很多人都在論壇里問，如何實現DataGrid的打印預覽和打印，現在我就把這方面的源代碼告訴大家。這段代碼也花費了我1個晚上的時間，呵呵！數據庫是基于SQL Server2000自帶的northwind。源代碼如下：

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.OleDb;

namespace DataGridPrint
{
 /// <summary>
 /// Summary description for Form1.
 /// </summary>
 public class Form1 : System.Windows.Forms.Form
 {
  private System.Windows.Forms.Panel panel1;
  private System.Windows.Forms.DataGrid dgTest;
  private System.Windows.Forms.Button btnFillDataGrid;
  private System.Windows.Forms.MainMenu mnuFile;
  private System.Windows.Forms.MenuItem menuItem1;
  private System.Windows.Forms.MenuItem miPrintPreview;
  private System.Windows.Forms.MenuItem miPrint;
  private System.Windows.Forms.MenuItem menuItem4;
  private System.Windows.Forms.MenuItem miExit;
  private System.Windows.Forms.DataGridTableStyle dgtsCustomers;
  private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn1;
  private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn2;
  private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn3;
  private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn4;
  private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn6;
  private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn7;
  private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn8;
  private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn9;
  private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn10;
  private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn11;
  private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn5;
  private System.Data.SqlClient.SqlDataAdapter sqlDataAdapter1;
  private System.Data.SqlClient.SqlCommand sqlSelectCommand1;
  private System.Data.SqlClient.SqlCommand sqlInsertCommand1;
  private System.Data.SqlClient.SqlCommand sqlUpdateCommand1;
  private System.Data.SqlClient.SqlCommand sqlDeleteCommand1;
  private System.Data.SqlClient.SqlConnection sqlConnection1;
  /// <summary>
  /// Required designer variable.
  /// </summary>
  private System.ComponentModel.Container components = null;

  public Form1()
  {
   //
   // Required for Windows Form Designer support
   //
   InitializeComponent();

   //
   // TODO: Add any constructor code after InitializeComponent call
   //
  }

  /// <summary>
  /// Clean up any resources being used.
  /// </summary>
  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if (components != null) 
    {
     components.Dispose();
    }
   }
   base.Dispose( disposing );
  }

