优化数据传递

kingno

2025-06-09 305e2990bb2161177e87ab7711f9dfb205762bcd

 src/Bro.M141.Process/UI/UIPrinter.cs

@@ -2,6 +2,7 @@
using Bro.Common.Helper;
using Bro.Common.Interface;
using Bro.UI.Model.Winform;
using Sunny.UI;
using System;
using System.Collections.Generic;
using System.ComponentModel;
@@ -9,12 +10,15 @@
using System.Drawing;
using System.Drawing.Printing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using ZXing;
using ZXing.Common;
using static System.Windows.Forms.AxHost;

//using System.Printing;

namespace Bro.M141.Process
{
@@ -36,7 +40,12 @@
        {
            base.OnProcessUpdated();
            printDocument1.PrintPage += new PrintPageEventHandler(printDocument_Print);

            Process141.StartPrinter += StartPrint;
            textBox1.Text = "Broconcentric";
        }



        PrintDocument printDocument1 = new PrintDocument();
        int ttwith = (int)(80 * 4);
@@ -45,19 +54,37 @@

        public void StartPrint(string str)
        {
            ttwith = 320;
            ttheigh = 160;
            message = str;
            try
            {
                ttwith = 320;
                ttheigh = 160;
                message = str;

            this.printDocument1.DefaultPageSettings.PrinterSettings.PrinterName = "Honeywell PX240S (300 dpi)"; 
            this.printDocument1.DefaultPageSettings.PaperSize = new PaperSize("Custum", ttwith, ttheigh);
                if (string.IsNullOrEmpty(message))
                {
                    message = textBox1.Text;
                }

            this.printDocument1.PrintController = new System.Drawing.Printing.StandardPrintController();
            this.printDocument1.Print();
                this.printDocument1.DefaultPageSettings.PrinterSettings.PrinterName = "Honeywell PX240S (300 dpi)";
                this.printDocument1.DefaultPageSettings.PaperSize = new PaperSize("Custum", ttwith, ttheigh);

                this.printDocument1.PrintController = new System.Drawing.Printing.StandardPrintController();
                this.printDocument1.Print();

            }
            catch
            {

            }

            int statuscode = GetPrinterStatusCodeInt();
            string status = GetPrinterStatusMessage(statuscode);

            //Config141
            Process141.PlcwritePrinter(1520, 0);
            Process141.PlcwritePrinter(1510, 1);

        }


        private void printDocument_Print(object sender, PrintPageEventArgs e)
        {
            Font fntTxt = new Font("黑体", 15, System.Drawing.FontStyle.Bold);//正文文字               
@@ -65,14 +92,153 @@
            try
            {
                string numvalue = message;
                Bitmap bitmap = CreateCode(numvalue);

                int with = (ttwith - bitmap.Width) / 2 - 20;
                int heih = (ttheigh - bitmap.Height) / 2;
                float Scale = (float)0.95;
                int startX = 10;
                int startY = 25;

                //int length = 320 * Scale;
                //int height = 160 * Scale;
                var g = e.Graphics;

                Font font = new Font("Arial", 8 * Scale);//设置字体颜色
                Font font2 = new Font("Arial", 11 * Scale);//设置字体颜色
                Font font3 = new Font("Arial", 36 * Scale);//设置字体颜色
                Font font4 = new Font("Arial", 12 * Scale);//设置字体颜色


                Pen p = new Pen(Color.Black, Scale);//定义了一个黑色,宽度为1的画笔
                g.Clear(Color.White);
                g.DrawRectangle(p, startX * Scale, startY * Scale, 70 * Scale, 20 * Scale);//在画板上画矩形,起始坐标为(10,10),宽为80,高为20
                g.DrawRectangle(p, startX * Scale, startY * Scale, 280 * Scale, 20 * Scale);//在画板上画矩形,起始坐标为(90,10),宽为80,高为20
                g.DrawString("厂商", font, brush, (startX + 20) * Scale, (startY + 5) * Scale);//
                g.DrawString("嘉彰科技", font2, brush, (startX + 140) * Scale, (startY + 4) * Scale);


                //第二行数据
                g.DrawRectangle(p, startX * Scale, (startY + 20) * Scale, 70 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 20) * Scale, 280 * Scale, 20 * Scale);
                g.DrawString("品名", font, brush, (startX + 20) * Scale, (startY + 25) * Scale);
                g.DrawString(@"COVER LG208H-RC100 #2", font4, brush, (startX + 71) * Scale, (startY + 22) * Scale);

