C#获取打印机状态

Question

class CSCPrintClass
    {
        public static string GetPrinterStatus(string PrinterName)
        {
            int intValue = GetPrinterStatusInt(PrinterName);
            string strRet = string.Empty;
            switch (intValue)
            {
                case 0:
                    strRet = "准备就绪（Ready）";
                    break;
                case 0x00000200:
                    strRet = "忙(Busy）";
                    break;
                case 0x00400000:
                    strRet = "被打开（Printer Door Open）";
                    break;
                case 0x00000002:
                    strRet = "错误(Printer Error）";
                    break;
                case 0x0008000:
                    strRet = "初始化(Initializing）";
                    break;
                case 0x00000100:
                    strRet = "正在输入,输出（I/O Active）";
                    break;
                case 0x00000020:
                    strRet = "手工送纸（Manual Feed）";
                    break;
                case 0x00040000:
                    strRet = "无墨粉（No Toner）";
                    break;
                case 0x00001000:
                    strRet = "不可用（Not Available）";
                    break;
                case 0x00000080:
                    strRet = "脱机（Off Line）";
                    break;
                case 0x00200000:
                    strRet = "内存溢出（Out of Memory）";
                    break;
                case 0x00000800:
                    strRet = "输出口已满（Output Bin Full）";
                    break;
                case 0x00080000:
                    strRet = "当前页无法打印（Page Punt）";
                    break;
                case 0x00000008:
                    strRet = "塞纸（Paper Jam）";
                    break;
                case 0x00000010:
                    strRet = "打印纸用完（Paper Out）";
                    break;
                case 0x00000040:
                    strRet = "纸张问题（Page Problem）";
                    break;
                case 0x00000001:
                    strRet = "暂停（Paused）";
                    break;
                case 0x00000004:
                    strRet = "正在删除（Pending Deletion）";
                    break;
                case 0x00000400:
                    strRet = "正在打印（Printing）";
                    break;
                case 0x00004000:
                    strRet = "正在处理（Processing）";
                    break;
                case 0x00020000:
                    strRet = "墨粉不足（Toner Low）";
                    break;
                case 0x00100000:
                    strRet = "需要用户干预（User Intervention）";
                    break;
                case 0x20000000:
                    strRet = "等待（Waiting）";
                    break;
                case 0x00010000:
                    strRet = "热机中（Warming Up）";
                    break;
                default:
                    strRet = "未知状态（Unknown Status）";
                    break;
            }
            return strRet;
        }        [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern bool OpenPrinter(string printer, out IntPtr handle, ref structPrinterDefaults pDefault);
        [DllImport("winspool.drv")]
        public static extern bool ClosePrinter(IntPtr handle);
        [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern bool GetPrinter(IntPtr handle, Int32 level, IntPtr buffer, Int32 size, out Int32 sizeNeeded);        internal static int GetPrinterStatusInt(string PrinterName)
        {
            int intRet = 0;
            IntPtr hPrinter;            
            structPrinterDefaults defaults = new structPrinterDefaults();
                        if (OpenPrinter(PrinterName, out hPrinter, ref defaults))
            {
                int cbNeeded = 0;
                bool bolRet = GetPrinter(hPrinter, 2, IntPtr.Zero, 0, out cbNeeded);
                if (cbNeeded > 0)
                {
                    IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded);
                    bolRet = GetPrinter(hPrinter, 2, pAddr, cbNeeded, out cbNeeded);
                    if (bolRet)
                    {
                        PRINTER_INFO_2 Info2 = new PRINTER_INFO_2();                        Info2 = (PRINTER_INFO_2)Marshal.PtrToStructure(pAddr, typeof(PRINTER_INFO_2));                        intRet = System.Convert.ToInt32(Info2.Status);
                    }
                    Marshal.FreeHGlobal(pAddr);
                }
                ClosePrinter(hPrinter);
            }            return intRet;
        }          [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        internal struct structPrinterDefaults
        {
            [MarshalAs(UnmanagedType.LPTStr)]
            public String pDatatype;
            public IntPtr pDevMode;
            [MarshalAs(UnmanagedType.I4)]
            public int DesiredAccess;
        };        //状态枚举
        [FlagsAttribute]
        internal enum PrinterStatus
        {
            PRINTER_STATUS_BUSY = 0x00000200,
            PRINTER_STATUS_DOOR_OPEN = 0x00400000,
            PRINTER_STATUS_ERROR = 0x00000002,
            PRINTER_STATUS_INITIALIZING = 0x00008000,
            PRINTER_STATUS_IO_ACTIVE = 0x00000100,
            PRINTER_STATUS_MANUAL_FEED = 0x00000020,
            PRINTER_STATUS_NO_TONER = 0x00040000,
            PRINTER_STATUS_NOT_AVAILABLE = 0x00001000,
            PRINTER_STATUS_OFFLINE = 0x00000080,
            PRINTER_STATUS_OUT_OF_MEMORY = 0x00200000,
            PRINTER_STATUS_OUTPUT_BIN_FULL = 0x00000800,
            PRINTER_STATUS_PAGE_PUNT = 0x00080000,
            PRINTER_STATUS_PAPER_JAM = 0x00000008,
            PRINTER_STATUS_PAPER_OUT = 0x00000010,
            PRINTER_STATUS_PAPER_PROBLEM = 0x00000040,
            PRINTER_STATUS_PAUSED = 0x00000001,
            PRINTER_STATUS_PENDING_DELETION = 0x00000004,
            PRINTER_STATUS_PRINTING = 0x00000400,
            PRINTER_STATUS_PROCESSING = 0x00004000,
            PRINTER_STATUS_TONER_LOW = 0x00020000,
            PRINTER_STATUS_USER_INTERVENTION = 0x00100000,
            PRINTER_STATUS_WAITING = 0x20000000,
            PRINTER_STATUS_WARMING_UP = 0x00010000
        }        public struct PRINTER_INFO_2
        {
            public string pServerName;
            public string pPrinterName;
            public string pShareName;
            public string pPortName;
            public string pDriverName;
            public string pComment;
            public string pLocation;
            public IntPtr pDevMode;
            public string pSepFile;
            public string pPrintProcessor;
            public string pDatatype;
            public string pParameters;
            public IntPtr pSecurityDescriptor;
            public UInt32 Attributes;
            public UInt32 Priority;
            public UInt32 DefaultPriority;
            public UInt32 StartTime;
            public UInt32 UntilTime;
            public UInt32 Status;
            public UInt32 cJobs;
            public UInt32 AveragePPM;
        }
        public static void Main()
        {
            Console.WriteLine(CSCPrintClass.GetPrinterStatus("EPSON LQ-680K II ESC/P2").ToString());
            Console.ReadLine();
        }
   }我现在遇到的问题是：
1，我打印机没有连接，调用OpenPrinter函数返回的也是true；
2，GetPrinter函数返回的一直是0（准备就绪（Ready））；
请各位能帮我解决，谢谢！！！     

