[asp.net]c# winform打印类

using System;

  using System.Collections.Generic;

  using System.Text;

  using System.Windows.Forms;

  using System.Drawing.Printing;

  using System.Drawing;

 

  namespace Lds2013

  {

     /**//// <summary>

     /// 打印类

     /// </summary>

     public class Printer

     {

         private DataGridView dataview;

         private PrintDocument printDoc;

         //打印有效区域的宽度

         int width;

         int height;

         int columns;

         double Rate;

         bool hasMorePage = false;

         int currRow = 0;

         int rowHeight = 20;

         //打印页数

         int PageNumber;

         //当前打印页的行数

         int pageSize = 20;

         //当前打印的页码

         int PageIndex;

 

         private int PageWidth; //打印纸的宽度

         private int PageHeight; //打印纸的高度

         private int LeftMargin; //有效打印区距离打印纸的左边大小

         private int TopMargin;//有效打印区距离打印纸的上面大小

         private int RightMargin;//有效打印区距离打印纸的右边大小

         private int BottomMargin;//有效打印区距离打印纸的下边大小

         

         int rows;

        

         /**//// <summary>

         /// 构造函数

         /// </summary>

         /// <param name="dataview">要打印的DateGridView</param>

         /// <param name="printDoc">PrintDocument用于获取打印机的设置</param>

         public Printer(DataGridView dataview, PrintDocument printDoc)

         {

             this.dataview = dataview;

             this.printDoc = printDoc;

             PageIndex = 0;

             //获取打印数据的具体行数

             this.rows = dataview.RowCount;

 

             this.columns = dataview.ColumnCount;

             //判断打印设置是否是横向打印

             if (!printDoc.DefaultPageSettings.Landscape)

             {

 

                 PageWidth = printDoc.DefaultPageSettings.PaperSize.Width;

                 PageHeight = printDoc.DefaultPageSettings.PaperSize.Height;

 

             }

             else

             {

 

                 PageHeight = printDoc.DefaultPageSettings.PaperSize.Width;

                 PageWidth = printDoc.DefaultPageSettings.PaperSize.Height;

 

             }

             LeftMargin = printDoc.DefaultPageSettings.Margins.Left;

             TopMargin = printDoc.DefaultPageSettings.Margins.Top;

             RightMargin = printDoc.DefaultPageSettings.Margins.Right;

             BottomMargin = printDoc.DefaultPageSettings.Margins.Bottom;

 

 

             height = PageHeight - TopMargin - BottomMargin - 2;

             width = PageWidth - LeftMargin - RightMargin - 2;

 

             double tempheight = height;

             double temprowHeight = rowHeight;

             while (true)

             {

                 string temp = Convert.ToString(tempheight / Math.Round(temprowHeight, 3));

                 int i = temp.IndexOf('.');

                 double tt = 100;

                 if (i != -1)

                 {

                     tt = Math.Round(Convert.ToDouble(temp.Substring(temp.IndexOf('.'))), 3);

                 }

                 if (tt <= 0.01)

                 {

                     rowHeight = Convert.ToInt32(temprowHeight);

                     break;

                 }

                 else

                 {

                     temprowHeight = temprowHeight + 0.01;

 

                 }

            }

            pageSize = height / rowHeight;

            if ((rows + 1) <= pageSize)

            {

                pageSize = rows + 1;

                PageNumber = 1;

            }

            else

            {

                PageNumber = rows / (pageSize - 1);

                if (rows % (pageSize - 1) != 0)

                {

                    PageNumber = PageNumber + 1;

                }

 

            }

        }

 

        /**//// <summary>

        /// 初始化打印

        /// </summary>

        private void InitPrint()

        {

            PageIndex = PageIndex + 1;

            if (PageIndex == PageNumber)

            {

                hasMorePage = false;

                if (PageIndex != 1)

                {

                    pageSize = rows % (pageSize - 1) + 1;

                }

            }

            else

            {

                hasMorePage = true;

            }

 

 

 

        }

        //打印头

        private void DrawHeader(Graphics g)

        {

 

            Font font = new Font("宋体", 12, FontStyle.Bold);

            int temptop = (rowHeight / 2) + TopMargin + 1;

            int templeft = LeftMargin + 1;

 

            for (int i = 0; i < this.columns; i++)

