//調用GridPrinter

首先添加一個printDocument控件并激活其printDocument_PrintPage事件寫：

實例化類GridPrinter gridPrinter;

private void printDocument_PrintPage(object sender,System.Drawing.Printing.PrintPageEventArgs e)
{
bool more = gridPrinter.DrawDataGridView(e.Graphics);
if (more == true)
e.HasMorePages = true;
}

//定義一個bool方法

private bool InitializePrinting()
{
PrintDialog printDialog = new PrintDialog();
//printDialog.AllowCurrentPage = true;
//printDialog.AllowPrintToFile = true;
//printDialog.AllowSelection = true;
//printDialog.AllowSomePages = true;
//printDialog.PrintToFile = true;
//printDialog.ShowHelp = true;
//printDialog.ShowNetwork = true;

if (printDialog.ShowDialog() != DialogResult.OK)
return false;

printDocument.DocumentName = "人員基本信息";
printDocument.PrinterSettings = printDialog.PrinterSettings;
printDocument.DefaultPageSettings=printDialog.PrinterSettings.DefaultPageSettings;
printDocument.DefaultPageSettings.Margins = new Margins(40, 40, 40,40);

gridPrinter = new GridPrinter(dataGridView1, printDocument, true,true, "人員基本信息", new Font("黑體", 18, FontStyle.Bold,GraphicsUnit.Point), Color.Blue, true);
return true;
}

//打印按鈕中添加如下代碼：

if (InitializePrinting())
{
PrintPreviewDialog printPreviewDialog = newPrintPreviewDialog();
printPreviewDialog.Document = printDocument;
printPreviewDialog.ShowDialog();
}

//運行效果如圖所示：

點確定按鈕后如圖所示：

//公用打印類

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

public class GridPrinter
{
// the gridto print
privateDataGridView dataGridView;

// thePrintDocument
privatePrintDocument printDocument;

// centerprintout?
private boolcenterOnPage;

// has atitle?
private boolhasTitle;

//title
privatestring title;

//font
private FonttitleFont;

// titlecolor
privateColor titleColor;

// usepaging?
private boolpaging;

// rowprinting
static intcurrentRow;

// pageprinting
static intpageNumber;

// pagewidth
private intpageWidth;

// pageheight
private intpageHeight;

// leftmargin
private intleftMargin;

// topmargin
private inttopMargin;

// rightmargin
private intrightMargin;

// bottommargin
private intbottomMargin;

// ylocation placeholder
privatefloat currentY;

// gridsizes
privatefloat rowHeaderHeight;
privateList<float> rowsHeight;
privateList<float> columnsWidth;
privatefloat dataGridViewWidth;

// columnstop points
privateList<int[]> mColumnPoints;
privateList<float> mColumnPointsWidth;
private intmColumnPoint;

publicGridPrinter(DataGridView objDataGridView, PrintDocumentobjPrintDocument, bool bCenterOnPage, bool bHasTitle, stringsTitle, Font objTitleFont, Color objTitleColor, bool bPaging)
{
dataGridView = objDataGridView;
printDocument = objPrintDocument;
centerOnPage = bCenterOnPage;
hasTitle = bHasTitle;
title = sTitle;
titleFont = objTitleFont;
titleColor = objTitleColor;
paging = bPaging;

pageNumber = 0;

rowsHeight = new List<float>();
columnsWidth = new List<float>();

mColumnPoints = newList<int[]>();
mColumnPointsWidth = newList<float>();

if (!printDocument.DefaultPageSettings.Landscape)
{
pageWidth =printDocument.DefaultPageSettings.PaperSize.Width;
pageHeight =printDocument.DefaultPageSettings.PaperSize.Height;
}
else
{
pageHeight =printDocument.DefaultPageSettings.PaperSize.Width;
pageWidth =printDocument.DefaultPageSettings.PaperSize.Height;
}

