[asp.net]c# winform打印类

using System;

using System.Collections.Generic;

using System.Text;

using System.Windows.Forms;

using System.Drawing.Printing;

using System.Drawing;

namespace Lds2013

{

/**//// <summary>

/// 打印类

/// </summary>

public class Printer

{

private DataGridView dataview;

private PrintDocument printDoc;

//打印有效区域的宽度

int width;

int height;

int columns;

double Rate;

bool hasMorePage = false;

int currRow = 0;

int rowHeight = 20;

//打印页数

int PageNumber;

//当前打印页的行数

int pageSize = 20;

//当前打印的页码

int PageIndex;

private int PageWidth; //打印纸的宽度

private int PageHeight; //打印纸的高度

private int LeftMargin; //有效打印区距离打印纸的左边大小

private int TopMargin;//有效打印区距离打印纸的上面大小

private int RightMargin;//有效打印区距离打印纸的右边大小

private int BottomMargin;//有效打印区距离打印纸的下边大小

int rows;

/**//// <summary>

/// 构造函数

/// </summary>

/// <param name="dataview">要打印的DateGridView</param>

/// <param name="printDoc">PrintDocument用于获取打印机的设置</param>

public Printer(DataGridView dataview, PrintDocument printDoc)

{

this.dataview = dataview;

this.printDoc = printDoc;

PageIndex = 0;

//获取打印数据的具体行数

this.rows = dataview.RowCount;

this.columns = dataview.ColumnCount;

//判断打印设置是否是横向打印

if (!printDoc.DefaultPageSettings.Landscape)

{

PageWidth = printDoc.DefaultPageSettings.PaperSize.Width;

PageHeight = printDoc.DefaultPageSettings.PaperSize.Height;

}

else

{

PageHeight = printDoc.DefaultPageSettings.PaperSize.Width;

PageWidth = printDoc.DefaultPageSettings.PaperSize.Height;

}

LeftMargin = printDoc.DefaultPageSettings.Margins.Left;

TopMargin = printDoc.DefaultPageSettings.Margins.Top;

RightMargin = printDoc.DefaultPageSettings.Margins.Right;

BottomMargin = printDoc.DefaultPageSettings.Margins.Bottom;

height = PageHeight - TopMargin - BottomMargin - 2;

width = PageWidth - LeftMargin - RightMargin - 2;

double tempheight = height;

double temprowHeight = rowHeight;

while (true)

{

string temp = Convert.ToString(tempheight / Math.Round(temprowHeight, 3));

int i = temp.IndexOf('.');

double tt = 100;

if (i != -1)

{

tt = Math.Round(Convert.ToDouble(temp.Substring(temp.IndexOf('.'))), 3);

}

if (tt <= 0.01)

{

rowHeight = Convert.ToInt32(temprowHeight);

break;

}

else

{

temprowHeight = temprowHeight + 0.01;

}

}

pageSize = height / rowHeight;

if ((rows + 1) <= pageSize)

{

pageSize = rows + 1;

PageNumber = 1;

}

else

{

PageNumber = rows / (pageSize - 1);

if (rows % (pageSize - 1) != 0)

{

PageNumber = PageNumber + 1;

}

}

}

/**//// <summary>

/// 初始化打印

/// </summary>

private void InitPrint()

{

PageIndex = PageIndex + 1;

if (PageIndex == PageNumber)

{

hasMorePage = false;

if (PageIndex != 1)

{

pageSize = rows % (pageSize - 1) + 1;

}

}

else

{

hasMorePage = true;

}

}

//打印头

private void DrawHeader(Graphics g)

{

Font font = new Font("宋体", 12, FontStyle.Bold);

int temptop = (rowHeight / 2) + TopMargin + 1;

int templeft = LeftMargin + 1;

for (int i = 0; i < this.columns; i++)

{

string headString = this.dataview.Columns[i].HeaderText;

float fontHeight = g.MeasureString(headString, font).Height;

float fontwidth = g.MeasureString(headString, font).Width;

float temp = temptop - (fontHeight) / 3;

g.DrawString(headString, font, Brushes.Black, new PointF(templeft, temp));

templeft = templeft + (int)(this.dataview.Columns[i].Width / Rate) + 1;