            {

                string headString = this.dataview.Columns[i].HeaderText;

                float fontHeight = g.MeasureString(headString, font).Height;

                float fontwidth = g.MeasureString(headString, font).Width;

                float temp = temptop - (fontHeight) / 3;

                g.DrawString(headString, font, Brushes.Black, new PointF(templeft, temp));

                templeft = templeft + (int)(this.dataview.Columns[i].Width / Rate) + 1;

            }

 

        }

        //画表格

        private void DrawTable(Graphics g)

        {

 

            Rectangle border = new Rectangle(LeftMargin, TopMargin, width, (pageSize) * rowHeight);

            g.DrawRectangle(new Pen(Brushes.Black, 2), border);

            for (int i = 1; i < pageSize; i++)

            {

                if (i != 1)

                {

                    g.DrawLine(new Pen(Brushes.Black, 1), new Point(LeftMargin + 1, (rowHeight * i) + TopMargin + 1), new Point(width + LeftMargin, (rowHeight * i) + TopMargin + 1));

                }

                else

                {

                    g.DrawLine(new Pen(Brushes.Black, 2), new Point(LeftMargin + 1, (rowHeight * i) + TopMargin + 1), new Point(width + LeftMargin, (rowHeight * i) + TopMargin + 1));

                }

            }

 

            //计算出列的总宽度和打印纸比率

            Rate = Convert.ToDouble(GetDateViewWidth()) / Convert.ToDouble(width);

            int tempLeft = LeftMargin + 1;

            int endY = (pageSize) * rowHeight + TopMargin;

            for (int i = 1; i < columns; i++)

            {

                tempLeft = tempLeft + 1 + (int)(this.dataview.Columns[i - 1].Width / Rate);

                g.DrawLine(new Pen(Brushes.Black, 1), new Point(tempLeft, TopMargin), new Point(tempLeft, endY));

            }

 

        }

         /**//// <summary>

         /// 获取打印的列的总宽度

         /// </summary>

         /// <returns></returns>

        private int GetDateViewWidth()

        {

            int total = 0;

            for (int i = 0; i < this.columns; i++)

            {

                total = total + this.dataview.Columns[i].Width;

            }

            return total;

        }

 

        //打印行数据

        private void DrawRows(Graphics g)

        {

 

            Font font = new Font("宋体", 12, FontStyle.Regular);

            int temptop = (rowHeight / 2) + TopMargin + 1 + rowHeight;

 

 

            for (int i = currRow; i < pageSize + currRow - 1; i++)

            {

                int templeft = LeftMargin + 1;

                for (int j = 0; j < columns; j++)

                {

                    string headString = this.dataview.Rows[i].Cells[j].Value.ToString();

                    float fontHeight = g.MeasureString(headString, font).Height;

                    float fontwidth = g.MeasureString(headString, font).Width;

                    float temp = temptop - (fontHeight) / 3;

                    while (true)

                    {

                        if (fontwidth <= (int)(this.dataview.Columns[j].Width / Rate))

                        {

                            break;

                        }

                        else

                        {

                            headString = headString.Substring(0, headString.Length - 1);

                            fontwidth = g.MeasureString(headString, font).Width;

                        }

                    }

                    g.DrawString(headString, font, Brushes.Black, new PointF(templeft, temp));

 

                    templeft = templeft + (int)(this.dataview.Columns[j].Width / Rate) + 1;

                }

 

                temptop = temptop + rowHeight;

            }

            currRow = pageSize + currRow - 1;

        }

 

        /**//// <summary>

        /// 在PrintDocument中的PrintPage方法中调用

        /// </summary>

        /// <param name="g">传入PrintPage中PrintPageEventArgs中的Graphics</param>

        /// <returns>是否还有打印页 有返回true，无则返回false</returns>

        public bool Print(Graphics g)

        {

            InitPrint();

            DrawTable(g);

            DrawHeader(g);

            DrawRows(g);

 

            //打印页码

            string pagestr = PageIndex + " / " + PageNumber;

            Font font = new Font("宋体", 12, FontStyle.Regular);

            g.DrawString(pagestr, font, Brushes.Black, new PointF((PageWidth / 2) - g.MeasureString(pagestr, font).Width, PageHeight - (BottomMargin / 2) - g.MeasureString(pagestr, font).Height));

            //打印查询的功能项名称

            string temp = dataview.Tag.ToString() + " " + DateTime.Now.ToString("yyyy-MM-dd HH:mm");

            g.DrawString(temp, font, Brushes.Black, new PointF(PageWidth - 5 - g.MeasureString(temp, font).Width, PageHeight - 5 - g.MeasureString(temp, font).Height));

            return hasMorePage;

        }

    }

}