[C#] 打印DataGridView类

来源：http://topic.csdn.net/u/20081111/14/84a390dd-5665-445e-897a-2c728dd865b8.html

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);
        }
    }
}