  #region Windows Form Designer generated code
  /// <summary>
  /// Required method for Designer support - do not modify
  /// the contents of this method with the code editor.
  /// </summary>
  private void InitializeComponent()
  {
   this.panel1 = new System.Windows.Forms.Panel();
   this.dgTest = new System.Windows.Forms.DataGrid();
   this.dgtsCustomers = new System.Windows.Forms.DataGridTableStyle();
   this.dataGridTextBoxColumn1 = new System.Windows.Forms.DataGridTextBoxColumn();
   this.dataGridTextBoxColumn2 = new System.Windows.Forms.DataGridTextBoxColumn();
   this.dataGridTextBoxColumn3 = new System.Windows.Forms.DataGridTextBoxColumn();
   this.dataGridTextBoxColumn4 = new System.Windows.Forms.DataGridTextBoxColumn();
   this.dataGridTextBoxColumn5 = new System.Windows.Forms.DataGridTextBoxColumn();
   this.dataGridTextBoxColumn6 = new System.Windows.Forms.DataGridTextBoxColumn();
   this.dataGridTextBoxColumn7 = new System.Windows.Forms.DataGridTextBoxColumn();
   this.dataGridTextBoxColumn8 = new System.Windows.Forms.DataGridTextBoxColumn();
   this.dataGridTextBoxColumn9 = new System.Windows.Forms.DataGridTextBoxColumn();
   this.dataGridTextBoxColumn10 = new System.Windows.Forms.DataGridTextBoxColumn();
   this.dataGridTextBoxColumn11 = new System.Windows.Forms.DataGridTextBoxColumn();
   this.btnFillDataGrid = new System.Windows.Forms.Button();
   this.mnuFile = new System.Windows.Forms.MainMenu();
   this.menuItem1 = new System.Windows.Forms.MenuItem();
   this.miPrintPreview = new System.Windows.Forms.MenuItem();
   this.miPrint = new System.Windows.Forms.MenuItem();
   this.menuItem4 = new System.Windows.Forms.MenuItem();
   this.miExit = new System.Windows.Forms.MenuItem();
   this.sqlDataAdapter1 = new System.Data.SqlClient.SqlDataAdapter();
   this.sqlSelectCommand1 = new System.Data.SqlClient.SqlCommand();
   this.sqlInsertCommand1 = new System.Data.SqlClient.SqlCommand();
   this.sqlUpdateCommand1 = new System.Data.SqlClient.SqlCommand();
   this.sqlDeleteCommand1 = new System.Data.SqlClient.SqlCommand();
   this.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
   this.panel1.SuspendLayout();
   ((System.ComponentModel.ISupportInitialize)(this.dgTest)).BeginInit();
   this.SuspendLayout();
   // 
   // panel1
   // 
   this.panel1.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
    | System.Windows.Forms.AnchorStyles.Left) 
    | System.Windows.Forms.AnchorStyles.Right);
   this.panel1.Controls.AddRange(new System.Windows.Forms.Control[] {
                     this.dgTest});
   this.panel1.Location = new System.Drawing.Point(0, 9);
   this.panel1.Name = "panel1";
   this.panel1.Size = new System.Drawing.Size(788, 398);
   this.panel1.TabIndex = 1;
   // 
   // dgTest
   // 
   this.dgTest.DataMember = "";
   this.dgTest.Dock = System.Windows.Forms.DockStyle.Fill;
   this.dgTest.HeaderForeColor = System.Drawing.SystemColors.ControlText;
   this.dgTest.Name = "dgTest";
   this.dgTest.Size = new System.Drawing.Size(788, 398);
   this.dgTest.TabIndex = 0;
   this.dgTest.TableStyles.AddRange(new System.Windows.Forms.DataGridTableStyle[] {
                          this.dgtsCustomers});
   // 
   // dgtsCustomers
   // 
   this.dgtsCustomers.DataGrid = this.dgTest;
   this.dgtsCustomers.GridColumnStyles.AddRange(new System.Windows.Forms.DataGridColumnStyle[] {
                           this.dataGridTextBoxColumn1,
                           this.dataGridTextBoxColumn2,
                           this.dataGridTextBoxColumn3,
                           this.dataGridTextBoxColumn4,
                           this.dataGridTextBoxColumn5,
                           this.dataGridTextBoxColumn6,
                           this.dataGridTextBoxColumn7,
                           this.dataGridTextBoxColumn8,
                           this.dataGridTextBoxColumn9,
                           this.dataGridTextBoxColumn10,
                           this.dataGridTextBoxColumn11});
   this.dgtsCustomers.HeaderForeColor = System.Drawing.SystemColors.ControlText;
   this.dgtsCustomers.MappingName = "Customers";
   this.dgtsCustomers.ReadOnly = true;
   // 
   // dataGridTextBoxColumn1
   // 
   this.dataGridTextBoxColumn1.Format = "";
   this.dataGridTextBoxColumn1.FormatInfo = null;
   this.dataGridTextBoxColumn1.HeaderText = "Customer Id";
   this.dataGridTextBoxColumn1.MappingName = "CustomerId";
   this.dataGridTextBoxColumn1.NullText = "";
   this.dataGridTextBoxColumn1.Width = 75;
   // 
   // dataGridTextBoxColumn2
   // 
   this.dataGridTextBoxColumn2.Format = "";
   this.dataGridTextBoxColumn2.FormatInfo = null;
   this.dataGridTextBoxColumn2.HeaderText = "Company Name";
   this.dataGridTextBoxColumn2.MappingName = "CompanyName";
   this.dataGridTextBoxColumn2.NullText = "";
   this.dataGridTextBoxColumn2.Width = 200;
   // 
   // dataGridTextBoxColumn3
   // 
   this.dataGridTextBoxColumn3.Format = "";
   this.dataGridTextBoxColumn3.FormatInfo = null;
   this.dataGridTextBoxColumn3.HeaderText = "Contact Name";
   this.dataGridTextBoxColumn3.MappingName = "ContactName";
   this.dataGridTextBoxColumn3.NullText = "";
   this.dataGridTextBoxColumn3.Width = 125;
   // 
   // dataGridTextBoxColumn4
   // 
   this.dataGridTextBoxColumn4.Format = "";
   this.dataGridTextBoxColumn4.FormatInfo = null;
   this.dataGridTextBoxColumn4.HeaderText = "Contact Title";
   this.dataGridTextBoxColumn4.MappingName = "ContactTitle";
   this.dataGridTextBoxColumn4.NullText = "";
   this.dataGridTextBoxColumn4.Width = 170;
   // 
   // dataGridTextBoxColumn5
   // 
   this.dataGridTextBoxColumn5.Format = "";
   this.dataGridTextBoxColumn5.FormatInfo = null;
   this.dataGridTextBoxColumn5.HeaderText = "Address";
   this.dataGridTextBoxColumn5.MappingName = "Address";
   this.dataGridTextBoxColumn5.NullText = "";
   this.dataGridTextBoxColumn5.Width = 250;
   // 
   // dataGridTextBoxColumn6
   // 
   this.dataGridTextBoxColumn6.Format = "";
   this.dataGridTextBoxColumn6.FormatInfo = null;
   this.dataGridTextBoxColumn6.HeaderText = "City";
   this.dataGridTextBoxColumn6.MappingName = "City";
   this.dataGridTextBoxColumn6.NullText = "";
   this.dataGridTextBoxColumn6.Width = 150;
   // 
   // dataGridTextBoxColumn7
   // 
   this.dataGridTextBoxColumn7.Format = "";
   this.dataGridTextBoxColumn7.FormatInfo = null;
   this.dataGridTextBoxColumn7.HeaderText = "Region";
   this.dataGridTextBoxColumn7.MappingName = "Region";
   this.dataGridTextBoxColumn7.NullText = "";
   this.dataGridTextBoxColumn7.Width = 150;
   // 
   // dataGridTextBoxColumn8
   // 
   this.dataGridTextBoxColumn8.Format = "";
   this.dataGridTextBoxColumn8.FormatInfo = null;
   this.dataGridTextBoxColumn8.HeaderText = "Postal Code";
   this.dataGridTextBoxColumn8.MappingName = "PostalCode";
   this.dataGridTextBoxColumn8.NullText = "";
   this.dataGridTextBoxColumn8.Width = 150;
   // 
   // dataGridTextBoxColumn9
   // 
   this.dataGridTextBoxColumn9.Format = "";
   this.dataGridTextBoxColumn9.FormatInfo = null;
   this.dataGridTextBoxColumn9.HeaderText = "Country";