                //第三行数据
                g.DrawRectangle(p, startX * Scale, (startY + 40) * Scale, 70 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 40) * Scale, 280 * Scale, 20 * Scale);
                g.DrawString("料号", font, brush, (startX + 20) * Scale, (startY + 45) * Scale);
                g.DrawString(@"436LG208I000", font2, brush, (startX + 130) * Scale, (startY + 43) * Scale);

                //第四行数据
                g.DrawRectangle(p, startX * Scale, (startY + 60) * Scale, 70 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 60) * Scale, 210 * Scale, 20 * Scale);
                g.DrawString("数量", font, brush, (startX + 20) * Scale, (startY + 65) * Scale);
                g.DrawString(@"50PCS", font2, brush, (startX + 120) * Scale, (startY + 62) * Scale);

                //第五行数据
                g.DrawRectangle(p, startX * Scale, (startY + 80) * Scale, 70 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 80) * Scale, 210 * Scale, 20 * Scale);
                g.DrawString("生产日期", font, brush, (startX + 10) * Scale, (startY + 85) * Scale);
                g.DrawString($"{DateTime.Now.ToString("yyyy.MM.dd")}", font2, brush, (startX + 105) * Scale, (startY + 82) * Scale);

                //第六行数据
                g.DrawRectangle(p, startX * Scale, (startY + 100) * Scale, 70 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 100) * Scale, 140 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 100) * Scale, 210 * Scale, 20 * Scale);
                g.DrawString("MARK1", font, brush, (startX + 15) * Scale, (startY + 104) * Scale);
                g.DrawString("MARK2", font, brush, (startX + 155) * Scale, (startY + 104) * Scale);


                //侧面
                g.DrawRectangle(p, (startX + 210) * Scale, (startY + 60) * Scale, 70 * Scale, 60 * Scale);
                g.DrawString(@"#2", font3, brush, (startX + 210) * Scale, (startY + 62) * Scale);
            }
            catch (Exception ee)
            {
                MessageBox.Show(ee.Message);
            }
        }

        private void printDocument_Print222(object sender, PrintPageEventArgs e)
        {
            Font fntTxt = new Font("黑体", 15, System.Drawing.FontStyle.Bold);//正文文字               
            System.Drawing.Brush brush = new SolidBrush(System.Drawing.Color.Black);//画刷           
            try
            {
                string numvalue = message;
                //Bitmap bitmap = getexcel();// CreateCode(numvalue);

                //int with = (ttwith - bitmap.Width) / 2 - 20;
                //int heih = (ttheigh - bitmap.Height) / 2;
                //條碼的位置
                e.Graphics.DrawImage(bitmap, new System.Drawing.Point(with, heih));
                //e.Graphics.DrawImage(bitmap, new System.Drawing.Point(0, 0));
                //條碼信息數字的位置
                e.Graphics.DrawString(numvalue, fntTxt, brush, new System.Drawing.Point(bitmap.Width / 4 + with - 10, heih + bitmap.Height + 5));
                //e.Graphics.DrawString(numvalue, fntTxt, brush, new System.Drawing.Point(bitmap.Width / 4 + with - 10, heih + bitmap.Height + 5));


                //e.Graphics.DrawImage(img, new Rectangle(25, 25, bmpwidth, bmpheight), new Rectangle(0, 0, img.Width, img.Height), GraphicsUnit.Pixel);
                int Scale = 1;
                int startX = 10;
                int startY = 25;

                int length = 320 * Scale;
                int height = 160 * Scale;
                var g = e.Graphics;

                Font font = new Font("Arial", 8 * Scale);//设置字体颜色
                Font font2 = new Font("Arial", 11 * Scale);//设置字体颜色
                Font font3 = new Font("Arial", 36 * Scale);//设置字体颜色
                Font font4 = new Font("Arial", 12 * Scale);//设置字体颜色


                //SolidBrush brush = new SolidBrush(Color.Black);//新建一个画刷,到这里为止,我们已经准备好了画板、画刷、和数据