leftMargin = printDocument.DefaultPageSettings.Margins.Left;
topMargin = printDocument.DefaultPageSettings.Margins.Top;
rightMargin =printDocument.DefaultPageSettings.Margins.Right;
bottomMargin =printDocument.DefaultPageSettings.Margins.Bottom;

currentRow = 0;
}

//calculate printing metrics
private voidCalculate(Graphics g)
{
if (pageNumber == 0)
{
SizeF tmpSize = new SizeF();
Font tmpFont;
float tmpWidth;

dataGridViewWidth = 0;
for (int i = 0; i < dataGridView.Columns.Count;i++)
{
tmpFont = dataGridView.ColumnHeadersDefaultCellStyle.Font;
if (tmpFont == null)
tmpFont = dataGridView.DefaultCellStyle.Font;

tmpSize = g.MeasureString(dataGridView.Columns[i].HeaderText,tmpFont);
tmpWidth = tmpSize.Width;
rowHeaderHeight = tmpSize.Height;

for (int j = 0; j < dataGridView.Rows.Count;j++)
{
tmpFont = dataGridView.Rows[j].DefaultCellStyle.Font;
if (tmpFont == null)
tmpFont = dataGridView.DefaultCellStyle.Font;

tmpSize = g.MeasureString("Anything", tmpFont);
rowsHeight.Add(tmpSize.Height);

tmpSize =g.MeasureString(dataGridView.Rows[j].Cells[i].EditedFormattedValue.ToString(),tmpFont);
if (tmpSize.Width > tmpWidth)
tmpWidth = tmpSize.Width;
}
if (dataGridView.Columns[i].Visible)
dataGridViewWidth += tmpWidth;
columnsWidth.Add(tmpWidth);
}

int k;

int mStartPoint = 0;
for (k = 0; k < dataGridView.Columns.Count;k++)
if (dataGridView.Columns[k].Visible)
{
mStartPoint = k;
break;
}

int mEndPoint = dataGridView.Columns.Count;
for (k = dataGridView.Columns.Count - 1; k >= 0;k--)
if (dataGridView.Columns[k].Visible)
{
mEndPoint = k + 1;
break;
}

float mTempWidth = dataGridViewWidth;
float mTempPrintArea = (float)pageWidth - (float)leftMargin -(float)rightMargin;

if (dataGridViewWidth > mTempPrintArea)
{
mTempWidth = 0.0F;
for (k = 0; k < dataGridView.Columns.Count;k++)
{
if (dataGridView.Columns[k].Visible)
{
mTempWidth += columnsWidth[k];
if (mTempWidth > mTempPrintArea)
{
mTempWidth -= columnsWidth[k];
mColumnPoints.Add(new int[] { mStartPoint, mEndPoint });
mColumnPointsWidth.Add(mTempWidth);
mStartPoint = k;
mTempWidth = columnsWidth[k];
}
}
mEndPoint = k + 1;
}
}

mColumnPoints.Add(new int[] { mStartPoint, mEndPoint });
mColumnPointsWidth.Add(mTempWidth);
mColumnPoint = 0;
}
}

// headerprinting
private voidDrawHeader(Graphics g)
{
currentY = (float)topMargin;

if (paging)
{
pageNumber++;
string PageString = "Page " + pageNumber.ToString();

StringFormat PageStringFormat = new StringFormat();
PageStringFormat.Trimming = StringTrimming.Word;
PageStringFormat.FormatFlags = StringFormatFlags.NoWrap |StringFormatFlags.LineLimit | StringFormatFlags.NoClip;
PageStringFormat.Alignment = StringAlignment.Far;

Font PageStringFont = new Font("Arial", 8, FontStyle.Regular,GraphicsUnit.Point);

RectangleF PageStringRectangle = new RectangleF((float)leftMargin,currentY, (float)pageWidth - (float)rightMargin -(float)leftMargin, g.MeasureString(PageString,PageStringFont).Height);

g.DrawString(PageString, PageStringFont, newSolidBrush(Color.Black), PageStringRectangle,PageStringFormat);

currentY += g.MeasureString(PageString,PageStringFont).Height;
}

if (hasTitle)
{
StringFormat TitleFormat = new StringFormat();
TitleFormat.Trimming = StringTrimming.Word;
TitleFormat.FormatFlags = StringFormatFlags.NoWrap |StringFormatFlags.LineLimit | StringFormatFlags.NoClip;
if (centerOnPage)
TitleFormat.Alignment = StringAlignment.Center;
else
TitleFormat.Alignment = StringAlignment.Near;

