winform打印和预览

　　在windows应用程序中文档的打印是一项非常重要的功能，在以前一直是一个非常复杂的工作,Microsoft .Net Framework的打印功能都以组件的方式提供，为程序员提供了很大的方便。由于工作中常用到印功功能，个人写了一个专门打印DataGridView对象一个类，可以实现预览和打印功能，而且自动缩放字段、添加颜色；在预览时可以根据不同的比例查看效果，可以查看第几页数据和直接打印第几页的 数据。请看效果图。

二、附上调用代码

三、提供源码：

  1 using System;  2 using System.Collections.Generic;  3 using System.Linq;  4 using System.Text;  5 using System.Drawing.PRinting;  6 using System.Windows.Forms;  7 using System.Drawing;  8 using Dys.Component;  9 namespace Bll 10 { 11     /// <summary> 12     /// 打印 13     /// 开心懒人 14     /// 2014-10-10 15     /// </summary> 16     public class PrintDataGridView 17     { 18  19         static DataGridView dgv; 20         static string titleName = ""; //标题名称        21         static string titleName2 = ""; //第二标题名称      22         static int rowIndex = 0;   //当前行        23         static int page = 1; //当前页       24         static int rowsPerPage = 0;  //每页显示多少行 25         /// <summary> 26         /// 打印DataGridView 27         /// </summary> 28         /// <param name="dataGridView">要打印的DataGridView</param> 29         /// <param name="title">标题</param> 30         /// <param name="title2">第二标题,可以为null</param> 31         public static void Print(DataGridView dataGridView, string title, string title2) 32         { 33             try 34             { 35                 if (dataGridView == null) { return; } 36                 titleName = title; 37                 titleName2 = title2; 38                 dgv = dataGridView; 39                 PrintPreviewDialog ppvw = new PrintPreviewDialog(); 40                 ppvw.PrintPreviewControl.Zoom = 1.0; //显示比例为100% 41                 PrintDocument printDoc = new PrintDocument(); 42                 PrintDialog MyDlg = new PrintDialog(); 43                 MyDlg.Document = printDoc; 44                 printDoc.DefaultPageSettings.PaperSize = new PaperSize("A4", 850, 1000); 45                 printDoc.DefaultPageSettings.Margins = new Margins(60, 60, 60, 60); //设置边距              46                 ppvw.Document = printDoc;   //设置要打印的文档                47                 ((Form)ppvw).WindowState = FormWindowState.Maximized; //最大化                48                 rowIndex = 0; //当前行               49                 page = 1;  //当前页                              50                 printDoc.PrintPage += new PrintPageEventHandler(printDoc_PrintPage); //打印事件  51                 printDoc.EndPrint += new PrintEventHandler(printDoc_EndPrint); 52                 ppvw.Document.DefaultPageSettings.Landscape = true;    // 设置打印为横向                53                 ppvw.ShowDialog(); //打开预览 54  55             } 56             catch (Exception ex) 57             { 58                 MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error); 59             } 60  61         } 62  63         static void printDoc_EndPrint(object sender, PrintEventArgs e) 64         { 65             rowIndex = 0; //当前行           66             page = 1;  //当前页             67             rowsPerPage = 0;//每页显示多少行 68         } 69         private static void printDoc_PrintPage(object sender, PrintPageEventArgs e) 70         { 71  72             //标题字体 73             Font titleFont = new Font("微软雅黑", 16, FontStyle.Bold); 74             //标题尺寸 75             SizeF titleSize = e.Graphics.MeasureString(titleName, titleFont, e.MarginBounds.Width); 76             //x坐标 77             int x = e.MarginBounds.Left; 78             //y坐标 79             int y = Convert.ToInt32(e.MarginBounds.Top - titleSize.Height); 80             //边距以内纸张宽度 81             int pagerWidth = e.MarginBounds.Width; 82             //画标题 83             e.Graphics.DrawString(titleName, titleFont, Brushes.Black, x + (pagerWidth - titleSize.Width) / 2, y); 84             y += (int)titleSize.Height; 85             if (titleName2 != null && titleName2 != "") 86             { 87  88                 //画第二标题 89                 e.Graphics.DrawString(titleName2, dgv.Font, Brushes.Black, x + (pagerWidth - titleSize.Width) / 2 + 200, y); 90                 //第二标题尺寸 91                 SizeF titleSize2 = e.Graphics.MeasureString(titleName2, dgv.Font, e.MarginBounds.Width); 92                 y += (int)titleSize2.Height; 93  94             } 95  96             //表头高度 97             int headerHeight = 0; 98             //纵轴上 内容与线的距离 99             int padding = 6;100             //所有显示列的宽度101             int columnsWidth = 0;102             //计算所有显示列的宽度103             foreach (DataGridViewColumn column in dgv.Columns)104             {105 106                 //隐藏列返回107                 if (!column.Visible) continue;108                 //所有显示列的宽度109                 columnsWidth += column.Width;110             }111 112             //计算表头高度113             foreach (DataGridViewColumn column in dgv.Columns)114             {115 116                 //列宽117                 int columnWidth = (int)(Math.Floor((double)column.Width / (double)columnsWidth * (double)pagerWidth));118                 //表头高度119                 int temp = (int)e.Graphics.MeasureString(column.HeaderText, column.InheritedStyle.Font, columnWidth).Height + 2 * padding;120                 if (temp > headerHeight) headerHeight = temp;121             }122 123             //画表头124 125             foreach (DataGridViewColumn column in dgv.Columns)126             {127 128                 //隐藏列返回129                 if (!column.Visible) continue;130                 //列宽131                 int columnWidth = (int)(Math.Floor((double)column.Width / (double)columnsWidth * (double)pagerWidth));132                 //内容居中要加的宽度133                 float cenderWidth = (columnWidth - e.Graphics.MeasureString(column.HeaderText, column.InheritedStyle.Font, columnWidth).Width) / 2;134                 if (cenderWidth < 0) cenderWidth = 0;135                 //内容居中要加的高度136                 float cenderHeight = (headerHeight + padding - e.Graphics.MeasureString(column.HeaderText, column.InheritedStyle.Font, columnWidth).Height) / 2;137                 if (cenderHeight < 0) cenderHeight = 0;138                 //画背景139                 e.Graphics.FillRectangle(new SolidBrush(Color.LightGray), new Rectangle(x, y, columnWidth, headerHeight));140                 //画边框141                 e.Graphics.DrawRectangle(Pens.Black, new Rectangle(x, y, columnWidth, headerHeight));142                 ////画上边线143 144                 //e.Graphics.DrawLine(Pens.Black, x, y, x + columnWidth, y);145 146                 ////画下边线147 148                 //e.Graphics.DrawLine(Pens.Black, x, y + headerHeight, x + columnWidth, y + headerHeight);149 150                 ////画右边线151 152                 //e.Graphics.DrawLine(Pens.Black, x + columnWidth, y, x + columnWidth, y + headerHeight);153 154                 //if (x == e.MarginBounds.Left)155 156                 //{157 158                 //    //画左边线159 160                 //    e.Graphics.DrawLine(Pens.Black, x, y, x, y + headerHeight);161 162                 //}163 164                 //画内容165                 e.Graphics.DrawString(column.HeaderText, column.InheritedStyle.Font, new SolidBrush(column.InheritedStyle.ForeColor), new RectangleF(x + cenderWidth, y + cenderHeight, columnWidth, headerHeight));166                 x += columnWidth;167 168             }169 170             x = e.MarginBounds.Left;171             y += headerHeight;172             while (rowIndex < dgv.Rows.Count)173