列印DataGridView中的內容

今天，一個在澳洲工作的朋友在MSN上問我，DataGridView怎麼實現列印功能，由於很久不寫程式碼了，我在網上搜了一下簡單整理一下實現了DataGridView的列印功能。程式碼如下：

using System;

using System.Collections.Generic;

using System.Windows.Forms;

using System.Drawing;

using System.Collections;

using System.Data;

using System.Text;

namespace DgPrint

{

public class PrintService

{

private StringFormat StrFormat; // Holds content of a TextBox Cell to write by DrawString

private int RowPos;

// Position of currentlyprinting row

private bool NewPage;

// Indicates if a new page reached

private int PageNo;

// Number of pages to print

private int CellHeight;

// Height of DataGrid Cell

private int RowsPerPage;

// Number of Rows per Page

private System.Drawing.Printing.PrintDocument printDoc =

new System.Drawing.Printing.PrintDocument(); // PrintDocumnet Object used for printing

private ArrayList ColumnLefts = new ArrayList(); // Left Coordinate of Columns

private ArrayList ColumnWidths = new ArrayList(); // Width of Columns

private string PrintTitle = ""; // Header of pages

private DataTable dgv;

// Holds DataGridView Object to print its contents

private List AvailableColumns = new List(); // All Columns avaiable in DataGrid

private int HeaderHeight = 0;

private Dictionary ColWith;

public void Print(DataTable tab, string Title, Dictionary colWith)

{

PrintPreviewDialog ppvw;

try

{

// Getting DataGridView object to print

dgv = tab;

ColWith = colWith;

// Getting all Coulmns Names in the DataGridView

AvailableColumns.Clear();

foreach (DataColumn c in dgv.Columns)

{

AvailableColumns.Add(c.ColumnName);

}

// Showing the PrintOption Form

PrintTitle = Title;

RowsPerPage = 0;

printDoc.DocumentName = " ";

PrintDialog dia = new PrintDialog();

dia.PrintToFile = false;

dia.Document = printDoc;

dia.UseEXDialog = true;

if (dia.ShowDialog() != DialogResult.OK) return;

ppvw = new PrintPreviewDialog();

ppvw.WindowState = FormWindowState.Maximized;

ppvw.Document = printDoc;

// Showing the Print Preview Page

printDoc.BeginPrint += new System.Drawing.Printing.PrintEventHandler(PrintDoc_BeginPrint);

printDoc.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(PrintDoc_PrintPage);

if (ppvw.ShowDialog() != DialogResult.OK)

{

printDoc.BeginPrint -= new System.Drawing.Printing.PrintEventHandler(PrintDoc_BeginPrint);

printDoc.PrintPage -= new System.Drawing.Printing.PrintPageEventHandler(PrintDoc_PrintPage);

return;

}

// Printing the Documnet

printDoc.Print();

printDoc.BeginPrint -= new System.Drawing.Printing.PrintEventHandler(PrintDoc_BeginPrint);

printDoc.PrintPage -= new System.Drawing.Printing.PrintPageEventHandler(PrintDoc_PrintPage);

}

catch (Exception ex)

{

}

finally

{

}

}

private DataGridView grid;

public void Print(DataGridView grid, string Title)

{

PrintPreviewDialog ppvw;

try

{

// Getting DataGridView object to print

this.grid = grid;

// Getting all Coulmns Names in the DataGridView

AvailableColumns.Clear();

foreach (DataGridViewColumn c in grid.Columns)

{

if (c.Visible)

AvailableColumns.Add(c.HeaderText);

}

// Showing the PrintOption Form

PrintTitle = Title;

RowsPerPage = 0;

printDoc.DocumentName = " ";

PrintDialog dia = new PrintDialog();

dia.PrintToFile = false;

dia.Document = printDoc;

dia.UseEXDialog = true;

if (dia.ShowDialog() != DialogResult.OK) return;

ppvw = new PrintPreviewDialog();

ppvw.WindowState = FormWindowState.Maximized;

ppvw.Document = printDoc;

