C#使用PrintDocument打印 多页 打印预览

  PrintDocument实例所有的订阅事件如下：

1. 创建一个PrintDocument的实例.如下： System.Drawing.Printing.PrintDocument docToPrint =     new System.Drawing.Printing.PrintDocument();
2. 设置打印机开始打印的事件处理函数.函数原形如下： void docToPrint_PrintPage(object sender,     System.Drawing.Printing.PrintPageEventArgs e)
3. 将事件处理函数添加到PrintDocument的PrintPage事件中。 docToPrint.PrintPage+=new PrintPageEventHandler(docToPrint_PrintPage);
4. 设置PrintDocument的相关属性，如： PrintDialog1.AllowSomePages = true;PrintDialog1.ShowHelp = true;
5. 把PrintDialog的Document属性设为上面配置好的PrintDocument的实例： PrintDialog1.Document = docToPrint;
6. 调用PrintDialog的ShowDialog函数显示打印对话框： DialogResult result = PrintDialog1.ShowDialog();
7. 根据用户的选择，开始打印： if (result==DialogResult.OK)    {     docToPrint.Print();    }
8. 打印预览控件PrintPreviewDialog
9. PrintPreviewControl 在窗体中添加打印预览

例子如下：

使用时先创建PrintService类的实例，然后调用void StartPrint(Stream streamToPrint,string streamType)函数开始打印。其中streamToPrint是要打印的内容（字节流），streamType是流的类型（txt表示普通文本，image表示图像）；

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Drawing.Printing;
using System.Windows.Forms;
using System.Drawing;

namespace ConsoleApplication1
{
    public partial class PrintTxt:Form
    {


          private   PrintPreviewDialog PrintPreview = new PrintPreviewDialog();
          private   string    StreamType;
          private   Image image = null;
          private   Stream StreamToPrint = null;
          Font mainFont = new Font("宋体", 12);//打印的字体
          public string Filename =null;


        //1、实例化打印文档
        PrintDocument pdDocument = new PrintDocument();
        private string[] lines;
        private PrintPreviewControl printPreviewControl1;

        public PrintTxt()
        {
            InitializeComponent();

        }
        private int linesPrinted;


        public PrintTxt(string filepath,string filetype):this()
        {


             Filename = Path.GetFileNameWithoutExtension(filepath);

            //订阅BeginPrint事件
            pdDocument.BeginPrint += new PrintEventHandler(pdDocument_BeginPrint);
            //訂閱EndPrint事件，释放资源


            pdDocument.PrintPage += new PrintPageEventHandler(OnPrintPage);


            //订阅Print打印事件,该方法必须放在订阅打印事件的最后
            FileStream fs = new FileStream(filepath, FileMode.Open, FileAccess.Read);
            StartPrint(fs, filetype);



            //打印结束
            pdDocument.EndPrint += new PrintEventHandler(pdDocument_EndPrint);



        }

        //2、启动Print打印方法
        public   void StartPrint(Stream streamToPrint, string streamType)
        {

            //声明返回值的PageSettings A4/A5
            PageSettings ps = new PageSettings();

            //显示设置打印页对话框
            PageSetupDialog Psdl = new PageSetupDialog();

            //打印多页设置
            PrintDialog pt = new PrintDialog();
            pt.AllowCurrentPage = true;
            pt.AllowSomePages = true;
            pt.AllowPrintToFile = true;





            printPreviewControl1.Document = pdDocument;//form中的打印预览
            printPreviewControl1.Zoom = 1.0;
            printPreviewControl1.Dock = DockStyle.Fill;
            printPreviewControl1.UseAntiAlias = true;


            StreamToPrint = streamToPrint;//打印的字节流
            StreamType = streamType; //打印的类型
            pdDocument.DocumentName = Filename; //打印的文件名


            Psdl.Document = pdDocument;
            PrintPreview.Document = pdDocument;
            PrintPreview.SetDesktopLocation(300, 800);
            Psdl.PageSettings = pdDocument.DefaultPageSettings;
            pt.Document = pdDocument;





            try
            {
                //显示对话框

                if (Psdl.ShowDialog() == DialogResult.OK)
                {
                    ps = Psdl.PageSettings;
                    pdDocument.DefaultPageSettings = Psdl.PageSettings;
                }

                if (pt.ShowDialog() == DialogResult.OK)
                {
                    pdDocument.PrinterSettings.Copies = pt.PrinterSettings.Copies;
                }


                if (PrintPreview.ShowDialog() == DialogResult.OK)
                    //调用打印
                    pdDocument.Print();


                 // PrintDocument对象的Print()方法在PrintController类中执行PrintPage事件。
                 //
            }
            catch (InvalidPrinterException ex)
            {
                MessageBox.Show(ex.Message, "Simple Editor", MessageBoxButtons.OK, MessageBoxIcon.Error);
                throw;
            }
        }

        /// <summary>
        /// 3、得到打印內容
        /// 每个打印任务只调用OnBeginPrint()一次。
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void pdDocument_BeginPrint(object sender, PrintEventArgs e)
        {
            char[] param = { '/n' };
            char[] trimParam = { '/r' };//回车

            switch (StreamType)
            {
                case "txt":
                    StringBuilder text = new StringBuilder();
                    System.IO.StreamReader streamReader = new StreamReader(StreamToPrint, Encoding.Default);
                    while (streamReader.Peek() >= 0)
                    {
                        lines = streamReader.ReadToEnd().Split(param);
                        for (int i = 0; i < lines.Length; i++)
                        {
                            lines[i] = lines[i].TrimEnd(trimParam);
                        }
                    }

                    break;
                case "image":
                    image = System.Drawing.Image.FromStream(StreamToPrint);
                    break;
                default:
                    break;
            }

