打印DataGridView类

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

/// <summary>
/// <para>打印DataGridView</para>
/// <para>用法：</para>/// <para>　　　
/// DataGridViewPrint dgvPrint = new DataGridViewPrint(new DataGridView[] { DataGridView1,DataGridView2 });</para>
/// <para>　　　dgvPrint.Print();</para>
/// </summary>
public class DataGridViewPrint
{   
    private DataGridView[] dataGridView;   
    private PrintDocument printDocument;   
    private PageSetupDialog pageSetupDialog;   
    private PrintPreviewDialog printPreviewDialog;   
    private int dgvIndex = 0;   
    private int rowCount = 0;   
    private int colCount = 0;   
    private int x = 0;   
    private int y = 0;   
    int i = 0;   
    private int rowGap = 60;   
    private int leftMargin = 50; 
    private Font font = new Font("Arial", 10);
    private Font headingFont = new Font("Arial", 11, FontStyle.Underline);  
    private Font captionFont = new Font("Arial", 10, FontStyle.Bold);
    private Brush brush = new SolidBrush(Color.Black);
    private string cellValue = string.Empty; 

    public DataGridViewPrint(DataGridView[] dataGridView)   
    {       
        this.dataGridView = dataGridView;  
        printDocument = new PrintDocument();       
        printDocument.PrintPage += new PrintPageEventHandler(this.printDocument_PrintPage);
    }  
   
    private void printDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)   
    {      
        for (; dgvIndex < dataGridView.Length; dgvIndex++)     
        {      
            rowCount = dataGridView[dgvIndex].Rows.Count - 1;  
            colCount = dataGridView[dgvIndex].ColumnCount;      
            //print headings          
            y += rowGap;       
            x = leftMargin;        
            for (int j = 0; j < colCount; j++)    
            {          
                if (dataGridView[dgvIndex].Columns[j].Width > 0)       
                {             
                    cellValue = dataGridView[dgvIndex].Columns[j].HeaderText;       
                    e.Graphics.FillRectangle(new SolidBrush(Color.LightGray), x, y, dataGridView[dgvIndex].Columns[j].Width, rowGap);  
                    e.Graphics.DrawRectangle(Pens.Black, x, y, dataGridView[dgvIndex].Columns[j].Width, rowGap);            
                    e.Graphics.DrawString(cellValue, headingFont, brush, x, y);         
                    x += dataGridView[dgvIndex].Columns[j].Width;         
                }       
            }        
            //print all rows       
            for (; i < rowCount; i++)     
            {           
                y += rowGap;   
                x = leftMargin;    
                for (int j = 0; j < colCount; j++)   
                {              
                    if (dataGridView[dgvIndex].Columns[j].Width > 0)    
                    {                
                        cellValue = dataGridView[dgvIndex].Rows[i].Cells[j].Value.ToString();  
                        e.Graphics.DrawRectangle(Pens.Black, x, y, dataGridView[dgvIndex].Columns[j].Width, rowGap);      
                        e.Graphics.DrawString(cellValue, font, brush, x, y);           
                        x += dataGridView[dgvIndex].Columns[j].Width;            
                    }    
                }             
               
                if (y >= e.PageBounds.Height - 80)   
                {                
                    // 允許多頁打印             
                    y = 0;             
                    e.HasMorePages = true;     
                    i++;        
                    return;     
                }        
            }       
            y += rowGap;   
            for (int j = 0; j < colCount; j++)     
            {            
                e.Graphics.DrawString(" ", font, brush, x, y); 
            }       
            i = 0;  
        }      
        e.HasMorePages = false;  
    }  
   
    public PrintDocument GetPrintDocument()
    {     
        return printDocument;
    }  
   
    public void Print()
    {     
        try    
        {      
            pageSetupDialog = new PageSetupDialog(); 
            pageSetupDialog.Document = printDocument;       
            pageSetupDialog.ShowDialog();        
            printPreviewDialog = new PrintPreviewDialog();
            printPreviewDialog.Document = printDocument;      
            printPreviewDialog.Height = 600;      
            printPreviewDialog.Width = 800;   
            printPreviewDialog.ShowDialog();     
        }     
        catch (Exception e)   
        {          
            throw new Exception("Printer error." + e.Message); 
        }
    }
}