// Showing the Print Preview Page

printDoc.BeginPrint += new System.Drawing.Printing.PrintEventHandler(PrintGridDoc_BeginPrint);

printDoc.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(PrintGridDoc_PrintPage);

if (ppvw.ShowDialog() != DialogResult.OK)

{

printDoc.BeginPrint -= new System.Drawing.Printing.PrintEventHandler(PrintGridDoc_BeginPrint);

printDoc.PrintPage -= new System.Drawing.Printing.PrintPageEventHandler(PrintGridDoc_PrintPage);

return;

}

// Printing the Documnet

printDoc.Print();

printDoc.BeginPrint -= new System.Drawing.Printing.PrintEventHandler(PrintGridDoc_BeginPrint);

printDoc.PrintPage -= new System.Drawing.Printing.PrintPageEventHandler(PrintGridDoc_PrintPage);

}

catch (Exception ex)

{

}

finally

{

}

}

private void PrintGridDoc_BeginPrint(object sender,

System.Drawing.Printing.PrintEventArgs e)

{

try

{

StrFormat = new StringFormat();

StrFormat.Alignment = StringAlignment.Near;

StrFormat.LineAlignment = StringAlignment.Center;

StrFormat.Trimming = StringTrimming.EllipsisCharacter;

ColumnLefts.Clear();

ColumnWidths.Clear();

CellHeight = 0;

RowsPerPage = 0;

PageNo = 1;

NewPage = true;

RowPos = 0;

}

catch (Exception ex)

{

}

}

private void PrintGridDoc_PrintPage(object sender,

System.Drawing.Printing.PrintPageEventArgs e)

{

int tmpWidth, i;

int tmpTop = e.MarginBounds.Top;

int tmpLeft = e.MarginBounds.Left;

Font font = new Font("宋體", 9);

try

{

// Before starting first page, it saves Width & Height of Headers and CoulmnType

if (PageNo == 1)

{

foreach (DataGridViewColumn GridCol in grid.Columns)

{

// Skip if the current column not selected

// Detemining whether the columns are fitted to page or not.

if (GridCol.Visible)

{

tmpWidth = GridCol.Width;

HeaderHeight = 33;

// Save width & height of headres and ColumnType

ColumnLefts.Add(tmpLeft);

ColumnWidths.Add(tmpWidth);

tmpLeft += tmpWidth;

}

}

}

// Printing Current Page, Row by Row

while (RowPos <= grid.Rows.Count - 1)

{

DataGridViewRow GridRow = grid.Rows[RowPos];

CellHeight = 22;

if (tmpTop + CellHeight >= e.MarginBounds.Height + e.MarginBounds.Top)

{

DrawGridFooter(e, RowsPerPage);

NewPage = true;

PageNo++;

e.HasMorePages = true;

return;

}

else

{

if (NewPage)

{

// Draw Header

e.Graphics.DrawString(PrintTitle, new Font(font, FontStyle.Bold),

Brushes.Black, e.MarginBounds.Left, e.MarginBounds.Top -

e.Graphics.MeasureString(PrintTitle, new Font(font,

FontStyle.Bold), e.MarginBounds.Width).Height - 13);

String s = DateTime.Now.ToLongDateString() + " " + DateTime.Now.ToShortTimeString();

e.Graphics.DrawString(s, new Font(font, FontStyle.Bold),

Brushes.Black, e.MarginBounds.Left + (e.MarginBounds.Width -

e.Graphics.MeasureString(s, new Font(font,

FontStyle.Bold), e.MarginBounds.Width).Width), e.MarginBounds.Top -

e.Graphics.MeasureString(PrintTitle, new Font(new Font(font,

FontStyle.Bold), FontStyle.Bold), e.MarginBounds.Width).Height - 13);

// Draw Columns

tmpTop = e.MarginBounds.Top;

i = 0;

foreach (DataGridViewColumn GridCol in grid.Columns)

