[导入]老外写的winform打印类(很好用,已经测试)
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;
class DataGridViewPrinter
{
private DataGridView TheDataGridView; // The DataGridView Control which will be printed
private PrintDocument ThePrintDocument; // The PrintDocument to be used for printing
private bool IsCenterOnPage; // Determine if the report will be printed in the Top-Center of the page
private bool IsWithTitle; // Determine if the page contain title text
private string TheTitleText; // The title text to be printed in each page (if IsWithTitle is set to true)
private Font TheTitleFont; // The font to be used with the title text (if IsWithTitle is set to true)
private Color TheTitleColor; // The color to be used with the title text (if IsWithTitle is set to true)
private bool IsWithPaging; // Determine if paging is used
static int CurrentRow; // A static parameter that keep track on which Row (in the DataGridView control) that should be printed
static int PageNumber;
private int PageWidth;
private int PageHeight;
private int LeftMargin;
private int TopMargin;
private int RightMargin;
private int BottomMargin;
private float CurrentY; // A parameter that keep track on the y coordinate of the page, so the next object to be printed will start from this y coordinate
private float RowHeaderHeight;
private List<float> RowsHeight;
private List<float> ColumnsWidth;
private float TheDataGridViewWidth;
// Maintain a generic list to hold start/stop points for the column printing
// This will be used for wrapping in situations where the DataGridView will not fit on a single page
private List<int[]> mColumnPoints;
private List<float> mColumnPointsWidth;
private int mColumnPoint;
// The class constructor
public DataGridViewPrinter(DataGridView aDataGridView, PrintDocument aPrintDocument, bool CenterOnPage, bool WithTitle, string aTitleText, Font aTitleFont, Color aTitleColor, bool WithPaging)
{
TheDataGridView = aDataGridView;
ThePrintDocument = aPrintDocument;
IsCenterOnPage = CenterOnPage;
IsWithTitle = WithTitle;
TheTitleText = aTitleText;
TheTitleFont = aTitleFont;
TheTitleColor = aTitleColor;
IsWithPaging = WithPaging;
PageNumber = 0;
RowsHeight = new List<float>();
ColumnsWidth = new List<float>();
mColumnPoints = new List<int[]>();
mColumnPointsWidth = new List<float>();
// Claculating the PageWidth and the PageHeight
if (!ThePrintDocument.DefaultPageSettings.Landscape)
{
PageWidth = ThePrintDocument.DefaultPageSettings.PaperSize.Width;
PageHeight = ThePrintDocument.DefaultPageSettings.PaperSize.Height;
}
else
{
PageHeight = ThePrintDocument.DefaultPageSettings.PaperSize.Width;
PageWidth = ThePrintDocument.DefaultPageSettings.PaperSize.Height;
}
// Claculating the page margins
LeftMargin = ThePrintDocument.DefaultPageSettings.Margins.Left;
TopMargin = ThePrintDocument.DefaultPageSettings.Margins.Top;
RightMargin = ThePrintDocument.DefaultPageSettings.Margins.Right;
BottomMargin = ThePrintDocument.DefaultPageSettings.Margins.Bottom;
// First, the current row to be printed is the first row in the DataGridView control
CurrentRow = 0;
}
// The function that calculate the height of each row (including the header row), the width of each column (according to the longest text in all its cells including the header cell), and the whole DataGridView width
private void Calculate(Graphics g)
{
if (PageNumber == 0) // Just calculate once
{
SizeF tmpSize = new SizeF();
Font tmpFont;
float tmpWidth;
TheDataGridViewWidth = 0;
for (int i = 0; i < TheDataGridView.Columns.Count; i++)
{
tmpFont = TheDataGridView.ColumnHeadersDefaultCellStyle.Font;
if (tmpFont == null) // If there is no special HeaderFont style, then use the default DataGridView font style
tmpFont = TheDataGridView.DefaultCellStyle.Font;
tmpSize = g.MeasureString(TheDataGridView.Columns[i].HeaderText, tmpFont);
tmpWidth = tmpSize.Width;
RowHeaderHeight = tmpSize.Height;
for (int j = 0; j < TheDataGridView.Rows.Count; j++)
{
tmpFont = TheDataGridView.Rows[j].DefaultCellStyle.Font;
if (tmpFont == null) // If the there is no special font style of the CurrentRow, then use the default one associated with the DataGridView control
tmpFont = TheDataGridView.DefaultCellStyle.Font;
tmpSize = g.MeasureString("Anything", tmpFont);
RowsHeight.Add(tmpSize.Height);
