C#中进行文本打印

问题描述：
      做了个记事本程序，要求能按标准打印其中的文档，包括在每行文字数目上进行控制等。
解决方法：
 一、搞清楚打印的过程：
      1、定义PrintDocument类，并且声明其PrintPage事件。
   

private void PrintDocument()
        {
            printDocument = new PrintDocument();
            printDocument.PrintPage += new PrintPageEventHandler(printDocument_PrintPage);
        }

     2、实现PrintPage事件（关键）：
    

    /**//// <summary>
        /// 用来处理打印过程的核心事件。
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        /// <remarks></remarks>
        void printDocument_PrintPage(object sender, PrintPageEventArgs e)
        {
            //StringReader lineReader = new StringReader(textBox.Text);
            Graphics graphic = e.Graphics;//获取绘图对象
            float linesPerPage = 0;//页面行号
            float yPosition = 0;//绘制字符串的纵向位置
            float leftMargin = e.MarginBounds.Left;//左边距
            float topMargin = e.MarginBounds.Top;//上边距
            string line = string.Empty;//读取的行字符串
            int currentPageLine=0;//当前页读取的行数
            Font charFont = richTextBox1.Font;//获取打印字体
            SolidBrush brush = new SolidBrush(Color.Black);//刷子
            linesPerPage = e.MarginBounds.Height / charFont.GetHeight(graphic);//每页可打印的行数
            //countNum记录全局行数，currentPageLine记录当前打印页行数。
            while (countNum < richTextBox1.Lines.Length)
                {
                    if (currentPageLine < linesPerPage)
                    {
                        line = richTextBox1.Lines[countNum].ToString();
                        if (line.Length <= 50)
                        {
                            yPosition = topMargin + (currentPageLine * charFont.GetHeight(graphic));
                            //绘制当前行
                            graphic.DrawString(line, charFont, brush, leftMargin, yPosition, new StringFormat());
                            countNum++;
                            currentPageLine++;
                        }
                        else
                        {
                            //拆分后的行数
                            int moreLine = line.Length / 50 + 1;
                            string tempLine;
                            for (int i = 0; i < moreLine; i++)
                            {
                                //获得当前行的子串
                                if ((line.Length - i * 50) >= 50)
                                {
                                     tempLine = line.Substring(i * 50, 50);
                                }
                                else
                                {
                                    tempLine = line.Substring(i * 50, line.Length - i * 50);
                                }
                                yPosition = topMargin + (currentPageLine * charFont.GetHeight(graphic));
                                //绘制当前行
                                graphic.DrawString(tempLine, charFont, brush, leftMargin, yPosition, new StringFormat());
                                //当前打印页行数加1
                                currentPageLine++;
                            }
                            //总行数加1
                            countNum++;
                        }
                    }
                    else
                    {
                        line = null;
                        break;
                    }
                }
            //一页显示不完时自动重新调用此方法
            if (line == null)
            {
                e.HasMorePages = true;
            }
            else
            {
                e.HasMorePages = false;
            }
            //每次打印完后countNum清0;
            if (countNum >= richTextBox1.Lines.Length)
            {
                countNum = 0;
            }
        }

     3、使用 printDocument.Print()进行打印

 private void 打印PToolStripButton_Click(object sender, EventArgs e)
        {
           // tsmSave_Click(sender, e);
            //初始化PrintDocument()
            this.PrintDocument();
            PrintDialog print = new PrintDialog();
            //将初始化后的printDocument赋给print.Document
            print.Document = printDocument;
            try
            {
                if (print.ShowDialog() == DialogResult.OK)
                {
                    //打印时直接调用PrintDocument的Print方法
                    printDocument.Print();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("打印出错:" + ex.ToString());
                //出错则结束打印过程
                printDocument.PrintController.OnEndPrint(printDocument, new PrintEventArgs());
            }
        }

    4、定义打印预览（可选）

  private void 打印预览VToolStripMenuItem_Click(object sender, EventArgs e)
        {
            PrintPreviewDialog printPreview = new PrintPreviewDialog();
            //初始化PrintDocument
            this.PrintDocument();
            //将初始化后的printDocument赋给print.Document
            printPreview.Document = printDocument;
            try
            {
                printPreview.ShowDialog();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

完整代码下载/Files/seek/NotePad.rar