RectangleF TitleRectangle = new RectangleF((float)leftMargin,currentY, (float)pageWidth - (float)rightMargin -(float)leftMargin, g.MeasureString(title, titleFont).Height);

g.DrawString(title, titleFont, new SolidBrush(titleColor),TitleRectangle, TitleFormat);

currentY += g.MeasureString(title, titleFont).Height;
}

float CurrentX = (float)leftMargin;
if(centerOnPage)
CurrentX += (((float)pageWidth - (float)rightMargin -(float)leftMargin) - mColumnPointsWidth[mColumnPoint]) / 2.0F;

Color HeaderForeColor =dataGridView.ColumnHeadersDefaultCellStyle.ForeColor;
if (HeaderForeColor.IsEmpty)
HeaderForeColor = dataGridView.DefaultCellStyle.ForeColor;
SolidBrush HeaderForeBrush = new SolidBrush(HeaderForeColor);

Color HeaderBackColor =dataGridView.ColumnHeadersDefaultCellStyle.BackColor;
if (HeaderBackColor.IsEmpty)
HeaderBackColor = dataGridView.DefaultCellStyle.BackColor;
SolidBrush HeaderBackBrush = new SolidBrush(HeaderBackColor);

Pen TheLinePen = new Pen(dataGridView.GridColor, 1);

Font HeaderFont =dataGridView.ColumnHeadersDefaultCellStyle.Font;
if (HeaderFont == null)
HeaderFont = dataGridView.DefaultCellStyle.Font;

RectangleF HeaderBounds = new RectangleF(CurrentX, currentY,mColumnPointsWidth[mColumnPoint], rowHeaderHeight);
g.FillRectangle(HeaderBackBrush, HeaderBounds);

StringFormat CellFormat = new StringFormat();
CellFormat.Trimming = StringTrimming.Word;
CellFormat.FormatFlags = StringFormatFlags.NoWrap |StringFormatFlags.LineLimit | StringFormatFlags.NoClip;

RectangleF CellBounds;
floatColumnWidth;
for (int i = (int)mColumnPoints[mColumnPoint].GetValue(0); i< (int)mColumnPoints[mColumnPoint].GetValue(1);i++)
{
if (!dataGridView.Columns[i].Visible) continue;

ColumnWidth = columnsWidth[i];

if(dataGridView.ColumnHeadersDefaultCellStyle.Alignment.ToString().Contains("Right"))
CellFormat.Alignment = StringAlignment.Far;
else if(dataGridView.ColumnHeadersDefaultCellStyle.Alignment.ToString().Contains("Center"))
CellFormat.Alignment = StringAlignment.Center;
else
CellFormat.Alignment = StringAlignment.Near;

CellBounds = new RectangleF(CurrentX, currentY, ColumnWidth,rowHeaderHeight);

g.DrawString(dataGridView.Columns[i].HeaderText, HeaderFont,HeaderForeBrush, CellBounds, CellFormat);

if (dataGridView.RowHeadersBorderStyle !=DataGridViewHeaderBorderStyle.None)
g.DrawRectangle(TheLinePen, CurrentX, currentY, ColumnWidth,rowHeaderHeight);

CurrentX += ColumnWidth;
}

currentY += rowHeaderHeight;
}

// commonrow printing function
private boolDrawRows(Graphics g)
{
Pen TheLinePen = new Pen(dataGridView.GridColor,1);

Font RowFont;
Color RowForeColor;
Color RowBackColor;
SolidBrush RowForeBrush;
SolidBrush RowBackBrush;
SolidBrush RowAlternatingBackBrush;