}

}

//画表格

private void DrawTable(Graphics g)

{

Rectangle border = new Rectangle(LeftMargin, TopMargin, width, (pageSize) * rowHeight);

g.DrawRectangle(new Pen(Brushes.Black, 2), border);

for (int i = 1; i < pageSize; i++)

{

if (i != 1)

{

g.DrawLine(new Pen(Brushes.Black, 1), new Point(LeftMargin + 1, (rowHeight * i) + TopMargin + 1), new Point(width + LeftMargin, (rowHeight * i) + TopMargin + 1));

}

else

{

g.DrawLine(new Pen(Brushes.Black, 2), new Point(LeftMargin + 1, (rowHeight * i) + TopMargin + 1), new Point(width + LeftMargin, (rowHeight * i) + TopMargin + 1));

}

}

//计算出列的总宽度和打印纸比率

Rate = Convert.ToDouble(GetDateViewWidth()) / Convert.ToDouble(width);

int tempLeft = LeftMargin + 1;

int endY = (pageSize) * rowHeight + TopMargin;

for (int i = 1; i < columns; i++)

{

tempLeft = tempLeft + 1 + (int)(this.dataview.Columns[i - 1].Width / Rate);

g.DrawLine(new Pen(Brushes.Black, 1), new Point(tempLeft, TopMargin), new Point(tempLeft, endY));

}

}

/**//// <summary>

/// 获取打印的列的总宽度

/// </summary>

/// <returns></returns>

private int GetDateViewWidth()

{

int total = 0;

for (int i = 0; i < this.columns; i++)

{

total = total + this.dataview.Columns[i].Width;

}

return total;

}

//打印行数据

private void DrawRows(Graphics g)

{

Font font = new Font("宋体", 12, FontStyle.Regular);

int temptop = (rowHeight / 2) + TopMargin + 1 + rowHeight;

for (int i = currRow; i < pageSize + currRow - 1; i++)

{

int templeft = LeftMargin + 1;

for (int j = 0; j < columns; j++)

{

string headString = this.dataview.Rows[i].Cells[j].Value.ToString();

float fontHeight = g.MeasureString(headString, font).Height;

float fontwidth = g.MeasureString(headString, font).Width;

float temp = temptop - (fontHeight) / 3;

while (true)

{

if (fontwidth <= (int)(this.dataview.Columns[j].Width / Rate))

{

break;

}

else

{

headString = headString.Substring(0, headString.Length - 1);

fontwidth = g.MeasureString(headString, font).Width;

}

}

g.DrawString(headString, font, Brushes.Black, new PointF(templeft, temp));

templeft = templeft + (int)(this.dataview.Columns[j].Width / Rate) + 1;

}

temptop = temptop + rowHeight;

}

currRow = pageSize + currRow - 1;

}

/**//// <summary>

/// 在PrintDocument中的PrintPage方法中调用

/// </summary>

/// <param name="g">传入PrintPage中PrintPageEventArgs中的Graphics</param>

/// <returns>是否还有打印页 有返回true，无则返回false</returns>

public bool Print(Graphics g)

{

InitPrint();

DrawTable(g);

DrawHeader(g);

DrawRows(g);

//打印页码

string pagestr = PageIndex + " / " + PageNumber;

Font font = new Font("宋体", 12, FontStyle.Regular);

g.DrawString(pagestr, font, Brushes.Black, new PointF((PageWidth / 2) - g.MeasureString(pagestr, font).Width, PageHeight - (BottomMargin / 2) - g.MeasureString(pagestr, font).Height));

//打印查询的功能项名称

string temp = dataview.Tag.ToString() + " " + DateTime.Now.ToString("yyyy-MM-dd HH:mm");

g.DrawString(temp, font, Brushes.Black, new PointF(PageWidth - 5 - g.MeasureString(temp, font).Width, PageHeight - 5 - g.MeasureString(temp, font).Height));

return hasMorePage;

}

}

}