1.先創建一個類文件PrintDataGridView代碼如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Data;
using System.Data.SqlClient;
using System.Drawing.Printing;
using System.Windows.Forms;
namespace MyText
{
class PrintDataGridView
{
private static List<DataGridViewCellPrint> CellPrintList = new List<DataGridViewCellPrint>();
private static PageSetupDialog pageSetup =null;
private static int printRowCount = 0;
private static bool IsPrint = true;
private static bool IsRole = true;
private static int PoXTmp = 0;
private static int PoYTmp = 0;
private static int WidthTmp = 0;
private static int HeightTmp = 0;
private static int RowIndex = 0;
/// <summary>
/// 打印DataGridView控件
/// </summary>
/// <param name="dataGridView">DataGridView控件</param>
/// <param name="includeColumnText">是否包括列標題</param>
/// <param name="e">爲 System.Drawing.Printing.PrintDocument.PrintPage 事件提供數據。</param>
/// <param name="PoX">起始X座標</param>
/// <param name="PoY">起始Y座標</param>
public static void Print(DataGridView dataGridView, bool includeColumnText, PrintPageEventArgs eValue, ref int PoX, ref int PoY)
{
pageSetup = new PageSetupDialog();
pageSetup.PageSettings = eValue.PageSettings;
//pageSetup.Document;
pageSetup.ShowDialog();
try
{
if (PrintDataGridView.IsPrint)
{
PrintDataGridView.printRowCount = 0;
PrintDataGridView.IsPrint = false;
PrintDataGridView.DataGridViewCellVsList(dataGridView, includeColumnText);
if (PrintDataGridView.CellPrintList.Count==0)
return;
if (PoX > eValue.MarginBounds.Left)
PrintDataGridView.IsRole = true;
else
PrintDataGridView.IsRole = false;
PrintDataGridView.PoXTmp = PoX;
PrintDataGridView.PoYTmp = PoY;
PrintDataGridView.RowIndex = 0;
WidthTmp = 0;
HeightTmp = 0;
}
if (PrintDataGridView.printRowCount!=0)
{
if (IsRole)
{
PoX = PoXTmp = eValue.MarginBounds.Left;
PoY = PoYTmp = eValue.MarginBounds.Top;
}
else
{
PoX = PoXTmp;
PoY = PoYTmp;
}
}
while (PrintDataGridView.printRowCount < PrintDataGridView.CellPrintList.Count)
{
DataGridViewCellPrint CellPrint = CellPrintList[PrintDataGridView.printRowCount];
if (RowIndex == CellPrint.RowIndex)
PoX = PoX + WidthTmp;
else
{
PoX = PoXTmp;
PoY = PoY + HeightTmp;
if (PoY + HeightTmp > eValue.MarginBounds.Bottom)
{
HeightTmp = 0;
eValue.HasMorePages = true;
return;
}
}
using (SolidBrush solidBrush = new SolidBrush(CellPrint.BackColor))
{
RectangleF rectF1 = new RectangleF(PoX, PoY, CellPrint.Width, CellPrint.Height);
eValue.Graphics.FillRectangle(solidBrush, rectF1);
using (Pen pen = new Pen(Color.Black, 1))
eValue.Graphics.DrawRectangle(pen, Rectangle.Round(rectF1));
solidBrush.Color = CellPrint.ForeColor;
eValue.Graphics.DrawString(CellPrint.FormattedValue, CellPrint.Font, solidBrush, new Point(PoX + 2, PoY + 3));
}
WidthTmp = CellPrint.Width;
HeightTmp = CellPrint.Height;
RowIndex = CellPrint.RowIndex;
PrintDataGridView.printRowCount++;
}
PoY = PoY + HeightTmp;
eValue.HasMorePages = false;
PrintDataGridView.IsPrint = true;
}
catch(Exception ex)
{
eValue.HasMorePages = false;
PrintDataGridView.IsPrint = true;
throw ex;
}
}
/// <summary>
/// 將DataGridView控件內容轉變到 CellPrintList
/// </summary>
/// <param name="dataGridView">DataGridView控件</param>
/// <param name="includeColumnText">是否包括列標題</param>
private static void DataGridViewCellVsList(DataGridView dataGridView, bool includeColumnText)
{
CellPrintList.Clear();
try
{
int rowsCount = dataGridView.Rows.Count;
int colsCount = dataGridView.Columns.Count;
//最後一行是供輸入的行時，不用讀數據。
if (dataGridView.Rows[rowsCount - 1].IsNewRow)
rowsCount--;
//包括列標題
if (includeColumnText)
{
for (int columnsIndex = 0; columnsIndex < colsCount; columnsIndex++)
{
if (dataGridView.Columns[columnsIndex].Visible)
{
DataGridViewCellPrint CellPrint = new DataGridViewCellPrint();
CellPrint.FormattedValue = dataGridView.Columns[columnsIndex].HeaderText;
CellPrint.RowIndex = 0;
CellPrint.ColumnIndex = columnsIndex;
CellPrint.Font = dataGridView.Columns[columnsIndex].HeaderCell.Style.Font;
CellPrint.BackColor = Color.Orange;// dataGridView.ColumnHeadersDefaultCellStyle.BackColor;
CellPrint.ForeColor = dataGridView.ColumnHeadersDefaultCellStyle.ForeColor;