                Pen p = new Pen(Color.Black, Scale);//定义了一个黑色,宽度为1的画笔
                g.Clear(Color.White); //设置白色背景
                                      //第一行数据
                g.DrawRectangle(p, startX * Scale, startY * Scale, 70 * Scale, 20 * Scale);//在画板上画矩形,起始坐标为(10,10),宽为80,高为20
                g.DrawRectangle(p, startX * Scale, startY * Scale, 280 * Scale, 20 * Scale);//在画板上画矩形,起始坐标为(90,10),宽为80,高为20
                g.DrawString("厂商", font, brush, (startX + 20) * Scale, (startY + 5) * Scale);//
                g.DrawString("嘉彰科技", font2, brush, (startX + 140) * Scale, (startY + 4) * Scale);


                //第二行数据
                g.DrawRectangle(p, startX * Scale, (startY + 20) * Scale, 70 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 20) * Scale, 280 * Scale, 20 * Scale);
                g.DrawString("品名", font, brush, (startX + 20) * Scale, (startY + 25) * Scale);
                g.DrawString(@"COVER LG208H-RC100 #2", font4, brush, (startX + 71) * Scale, (startY + 22) * Scale);

                //第三行数据
                g.DrawRectangle(p, startX * Scale, (startY + 40) * Scale, 70 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 40) * Scale, 280 * Scale, 20 * Scale);
                g.DrawString("料号", font, brush, (startX + 20) * Scale, (startY + 45) * Scale);
                g.DrawString(@"436LG208I000", font2, brush, (startX + 130) * Scale, (startY + 43) * Scale);

                //第四行数据
                g.DrawRectangle(p, startX * Scale, (startY + 60) * Scale, 70 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 60) * Scale, 210 * Scale, 20 * Scale);
                g.DrawString("数量", font, brush, (startX + 20) * Scale, (startY + 65) * Scale);
                g.DrawString(@"50PCS", font2, brush, (startX + 120) * Scale, (startY + 62) * Scale);

                //第五行数据
                g.DrawRectangle(p, startX * Scale, (startY + 80) * Scale, 70 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 80) * Scale, 210 * Scale, 20 * Scale);
                g.DrawString("生产日期", font, brush, (startX + 10) * Scale, (startY + 85) * Scale);
                g.DrawString($"{DateTime.Now.ToString("yyyy.MM.dd")}", font2, brush, (startX + 105) * Scale, (startY + 82) * Scale);

                //第六行数据
                g.DrawRectangle(p, startX * Scale, (startY + 100) * Scale, 70 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 100) * Scale, 140 * Scale, 20 * Scale);
                g.DrawRectangle(p, startX * Scale, (startY + 100) * Scale, 210 * Scale, 20 * Scale);
                g.DrawString("MARK1", font, brush, (startX + 15) * Scale, (startY + 104) * Scale);
                g.DrawString("MARK2", font, brush, (startX + 155) * Scale, (startY + 104) * Scale);


                //侧面
                g.DrawRectangle(p, (startX + 210) * Scale, (startY + 60) * Scale, 70 * Scale, 60 * Scale);
                g.DrawString(@"#2", font3, brush, (startX + 210) * Scale, (startY + 62) * Scale);




            }
            catch (Exception ee)
@@ -124,12 +290,359 @@
                return;
            }
            PrintPreviewDialog printPreviewDialog1 = new PrintPreviewDialog();
            this.printDocument1.DefaultPageSettings.PrinterSettings.PrinterName = "Honeywell PX240 (300 dpi)";
            this.printDocument1.DefaultPageSettings.PrinterSettings.PrinterName = "Honeywell PX240S (300 dpi)";
            this.printDocument1.DefaultPageSettings.PaperSize = new PaperSize("Custum", ttwith, ttheigh);
            this.printDocument1.PrintPage += new PrintPageEventHandler(this.printDocument_Print);
            //this.printDocument1.PrintPage += new PrintPageEventHandler(this.printDocument_Print);
            printPreviewDialog1.Document = printDocument1;
            DialogResult res = printPreviewDialog1.ShowDialog();
            printPreviewDialog1.Document.Dispose();
        }



        public Bitmap getexcel()
        {


            int startX = 10;
            int startY = 25;

            int Scale = 1;

            int length = 320 * Scale;
            int height = 160 * Scale;

            Bitmap bmp = new Bitmap(length, height);//, System.Drawing.Imaging.PixelFormat.Format32bppArgb);//新建一个图片对象

            //bmp.SetResolution(320, 160);

            Graphics g = Graphics.FromImage(bmp);//利用该图片对象生成“画板”