tmpSize = g.MeasureString(TheDataGridView.Rows[j].Cells[i].EditedFormattedValue.ToString(), tmpFont);
if (tmpSize.Width > tmpWidth)
tmpWidth = tmpSize.Width;
}
if (TheDataGridView.Columns[i].Visible)
TheDataGridViewWidth += tmpWidth;
ColumnsWidth.Add(tmpWidth);
}
// Define the start/stop column points based on the page width and the DataGridView Width
// We will use this to determine the columns which are drawn on each page and how wrapping will be handled
// By default, the wrapping will occurr such that the maximum number of columns for a page will be determine
int k;
int mStartPoint = 0;
for (k = 0; k < TheDataGridView.Columns.Count; k++)
if (TheDataGridView.Columns[k].Visible)
{
mStartPoint = k;
break;
}
int mEndPoint = TheDataGridView.Columns.Count;
for (k = TheDataGridView.Columns.Count - 1; k >= 0; k--)
if (TheDataGridView.Columns[k].Visible)
{
mEndPoint = k + 1;
break;
}
float mTempWidth = TheDataGridViewWidth;
float mTempPrintArea = (float)PageWidth - (float)LeftMargin - (float)RightMargin;
// We only care about handling where the total datagridview width is bigger then the print area
if (TheDataGridViewWidth > mTempPrintArea)
{
mTempWidth = 0.0F;
for (k = 0; k < TheDataGridView.Columns.Count; k++)
{
if (TheDataGridView.Columns[k].Visible)
{
mTempWidth += ColumnsWidth[k];
// If the width is bigger than the page area, then define a new column print range
if (mTempWidth > mTempPrintArea)
{
mTempWidth -= ColumnsWidth[k];
mColumnPoints.Add(new int[] { mStartPoint, mEndPoint });
mColumnPointsWidth.Add(mTempWidth);
mStartPoint = k;
mTempWidth = ColumnsWidth[k];
}
}
// Our end point is actually one index above the current index
mEndPoint = k + 1;
}
}
// Add the last set of columns
mColumnPoints.Add(new int[] { mStartPoint, mEndPoint });
mColumnPointsWidth.Add(mTempWidth);
mColumnPoint = 0;
}
}
// The funtion that print the title, page number, and the header row
private void DrawHeader(Graphics g)
{
CurrentY = (float)TopMargin;
// Printing the page number (if isWithPaging is set to true)
if (IsWithPaging)
{
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("Tahoma", 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, new SolidBrush(Color.Black), PageStringRectangle, PageStringFormat);
CurrentY += g.MeasureString(PageString, PageStringFont).Height;
}
// Printing the title (if IsWithTitle is set to true)
if (IsWithTitle)
{
StringFormat TitleFormat = new StringFormat();
TitleFormat.Trimming = StringTrimming.Word;
TitleFormat.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.LineLimit | StringFormatFlags.NoClip;
if (IsCenterOnPage)
TitleFormat.Alignment = StringAlignment.Center;
else
TitleFormat.Alignment = StringAlignment.Near;
RectangleF TitleRectangle = new RectangleF((float)LeftMargin, CurrentY, (float)PageWidth - (float)RightMargin - (float)LeftMargin, g.MeasureString(TheTitleText, TheTitleFont).Height);
g.DrawString(TheTitleText, TheTitleFont, new SolidBrush(TheTitleColor), TitleRectangle, TitleFormat);
CurrentY += g.MeasureString(TheTitleText, TheTitleFont).Height;
}
// Calculating the starting x coordinate that the printing process will start from
float CurrentX = (float)LeftMargin;
if (IsCenterOnPage)
CurrentX += (((float)PageWidth - (float)RightMargin - (float)LeftMargin) - mColumnPointsWidth[mColumnPoint]) / 2.0F;
// Setting the HeaderFore style
Color HeaderForeColor = TheDataGridView.ColumnHeadersDefaultCellStyle.ForeColor;
if (HeaderForeColor.IsEmpty) // If there is no special HeaderFore style, then use the default DataGridView style
HeaderForeColor = TheDataGridView.DefaultCellStyle.ForeColor;
SolidBrush HeaderForeBrush = new SolidBrush(HeaderForeColor);
// Setting the HeaderBack style
Color HeaderBackColor = TheDataGridView.ColumnHeadersDefaultCellStyle.BackColor;
if (HeaderBackColor.IsEmpty) // If there is no special HeaderBack style, then use the default DataGridView style
HeaderBackColor = TheDataGridView.DefaultCellStyle.BackColor;
SolidBrush HeaderBackBrush = new SolidBrush(HeaderBackColor);
// Setting the LinePen that will be used to draw lines and rectangles (derived from the GridColor property of the DataGridView control)
Pen TheLinePen = new Pen(TheDataGridView.GridColor, 1);
// Setting the HeaderFont style
Font HeaderFont = TheDataGridView.ColumnHeadersDefaultCellStyle.Font;
