how can i print the data in DataGrid?

http://forums.aspfree.com/archive/t-17107
http://forums.aspfree.com/t17107/s.html
using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Printing;
using System.Data;

using System.Windows.Forms;

namespace Hooooo.Print
{
      public class DataGridPrinter
{
private DataGrid dataGrid;
private PrintDocument printDocument;
private PageSetupDialog pageSetupDialog;
private PrintPreviewDialog printPreviewDialog;

public DataGridPrinter(DataGrid dataGrid)
{ 
     this.dataGrid = dataGrid; 
     printDocument = new PrintDocument();
     printDocument.PrintPage += new PrintPageEventHandler(this.printDocument_PrintPage);
}

private void printDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
   int rowCount = 0;
   int colCount = 0;
   int x = 0;
   int y = 0;
   int rowGap = 20;
   int colGap = 5;
   int leftMargin = 50;
   Font font = new Font("Arial", 10);
   Font headingFont = new Font("Arial", 11, FontStyle.Underline);
   Font captionFont = new Font("Arial", 10, FontStyle.Bold); 
   Brush brush = new SolidBrush(Color.Black);
   string cellValue = "";

   if(dataGrid.DataSource.GetType().ToString() == "System.Data.DataTable")
   {
      rowCount = ((DataTable)dataGrid.DataSource).Rows.Count;
   }
   else if(dataGrid.DataSource.GetType().ToString() == "System.Collections.ArrayList")
   {
      rowCount = ((ArrayList)dataGrid.DataSource).Count;
   }
   colCount = dataGrid.TableStyles[0].GridColumnStyles.Count;

   //print caption
   if(dataGrid.CaptionVisible)
   {
      y += rowGap;
      x = leftMargin;
      e.Graphics.DrawString(dataGrid.CaptionText, captionFont, brush, x, y);
   }

   //print headings 
   y += rowGap;
   x = leftMargin;
   for(int j = 0; j < colCount; j++)
   {
      if(dataGrid.TableStyles[0].GridColumnStyles[j].Width > 0)
      {
         cellValue = dataGrid.TableStyles[0].GridColumnStyles[j].HeaderText; 
         e.Graphics.DrawString(cellValue, headingFont, brush, x, y);
         x += dataGrid.TableStyles[0].GridColumnStyles[j].Width + colGap; 
      }
   } 

   //print all rows
   for(int i = 0; i < rowCount; i++)
   {
      y += rowGap;
      x = leftMargin;
      for(int j = 0; j < colCount; j++)
      {
         if(dataGrid.TableStyles[0].GridColumnStyles[j].Width > 0)
         {
            cellValue = dataGrid[i,j].ToString(); 
            e.Graphics.DrawString(cellValue, font, brush, x, y);
            x += dataGrid.TableStyles[0].GridColumnStyles[j].Width + colGap;
            y = y + rowGap * (cellValue.Split(new char[] {'\r', '\n'}).Length - 1); 
         }
      } 
   }
   string s = cellValue;
   string f3 = cellValue;
 }

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);
   }
}
}
}