        }



        /// <summary>
        /// 4、绘制多个打印界面
        /// printDocument的PrintPage事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnPrintPage(object sender, PrintPageEventArgs e)
        {
            int leftMargin = Convert.ToInt32((e.MarginBounds.Left) * 3 / 4);　 //左边距
            int topMargin = Convert.ToInt32(e.MarginBounds.Top * 2 / 3);　　　 //顶边距
            switch (StreamType)
            {
                case "txt":
                    while (linesPrinted < lines.Length)
                    {
                        //向画布中填写内容
                        e.Graphics.DrawString(lines[linesPrinted++], new Font("Arial", 10), Brushes.Black, leftMargin, topMargin, new StringFormat());

                        topMargin += 55;//行高为55，可调整

                        //走纸换页
                        if (topMargin >= e.PageBounds.Height - 60)//页面累加的高度大于页面高度。根据自己需要，可以适当调整
                        {
                            //如果大于设定的高
                            e.HasMorePages = true;
                            printPreviewControl1.Rows += 1;//窗体的打印预览窗口页面自动加1
                             /*
                             * PrintPageEventArgs类的HaeMorePages属性为True时，通知控件器，必须再次調用OnPrintPage()方法，打印一个页面。
                             * PrintLoopI()有一个用於每个要打印的页面的序例。如果HasMorePages是False，PrintLoop()就会停止。
                             */
                            return;
                        }
                    }

                    break;
                case "image"://一下涉及剪切图片,
                    int width = image.Width;
                    int height = image.Height;
                    if ((width / e.MarginBounds.Width) > (height / e.MarginBounds.Height))
                    {
                        width = e.MarginBounds.Width;
                        height = image.Height * e.MarginBounds.Width / image.Width;
                    }
                    else
                    {
                        height = e.MarginBounds.Height;
                        width = image.Width * e.MarginBounds.Height / image.Height;
                    }

                    System.Drawing.Rectangle destRect = new System.Drawing.Rectangle(topMargin, leftMargin, width, height);
                    //向画布写入图片
                    for (int i = 0; i < Convert.ToInt32(Math.Floor((double)image.Height/ 820)) + 1; i++)
                    {

                        e.Graphics.DrawImage(image, destRect, i*820,i*1170 , image.Width, image.Height, System.Drawing.GraphicsUnit.Pixel);
                        //走纸换页
                        if (i * 1170 >= e.PageBounds.Height - 60)//页面累加的高度大于页面高度。根据自己需要，可以适当调整
                        {
                            //如果大于设定的高
                            e.HasMorePages = true;
                            printPreviewControl1.Rows += 1;//窗体的打印预览窗口页面自动加1
                            /*
                            * PrintPageEventArgs类的HaeMorePages属性为True时，通知控件器，必须再次調用OnPrintPage()方法，打印一个页面。
                            * PrintLoopI()有一个用於每个要打印的页面的序例。如果HasMorePages是False，PrintLoop()就会停止。
                            */
                            return;
                        }
                    }

                    break;
            }

            //打印完毕后，画线条，且注明打印日期
            e.Graphics.DrawLine(new Pen(Color.Black), leftMargin, topMargin, e.MarginBounds.Right, topMargin);

            string strdatetime = DateTime.Now.ToLongDateString() + DateTime.Now.ToLongTimeString();
            e.Graphics.DrawString(string.Format("打印时间：{0}", strdatetime), mainFont, Brushes.Black, e.MarginBounds.Right-240, topMargin+40, new StringFormat());
            linesPrinted = 0;
            //绘制完成后，关闭多页打印功能
            e.HasMorePages = false;

        }


        /// <summary>
        ///5、EndPrint事件,释放资源
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void pdDocument_EndPrint(object sender, PrintEventArgs e)
        {

            //变量Lines占用和引用的字符串数组，现在释放
            lines = null;
        }

        private void InitializeComponent()
        {
            this.printPreviewControl1 = new System.Windows.Forms.PrintPreviewControl();
            this.SuspendLayout();
            //
            // printPreviewControl1
            //
            this.printPreviewControl1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
                        | System.Windows.Forms.AnchorStyles.Left)
                        | System.Windows.Forms.AnchorStyles.Right)));
            this.printPreviewControl1.Location = new System.Drawing.Point(12, 3);
            this.printPreviewControl1.Name = "printPreviewControl1";
            this.printPreviewControl1.Size = new System.Drawing.Size(685, 511);
            this.printPreviewControl1.TabIndex = 0;
            //
            // PrintTxt
            //
            this.ClientSize = new System.Drawing.Size(696, 526);
            this.Controls.Add(this.printPreviewControl1);
            this.Name = "PrintTxt";
            this.ResumeLayout(false);

        }

    }
    //PrintTxt simple = new PrintTxt("D://Mainsoft//12.txt", "txt");
}

 

 

调用方式 PrintTxt simple = new PrintTxt("D://Mainsoft//12.txt", "txt");

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