Winform 打印DataGrid View

winform 打印原理..

1.先在画布上面画好表格

2.再在表格上面写上以前的字

 

此类不足：不能自定义 表标题的位置.以及表尾的内容. 以及 页眉 和 页脚的内容..

下次有空了记得修改：需求. 根据表格的行 和 列 ,宽和高 .自动创建出一个表格.然后可以智能设置页眉 和 页脚的内容[*****]

 

 

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

namespace Etaocn.Util
{
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;

int AreaHeight;

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;


private string [] footer;

/**/ /// <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, string [] footer)
{
this .footer = footer;

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 - 50 ;
TopMargin = printDoc.DefaultPageSettings.Margins.Top + 60 ;
RightMargin = printDoc.DefaultPageSettings.Margins.Right;
BottomMargin = printDoc.DefaultPageSettings.Margins.Bottom - 100 ;


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 " , 11 , FontStyle.Regular);
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, 1 ), 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, 1 ), 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 " , 11 , 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 ;

AreaHeight = temptop;

}

/**/ /// <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 " , 11 , 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

return hasMorePage;
}
}
}