != _ValueName.Length; i++) { if (_ValueName[i] == m_TempFile) return; } _Regisity.SetValue(m_TempFile, "", Microsoft.Win32.RegistryValueKind.String); } /// <summary> /// 设置打印机属性 /// </summary> private void SetPrintAttrib() { Microsoft.Win32.RegistryKey _Regisity = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWARE/Microsoft/Windows NT/CurrentVersion/Print/Printers/"+m_PrintName,true); int _Attrib = (int)_Regisity.GetValue("Attributes"); _Attrib |= 0x100; _Regisity.SetValue("Attributes", _Attrib); _Regisity.SetValue("Port", m_TempFile); } /// <summary> /// 重新启动服务 /// </summary> private void RestSpooler() { System.ServiceProcess.ServiceController[] _Spooler = System.ServiceProcess.ServiceController.GetServices(); for (int i = 0; i != _Spooler.Length; i++) { if (_Spooler[i].ServiceName == "Spooler") { if (_Spooler[i].Status != System.ServiceProcess.ServiceControllerStatus.Stopped) { _Spooler[i].Stop(); _Spooler[i].WaitForStatus(System.ServiceProcess.ServiceControllerStatus.Stopped); } _Spooler[i].Start(); _Spooler[i].WaitForStatus(System.ServiceProcess.ServiceControllerStatus.Running); } } } /// <summary> /// 开始监控 /// </summary> public void StarMonitor() { m_Timer.Start(); } /// <summary> /// 停止监控 /// </summary> public void StopMonitor() { m_Timer.Stop(); } } public class Win32API { [DllImport("winspool.drv", EntryPoint = "EnumJobsA")] public static extern bool EnumJobs(IntPtr hPrinter, uint FirstJob, uint NoJobs, uint Level, IntPtr pJob, uint cdBuf, out uint pcbNeeded, out uint pcReturned); [DllImport("winspool.drv", EntryPoint = "SetJob")] public static extern int SetJob(IntPtr hPrinter, int JobId, int Level, IntPtr pJob, JOB_CONTROL Command); [DllImport("winspool.drv", CharSet = CharSet.Auto)] public static extern bool OpenPrinter(string pPrinterName, out IntPtr phPrinter, IntPtr pDefault); [DllImport("winspool.drv", CharSet = CharSet.Auto)] public static extern bool ClosePrinter(IntPtr ptrPrinter); } public enum JOB_CONTROL { JOB_CONTROL_PAUSE = 1, JOB_CONTROL_RESUME = 2, JOB_CONTROL_CANCEL = 3, JOB_CONTROL_RESTART = 4 } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public struct JOB_INFO_1 { public int JobId; [MarshalAs(UnmanagedType.LPStr)] public string pPrinterName; [MarshalAs(UnmanagedType.LPStr)] public string pMachineName; [MarshalAs(UnmanagedType.LPStr)] public string pUserName; [MarshalAs(UnmanagedType.LPStr)] public string pDocument; [MarshalAs(UnmanagedType.LPStr)] public string pDatatype; [MarshalAs(UnmanagedType.LPStr)] public string pStatus; public int Status; public int Priority; public int Position; public int TotalPages; public int PagesPrinted; public SYSTEMTIME Submitted; } [StructLayout(LayoutKind.Sequential)] public struct SYSTEMTIME { public short wYear; public short wMonth; public short wDayOfWeek; public short wDay; public short wHour; public short wMinute; public short wSecond; public short wMilliseconds; } }

 

 下一篇 我会把PCL/HPGL的类贴出来。