{

e.Graphics.FillRectangle(new SolidBrush(Color.LightGray),

new Rectangle((int)ColumnLefts[i], tmpTop,

(int)ColumnWidths[i], HeaderHeight));

e.Graphics.DrawRectangle(Pens.Black,

new Rectangle((int)ColumnLefts[i], tmpTop,

(int)ColumnWidths[i], HeaderHeight));

e.Graphics.DrawString(GridCol.HeaderText, font,

new SolidBrush(Color.Black),

new RectangleF((int)ColumnLefts[i], tmpTop,

(int)ColumnWidths[i], HeaderHeight), StrFormat);

i++;

}

NewPage = false;

tmpTop += HeaderHeight;

}

// Draw Columns Contents

i = 0;

foreach (DataGridViewCell Cel in GridRow.Cells)

{

e.Graphics.DrawString(Cel.Value.ToString(), font,

new SolidBrush(Color.Black),

new RectangleF((int)ColumnLefts[i], (float)tmpTop,

(int)ColumnWidths[i], (float)CellHeight), StrFormat);

// Drawing Cells Borders

e.Graphics.DrawRectangle(Pens.Black, new Rectangle((int)ColumnLefts[i],

tmpTop, (int)ColumnWidths[i], CellHeight));

i++;

}

tmpTop += CellHeight;

}

RowPos++;

// For the first page it calculates Rows per Page

if (PageNo == 1) RowsPerPage++;

}

if (RowsPerPage == 0) return;

// Write Footer (Page Number)

DrawGridFooter(e, RowsPerPage);

e.HasMorePages = false;

printDoc.DocumentName = PrintTitle;

}

catch (Exception ex)

{

}

}

private void DrawGridFooter(System.Drawing.Printing.PrintPageEventArgs e,

int RowsPerPage)

{

double cnt = 0;

cnt = grid.Rows.Count; // When the DataGridView allows adding rows

// Writing the Page Number on the Bottom of Page

string PageNum = " 第 " + PageNo.ToString()

+ " 頁，共 " + Math.Ceiling((double)(cnt / RowsPerPage)).ToString()

+ " 頁";

Font font = new Font("宋體", 9);

e.Graphics.DrawString(PageNum, font, Brushes.Black,

e.MarginBounds.Left + (e.MarginBounds.Width -

e.Graphics.MeasureString(PageNum, font,

e.MarginBounds.Width).Width) / 2, e.MarginBounds.Top +

e.MarginBounds.Height + 31);

}

private void PrintDoc_BeginPrint(object sender,

System.Drawing.Printing.PrintEventArgs e)

{

try

{

StrFormat = new StringFormat();

StrFormat.Alignment = StringAlignment.Near;

StrFormat.LineAlignment = StringAlignment.Center;

StrFormat.Trimming = StringTrimming.EllipsisCharacter;

ColumnLefts.Clear();

ColumnWidths.Clear();

CellHeight = 0;

RowsPerPage = 0;

PageNo = 1;

NewPage = true;

RowPos = 0;

}

catch (Exception ex)

{

}

}

private void PrintDoc_PrintPage(object sender,

System.Drawing.Printing.PrintPageEventArgs e)

{

int tmpWidth, i;

int tmpTop = e.MarginBounds.Top;

int tmpLeft = e.MarginBounds.Left;

Font font = new Font("宋體", 9);

try

{

// Before starting first page, it saves Width & Height of Headers and CoulmnType

if (PageNo == 1)

{

foreach (DataColumn GridCol in dgv.Columns)

{

// Skip if the current column not selected

// Detemining whether the columns are fitted to page or not.

if (ColWith.ContainsKey(GridCol.ColumnName))

tmpWidth = ColWith[GridCol.ColumnName];

else

tmpWidth = 100;

HeaderHeight = 33;

// Save width & height of headres and ColumnType

ColumnLefts.Add(tmpLeft);

ColumnWidths.Add(tmpWidth);

tmpLeft += tmpWidth;