CellPrint.Width = dataGridView.Columns[columnsIndex].Width;
CellPrint.Height = dataGridView.ColumnHeadersHeight;
CellPrintList.Add(CellPrint);
}
}
}
//讀取單元格數據
for (int rowIndex = 0; rowIndex < rowsCount; rowIndex++)
{
for (int columnsIndex = 0; columnsIndex < colsCount; columnsIndex++)
{
if (dataGridView.Columns[columnsIndex].Visible)
{
DataGridViewCellPrint CellPrint = new DataGridViewCellPrint();
CellPrint.FormattedValue = dataGridView.Rows[rowIndex].Cells[columnsIndex].FormattedValue.ToString();
if (includeColumnText)
CellPrint.RowIndex = rowIndex + 1;//假如包括列標題則從行號1開始
else
CellPrint.RowIndex = rowIndex;
CellPrint.ColumnIndex = columnsIndex;
CellPrint.Font = dataGridView.Rows[rowIndex].Cells[columnsIndex].Style.Font;
System.Drawing.Color TmpColor = System.Drawing.Color.Empty;
if (System.Drawing.Color.Empty != dataGridView.Rows[rowIndex].Cells[columnsIndex].Style.BackColor)
TmpColor = dataGridView.Rows[rowIndex].Cells[columnsIndex].Style.BackColor;
else if (System.Drawing.Color.Empty != dataGridView.Rows[rowIndex].DefaultCellStyle.BackColor)
TmpColor = dataGridView.Rows[rowIndex].DefaultCellStyle.BackColor;
else
TmpColor = dataGridView.DefaultCellStyle.BackColor;
CellPrint.BackColor = TmpColor;
TmpColor = System.Drawing.Color.Empty;
if (System.Drawing.Color.Empty != dataGridView.Rows[rowIndex].Cells[columnsIndex].Style.ForeColor)
TmpColor = dataGridView.Rows[rowIndex].Cells[columnsIndex].Style.ForeColor;
else if (System.Drawing.Color.Empty != dataGridView.Rows[rowIndex].DefaultCellStyle.ForeColor)
TmpColor = dataGridView.Rows[rowIndex].DefaultCellStyle.ForeColor;
else
TmpColor = dataGridView.DefaultCellStyle.ForeColor;
CellPrint.ForeColor = TmpColor;
CellPrint.Width = dataGridView.Columns[columnsIndex].Width;
CellPrint.Height = dataGridView.Rows[rowIndex].Height;
CellPrintList.Add(CellPrint);
}
}
}
}
catch { throw; }
}
private class DataGridViewCellPrint
{
private string _FormattedValue = "";
private int _RowIndex = -1;
private int _ColumnIndex = -1;
private System.Drawing.Color _ForeColor = System.Drawing.Color.Black;
private System.Drawing.Color _BackColor = System.Drawing.Color.White;
private int _Width = 100;
private int _Height = 23;
private System.Drawing.Font _Font = new System.Drawing.Font("宋體", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
/// <summary>
/// 獲取或設置單元格的字體。
/// </summary>
public System.Drawing.Font Font
{
set { if (null != value) _Font = value; }
get { return _Font; }
}
/// <summary>
/// 獲取爲顯示進行格式化的單元格的值。
/// </summary>
public string FormattedValue
{
set { _FormattedValue = value; }
get { return _FormattedValue; }
}
/// <summary>
/// 獲取或設置列的當前寬度 （以像素爲單位）。默認值爲 100。
/// </summary>
public int Width
{
set { _Width = value; }
get { return _Width; }
}
/// <summary>
/// 獲取或設置列標題行的高度（以像素爲單位）。默認值爲 23。
/// </summary>
public int Height
{
set { _Height = value; }
get { return _Height; }
}
/// <summary>
/// 獲取或設置行號。
/// </summary>
public int RowIndex
{
set { _RowIndex = value; }
get { return _RowIndex; }
}
/// <summary>
/// 獲取或設置列號。
/// </summary>
public int ColumnIndex
{
set { _ColumnIndex = value; }
get { return _ColumnIndex; }
}
/// <summary>
/// 獲取或設置前景色。
/// </summary>
public System.Drawing.Color ForeColor
{
set { _ForeColor = value; }
get { return _ForeColor; }
}
/// <summary>
/// 獲取或設置背景色。
/// </summary>
public System.Drawing.Color BackColor
{
set { _BackColor = value; }
get { return _BackColor; }
}
}
}
}
2.在窗體中添加PrintDocument和PriintPreviewDialog控件，同時將PriintPreviewDialog屬性中的Document屬性設爲PrintDocument的名稱，否則不能實現打印。 
再在窗體中添加一個按鈕，實現打印預覽功能。
雙擊PrintDocument其中的代碼如下：
private void PrintDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
Font font = new Font("宋體", 12);
e.Graphics.DrawString("菜單信息", font, Brushes.Red, 400, 20);
e.Graphics.DrawString("時間" + DateTime.Now.ToLongDateString(), font, Brushes.Black, 20, 40);
int x = 10;
int y = 70;
PrintDataGridView.Print(dgvInfo2, true, e, ref x, ref y); //注意：PrintDataGridView該類位於上面所寫的業務邏輯層之中
}
打印預覽按鈕的單擊事件中的代碼如下：
private void btnPrint_Click(object sender, EventArgs e)
{
this.printPreviewDialog1.ShowDialog();
}
至此 運行程序點打印就可以出現打印預覽