            Font font = new Font("Arial", 8 * Scale);//设置字体颜色
            Font font2 = new Font("Arial", 11 * Scale);//设置字体颜色
            Font font3 = new Font("Arial", 36 * Scale);//设置字体颜色
            Font font4 = new Font("Arial", 12 * Scale);//设置字体颜色


            SolidBrush brush = new SolidBrush(Color.Black);//新建一个画刷,到这里为止,我们已经准备好了画板、画刷、和数据

            //g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            //g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            //g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;


            //g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;
            //g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            //g.PixelOffsetMode = PixelOffsetMode.Half;


            Pen p = new Pen(Color.Black, Scale);//定义了一个黑色,宽度为1的画笔
            g.Clear(Color.White); //设置白色背景
            //第一行数据
            g.DrawRectangle(p, startX * Scale, startY * Scale, 70 * Scale, 20 * Scale);//在画板上画矩形,起始坐标为(10,10),宽为80,高为20
            g.DrawRectangle(p, startX * Scale, startY * Scale, 280 * Scale, 20 * Scale);//在画板上画矩形,起始坐标为(90,10),宽为80,高为20
            g.DrawString("厂商", font, brush, (startX + 20) * Scale, (startY + 5) * Scale);//
            g.DrawString("嘉彰科技", font2, brush, (startX + 140) * Scale, (startY + 4) * Scale);


            //第二行数据
            g.DrawRectangle(p, startX * Scale, (startY + 20) * Scale, 70 * Scale, 20 * Scale);
            g.DrawRectangle(p, startX * Scale, (startY + 20) * Scale, 280 * Scale, 20 * Scale);
            g.DrawString("品名", font, brush, (startX + 20) * Scale, (startY + 25) * Scale);
            g.DrawString(@"COVER LG208H-RC100 #2", font4, brush, (startX + 71) * Scale, (startY + 22) * Scale);

            //第三行数据
            g.DrawRectangle(p, startX * Scale, (startY + 40) * Scale, 70 * Scale, 20 * Scale);
            g.DrawRectangle(p, startX * Scale, (startY + 40) * Scale, 280 * Scale, 20 * Scale);
            g.DrawString("料号", font, brush, (startX + 20) * Scale, (startY + 45) * Scale);
            g.DrawString(@"436LG208I000", font2, brush, (startX + 130) * Scale, (startY + 43) * Scale);

            //第四行数据
            g.DrawRectangle(p, startX * Scale, (startY + 60) * Scale, 70 * Scale, 20 * Scale);
            g.DrawRectangle(p, startX * Scale, (startY + 60) * Scale, 210 * Scale, 20 * Scale);
            g.DrawString("数量", font, brush, (startX + 20) * Scale, (startY + 65) * Scale);
            g.DrawString(@"50PCS", font2, brush, (startX + 120) * Scale, (startY + 62) * Scale);

            //第五行数据
            g.DrawRectangle(p, startX * Scale, (startY + 80) * Scale, 70 * Scale, 20 * Scale);
            g.DrawRectangle(p, startX * Scale, (startY + 80) * Scale, 210 * Scale, 20 * Scale);
            g.DrawString("生产日期", font, brush, (startX + 10) * Scale, (startY + 85) * Scale);
            g.DrawString($"{DateTime.Now.ToString("yyyy.MM.dd")}", font2, brush, (startX + 105) * Scale, (startY + 82) * Scale);

            //第六行数据
            g.DrawRectangle(p, startX * Scale, (startY + 100) * Scale, 70 * Scale, 20 * Scale);
            g.DrawRectangle(p, startX * Scale, (startY + 100) * Scale, 140 * Scale, 20 * Scale);
            g.DrawRectangle(p, startX * Scale, (startY + 100) * Scale, 210 * Scale, 20 * Scale);
            g.DrawString("MARK1", font, brush, (startX + 15) * Scale, (startY + 104) * Scale);
            g.DrawString("MARK2", font, brush, (startX + 155) * Scale, (startY + 104) * Scale);


            //侧面
            g.DrawRectangle(p, (startX + 210) * Scale, (startY + 60) * Scale, 70 * Scale, 60 * Scale);
            g.DrawString(@"#2", font3, brush, (startX + 210) * Scale, (startY + 62) * Scale);





            //Font font22 = new Font("Arial", 6);//设置字体颜色
            //for (int i = 0; i < 32;i++) 
            //{
            //    g.DrawString(i.ToString(), font22, brush, 0, i*10);
            //    g.DrawString(i.ToString(), font22, brush, i * 10, 0);
            //}