}

}

// Printing Current Page, Row by Row

while (RowPos <= dgv.Rows.Count - 1)

{

DataRow GridRow = dgv.Rows[RowPos];

CellHeight = 22;

if (tmpTop + CellHeight >= e.MarginBounds.Height + e.MarginBounds.Top)

{

DrawFooter(e, RowsPerPage);

NewPage = true;

PageNo++;

e.HasMorePages = true;

return;

}

else

{

if (NewPage)

{

// Draw Header

e.Graphics.DrawString(PrintTitle, new Font(font, FontStyle.Bold),

Brushes.Black, e.MarginBounds.Left, e.MarginBounds.Top -

e.Graphics.MeasureString(PrintTitle, new Font(font,

FontStyle.Bold), e.MarginBounds.Width).Height - 13);

String s = DateTime.Now.ToLongDateString() + " " + DateTime.Now.ToShortTimeString();

e.Graphics.DrawString(s, new Font(font, FontStyle.Bold),

Brushes.Black, e.MarginBounds.Left + (e.MarginBounds.Width -

e.Graphics.MeasureString(s, new Font(font,

FontStyle.Bold), e.MarginBounds.Width).Width), e.MarginBounds.Top -

e.Graphics.MeasureString(PrintTitle, new Font(new Font(font,

FontStyle.Bold), FontStyle.Bold), e.MarginBounds.Width).Height - 13);

// Draw Columns

tmpTop = e.MarginBounds.Top;

i = 0;

foreach (DataColumn GridCol in dgv.Columns)

{

e.Graphics.FillRectangle(new SolidBrush(Color.LightGray),

new Rectangle((int)ColumnLefts[i], tmpTop,

(int)ColumnWidths[i], HeaderHeight));

e.Graphics.DrawRectangle(Pens.Black,

new Rectangle((int)ColumnLefts[i], tmpTop,

(int)ColumnWidths[i], HeaderHeight));

e.Graphics.DrawString(GridCol.ColumnName, font,

new SolidBrush(Color.Black),

new RectangleF((int)ColumnLefts[i], tmpTop,

(int)ColumnWidths[i], HeaderHeight), StrFormat);

i++;

}

NewPage = false;

tmpTop += HeaderHeight;

}

// Draw Columns Contents

i = 0;

foreach (Object Cel in GridRow.ItemArray)

{

e.Graphics.DrawString(Cel.ToString(), font,

new SolidBrush(Color.Black),

new RectangleF((int)ColumnLefts[i], (float)tmpTop,

(int)ColumnWidths[i], (float)CellHeight), StrFormat);

// Drawing Cells Borders

e.Graphics.DrawRectangle(Pens.Black, new Rectangle((int)ColumnLefts[i],

tmpTop, (int)ColumnWidths[i], CellHeight));

i++;

}

tmpTop += CellHeight;

}

RowPos++;

// For the first page it calculates Rows per Page

if (PageNo == 1) RowsPerPage++;

}

if (RowsPerPage == 0) return;

// Write Footer (Page Number)

DrawFooter(e, RowsPerPage);

e.HasMorePages = false;

printDoc.DocumentName = PrintTitle;

}

catch (Exception ex)

{

}

}

private void DrawFooter(System.Drawing.Printing.PrintPageEventArgs e,

int RowsPerPage)

{

double cnt = 0;

cnt = dgv.Rows.Count; // When the DataGridView allows adding rows

// Writing the Page Number on the Bottom of Page

string PageNum = " 第 " + PageNo.ToString()

+ " 頁，共 " + Math.Ceiling((double)(cnt / RowsPerPage)).ToString()

+ " 頁";

Font font = new Font("宋體", 9);

e.Graphics.DrawString(PageNum, font, Brushes.Black,

e.MarginBounds.Left + (e.MarginBounds.Width -

e.Graphics.MeasureString(PageNum, font,

e.MarginBounds.Width).Width) / 2, e.MarginBounds.Top +

e.MarginBounds.Height + 31);

}

}

}