Answer 1

http://hi.baidu.com/adaeniac/blog/item/332c69b576ae55c936d3ca07.html

Answer 2

真是 达叔， 换了别人 我肯定懒的看这么多代码了---------------------看这里： structPrinterDefaults defaults = new structPrinterDefaults();if (OpenPrinter(PrinterName, out hPrinter, ref defaults))----------------
你实例化了一个 structPrinterDefaults 对象。ref defaults  中的 defaults  你需要给它 赋 初始值这是 ref 和 out 的区别。你有给这个 defaults 赋值吗？？？

Answer 3

呵呵。 谢谢你的回答。。 structPrinterDefaults是一个我已经定义了的结构，而应该怎么赋值，不知道。

Answer 4

在　structPrinterDefaults中的参数（vb的赋值方式）pDatatype   String，打印机使用的默认数据类型的名字。可设为vbNullString，表示使用当前的默认配置
pDevMode  Long，打印机默认配置信息的一个地址。可设为零，表示使用当前默认设置
DesiredAccess  Long，PRINTER_ACCESS_ADMINISTER 或 PRINTER_ACCESS_USE，或者是一个常规的安全值（取决于您是需要配置打印机，还是仅仅访问它）但是我在C#里面不知道什么赋值；

Answer 5

http://support.microsoft.com/kb/322091/zh-cn此地址是写入数据到打印机，状态还是没有获取到

Answer 6

lou楼主问题解决了没有啊  我遇到了同样的问题 不知怎么弄 共享一下呗

Answer 7

都快1年了,,,, 我后来的做法是调用OPOS,,而OPOS内的stateUpdateEvent事件会返回一个状态,,再OPOS给的测试程序中,提到过那些状态码各自的意识.

Answer 8

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娘的，爷登了，还报这错，fuck!