            //bmp.Save("E:/test.bmp");//保存为输出流，否则页面上显示不出来
            g.Dispose();//释放掉该资源

            bmp.SetResolution(105 * Scale, 105 * Scale);


            return bmp;
        }












        #region 
        [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern bool OpenPrinter(string pPrinterName, out IntPtr hPrinter, IntPtr pDefault);


        [DllImport("winspool.drv", SetLastError = true)]
        private static extern bool ClosePrinter(IntPtr hPrinter);


        [DllImport("winspool.drv", SetLastError = true)]
        private static extern bool GetPrinter(IntPtr hPrinter,
            int dwLevel, IntPtr pPrinter, int cbBuf, out int pcbNeeded);


        [DllImport("winspool.drv", CharSet = CharSet.Auto)]
        public static extern int EnumJobs(IntPtr hPrinter, int FirstJob, int NoJobs, int Level, IntPtr pInfo, int cdBuf,
                                  out int pcbNeeded, out int pcReturned);


        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
        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 uint Attributes;
            public uint Priority;
            public uint DefaultPriority;
            public uint StartTime;
            public uint UntilTime;
            public uint Status;
            public uint cJobs;
            public uint AveragePPM;
        }

        /// <summary>
        /// 默认打印机的名称
        /// </summary>
        //private static string printerName = new LocalPrintServer().DefaultPrintQueue.Name;
        private static string printerName = "Honeywell PX240S (300 dpi)";

        /// <summary>
        /// 获取打印机的状态编码(方式1)
        /// </summary>
        /// <returns></returns>
        public static int GetPrinterStatusCodeInt()
        {
            int intRet = -1;
            IntPtr hPrinter;


            if (OpenPrinter(printerName, out hPrinter, IntPtr.Zero))
            {
                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;
        }
        /// <summary>
        /// 检查打印机是否可用(方式1)
        /// </summary>
        /// <param name="intStatusCodeValue"></param>
        /// <returns></returns>
        public static bool CheckIsEnable(int intStatusCodeValue)
        {
            bool isEnable = false;
            if (UIPrinter.GetTaskNumber() == 0)
            {
                return true;
            }
            if (intStatusCodeValue == 0x0008000 || intStatusCodeValue == 0x00000400 || intStatusCodeValue == 0x00004000)
            {
                return true;
            }
            return isEnable;
        }


        /// <summary>
        /// 获取打印机的状态信息(方式1)
        /// </summary>
        /// <returns></returns>
        public static string GetPrinterStatusMessage(int intStatusCodeValue)
        {
            string strRet = string.Empty;
            switch (intStatusCodeValue)
            {
                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;
                case 1048706:
                    strRet = "色带已用尽";
                    break;
                default:
                    strRet = "未知状态（Unknown Status）";
                    break;
            }
            return strRet;
        }

        /// <summary>
        /// 获取打印机正在打印的任务数(方式1)
        /// </summary>
        /// <returns></returns>
        public static int GetTaskNumber()
        {
            IntPtr handle;
            int FirstJob = 0;
            int NumJobs = 127;
            int pcbNeeded;
            int pcReturned = -1;
            OpenPrinter(printerName, out handle, IntPtr.Zero);
            // get num bytes required, here we assume the maxt job for the printer quest is 128 (0..127)
            EnumJobs(handle, FirstJob, NumJobs, 1, IntPtr.Zero, 0, out pcbNeeded, out pcReturned);

            // allocate unmanaged memory
            IntPtr pData = Marshal.AllocHGlobal(pcbNeeded);

            // get structs
            EnumJobs(handle, FirstJob, NumJobs, 1, pData, pcbNeeded, out pcbNeeded, out pcReturned);

            return pcReturned;
        }
        #endregion


        private void button3_Click(object sender, EventArgs e)
        {
            int taskNum = GetTaskNumber();
            int statuscode = GetPrinterStatusCodeInt();
            string status = GetPrinterStatusMessage(statuscode);
            //只有在打印机异常时再次下发打印任务后，才能获取到打印机状态。这是因为打印机驱动程序通常只在处理打印请求时更新其状态信息。如果打印机没有接收到新的打印任务，可能无法立即反映出真实状态。
            textBox2.Text = "taskNum:" + taskNum + ",statuscode:" + statuscode + ",status:" + status;
        }
    }
}