1 using System;   2 using System.Data;   3 using System.Drawing;   4 using System.Drawing.Printing;   5 using System.Windows.Forms;   6   7   8 namespace InvoiceSystem{
      9  10     public partial class Printer : Form  11     {
     12         private DataGridView invoiceGrid;  13         private int rowCount = 0;        //datagridview行数  14         private int colCount = 0;        //datagridview列数  15         private int x = 0;               //一个datagridview单元格宽度  16         private int y = 0;               //当前行行间距  17         int i = 0;                       //判断行数for循环的起始值  18         private int rowGap = 60;         //行间距  19         private int leftMargin = 50;     //正文到左面的左边距  20         private Font font = new Font("Arial", 10);     //正文字体  21         private Font headingFont = new Font("Arial", 11, FontStyle.Underline);   //标题字体  22         private Font captionFont = new Font("Arial", 10, FontStyle.Bold);  23         private Brush brush = new SolidBrush(Color.Black);  24         private string cellValue = string.Empty;           //保存datagridview一个单元格里的内容  25          26  27         public Printer(DataGridView invoiceGrid)  28         {
     29             InitializeComponent();  30             this.invoiceGrid = invoiceGrid;             //从外部传入一个datagridview引用  31  32         }  33  34  35         /// 
  36         /// 打印按钮  37         /// 
  38         ///   39         ///   40         private void button1_Click(object sender, EventArgs e)  41         {
     42  43             printDocument1.DocumentName = "发票列表";           //打印的文档文件名  44             PaperSize ps=new PaperSize("16开",724,1024);        //自定义纸张大小  45             //ps.RawKind = 9;                                   //设置为A4  46             printDocument1.DefaultPageSettings.PaperSize = ps;  47             printDocument1.DefaultPageSettings.Landscape = true;  //使用横向打印  48  49             printDocument1.PrintPage += new PrintPageEventHandler(printDocument1_PrintPage);  //设置函数printDocument1_PrintPage为打印事件处理函数  50             printDialog1.Document = printDocument1;  51             printPreviewDialog1.Document = printDocument1;  52  53             if (printDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK && printPreviewDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)  54             {
     55  56                 printDocument1.Print();  57  58  59             }  60         }  61  62  63         private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)  64         {
     65  66             rowCount = invoiceGrid.Rows.Count - 1;  67             colCount = invoiceGrid.ColumnCount;  68  69             //打印标题  70             y += rowGap;        71             x = leftMargin;  72             for (int j = 0; j < colCount; j++)  73             {
     74                 if (invoiceGrid.Columns[j].Width>0)  75                 {
     76                     cellValue = invoiceGrid.Columns[j].HeaderText;  77                     e.Graphics.FillRectangle(new SolidBrush(Color.LightGray), x, y, invoiceGrid.Columns[j].Width, rowGap); //将单元格的背景设置为灰色  78                     e.Graphics.DrawRectangle(Pens.Black, x, y, invoiceGrid.Columns[j].Width, rowGap);  //画出一个单元格  79                     e.Graphics.DrawString(cellValue, headingFont, brush, x, y);                 //将datagridview标题里的单元格里的内容填入刚才画出的单元格  80                     x += invoiceGrid.Columns[j].Width;         //宽度向后移一个datagridview单元格宽度的单位  81                 }  82             }  83  84             //打印所有行  85             for (; i < rowCount; i++)  86             {
     87                 y += rowGap;  88                 x = leftMargin;  89  90                 for (int j = 0; j < colCount; j++)  91                 {
     92                     if (invoiceGrid.Columns[j].Width>0)  93                     {
     94                         cellValue = invoiceGrid.Rows[i].Cells[j].Value.ToString();  95                         e.Graphics.DrawRectangle(Pens.Black, x, y, invoiceGrid.Columns[j].Width, rowGap);  96                         e.Graphics.DrawString(cellValue, font, brush, x, y);  97                         x += invoiceGrid.Columns[j].Width;  98                     }  99                 } 100 101                 if (y > e.PageBounds.Height)  //e.PageBounds.Height表示页边距的高度 102                 {
    103                     //允许多页打印 104                     y = 0; 105                     e.HasMorePages = true;    //如果还有没有打印的就再执行一次print()函数把余下的打印出来 106                     i++; 107                     return; 108                     109                 } 110 111             } 112             y += rowGap; 113 114 115             //底部填充空格 116             for (int j = 0; j < colCount; j++) 117             { 118                 e.Graphics.DrawString(" ", font, brush, x, y); 119             } 120             i = 0; 121             e.HasMorePages = false; 122         } 123     } 124 }

　　效果就是贴出的图片的样子