StringFormat CellFormat = new StringFormat();
CellFormat.Trimming = StringTrimming.Word;
CellFormat.FormatFlags = StringFormatFlags.NoWrap |StringFormatFlags.LineLimit;

RectangleF RowBounds;
float CurrentX;
float ColumnWidth;
while (currentRow < dataGridView.Rows.Count)
{
if (dataGridView.Rows[currentRow].Visible)
{
RowFont =dataGridView.Rows[currentRow].DefaultCellStyle.Font;
if (RowFont == null)
RowFont = dataGridView.DefaultCellStyle.Font;

RowForeColor =dataGridView.Rows[currentRow].DefaultCellStyle.ForeColor;
if (RowForeColor.IsEmpty)
RowForeColor = dataGridView.DefaultCellStyle.ForeColor;
RowForeBrush = new SolidBrush(RowForeColor);

RowBackColor =dataGridView.Rows[currentRow].DefaultCellStyle.BackColor;
if (RowBackColor.IsEmpty)
{
RowBackBrush = newSolidBrush(dataGridView.DefaultCellStyle.BackColor);
RowAlternatingBackBrush = newSolidBrush(dataGridView.AlternatingRowsDefaultCellStyle.BackColor);
}
else
{
RowBackBrush = new SolidBrush(RowBackColor);
RowAlternatingBackBrush = new SolidBrush(RowBackColor);
}

CurrentX = (float)leftMargin;
if(centerOnPage)
CurrentX += (((float)pageWidth - (float)rightMargin -(float)leftMargin) - mColumnPointsWidth[mColumnPoint]) / 2.0F;

RowBounds = new RectangleF(CurrentX, currentY,mColumnPointsWidth[mColumnPoint], rowsHeight[currentRow]);

if (currentRow % 2 == 0)
g.FillRectangle(RowBackBrush, RowBounds);
else
g.FillRectangle(RowAlternatingBackBrush, RowBounds);

for (int CurrentCell =(int)mColumnPoints[mColumnPoint].GetValue(0); CurrentCell< (int)mColumnPoints[mColumnPoint].GetValue(1);CurrentCell++)
{
if (!dataGridView.Columns[CurrentCell].Visible) continue;

if(dataGridView.Columns[CurrentCell].DefaultCellStyle.Alignment.ToString().Contains("Right"))
CellFormat.Alignment = StringAlignment.Far;
else if(dataGridView.Columns[CurrentCell].DefaultCellStyle.Alignment.ToString().Contains("Center"))
CellFormat.Alignment = StringAlignment.Center;
else
CellFormat.Alignment = StringAlignment.Near;

ColumnWidth = columnsWidth[CurrentCell];
RectangleF CellBounds = new RectangleF(CurrentX, currentY,ColumnWidth, rowsHeight[currentRow]);

g.DrawString(dataGridView.Rows[currentRow].Cells[CurrentCell].EditedFormattedValue.ToString(),RowFont, RowForeBrush, CellBounds, CellFormat);

if (dataGridView.CellBorderStyle !=DataGridViewCellBorderStyle.None)
g.DrawRectangle(TheLinePen, CurrentX, currentY, ColumnWidth,rowsHeight[currentRow]);

CurrentX += ColumnWidth;
}
currentY += rowsHeight[currentRow];

if ((int)currentY > (pageHeight - topMargin -bottomMargin))
{
currentRow++;
return true;
}
}
currentRow++;
}

currentRow = 0;
mColumnPoint++;

if (mColumnPoint == mColumnPoints.Count)
{
mColumnPoint = 0;
return false;
}
else
return true;
}

// themain grid printing method
public boolDrawDataGridView(Graphics g)
{
try
{
Calculate(g);
DrawHeader(g);
bool bContinue = DrawRows(g);
return bContinue;
}
catch (Exception ex)
{

MessageBox.Show("ERROR: " + ex.Message.ToString(),Application.ProductName, MessageBoxButtons.OK,MessageBoxIcon.Error);
return false;
}
}
}

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