if (HeaderFont == null) // If there is no special HeaderFont style, then use the default DataGridView font style
HeaderFont = TheDataGridView.DefaultCellStyle.Font;
// Calculating and drawing the HeaderBounds
RectangleF HeaderBounds = new RectangleF(CurrentX, CurrentY, mColumnPointsWidth[mColumnPoint], RowHeaderHeight);
g.FillRectangle(HeaderBackBrush, HeaderBounds);
// Setting the format that will be used to print each cell of the header row
StringFormat CellFormat = new StringFormat();
CellFormat.Trimming = StringTrimming.Word;
CellFormat.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.LineLimit | StringFormatFlags.NoClip;
// Printing each visible cell of the header row
RectangleF CellBounds;
float ColumnWidth;
for (int i = (int)mColumnPoints[mColumnPoint].GetValue(0); i < (int)mColumnPoints[mColumnPoint].GetValue(1); i++)
{
if (!TheDataGridView.Columns[i].Visible) continue; // If the column is not visible then ignore this iteration
ColumnWidth = ColumnsWidth[i];
// Check the CurrentCell alignment and apply it to the CellFormat
if (TheDataGridView.ColumnHeadersDefaultCellStyle.Alignment.ToString().Contains("Right"))
CellFormat.Alignment = StringAlignment.Far;
else if (TheDataGridView.ColumnHeadersDefaultCellStyle.Alignment.ToString().Contains("Center"))
CellFormat.Alignment = StringAlignment.Center;
else
CellFormat.Alignment = StringAlignment.Near;
CellBounds = new RectangleF(CurrentX, CurrentY, ColumnWidth, RowHeaderHeight);
// Printing the cell text
g.DrawString(TheDataGridView.Columns[i].HeaderText, HeaderFont, HeaderForeBrush, CellBounds, CellFormat);
// Drawing the cell bounds
if (TheDataGridView.RowHeadersBorderStyle != DataGridViewHeaderBorderStyle.None) // Draw the cell border only if the HeaderBorderStyle is not None
g.DrawRectangle(TheLinePen, CurrentX, CurrentY, ColumnWidth, RowHeaderHeight);
CurrentX += ColumnWidth;
}
CurrentY += RowHeaderHeight;
}
// The function that print a bunch of rows that fit in one page
// When it returns true, meaning that there are more rows still not printed, so another PagePrint action is required
// When it returns false, meaning that all rows are printed (the CureentRow parameter reaches the last row of the DataGridView control) and no further PagePrint action is required
private bool DrawRows(Graphics g)
{
// Setting the LinePen that will be used to draw lines and rectangles (derived from the GridColor property of the DataGridView control)
Pen TheLinePen = new Pen(TheDataGridView.GridColor, 1);
// The style paramters that will be used to print each cell
Font RowFont;
Color RowForeColor;
Color RowBackColor;
SolidBrush RowForeBrush;
SolidBrush RowBackBrush;
SolidBrush RowAlternatingBackBrush;
// Setting the format that will be used to print each cell
StringFormat CellFormat = new StringFormat();
CellFormat.Trimming = StringTrimming.Word;
CellFormat.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.LineLimit;
// Printing each visible cell
RectangleF RowBounds;
float CurrentX;
float ColumnWidth;
while (CurrentRow < TheDataGridView.Rows.Count)
{
if (TheDataGridView.Rows[CurrentRow].Visible) // Print the cells of the CurrentRow only if that row is visible
{
// Setting the row font style
RowFont = TheDataGridView.Rows[CurrentRow].DefaultCellStyle.Font;
if (RowFont == null) // If the there is no special font style of the CurrentRow, then use the default one associated with the DataGridView control
RowFont = TheDataGridView.DefaultCellStyle.Font;
// Setting the RowFore style
RowForeColor = TheDataGridView.Rows[CurrentRow].DefaultCellStyle.ForeColor;
if (RowForeColor.IsEmpty) // If the there is no special RowFore style of the CurrentRow, then use the default one associated with the DataGridView control
RowForeColor = TheDataGridView.DefaultCellStyle.ForeColor;
RowForeBrush = new SolidBrush(RowForeColor);
// Setting the RowBack (for even rows) and the RowAlternatingBack (for odd rows) styles
RowBackColor = TheDataGridView.Rows[CurrentRow].DefaultCellStyle.BackColor;
if (RowBackColor.IsEmpty) // If the there is no special RowBack style of the CurrentRow, then use the default one associated with the DataGridView control
{
RowBackBrush = new SolidBrush(TheDataGridView.DefaultCellStyle.BackColor);
RowAlternatingBackBrush = new SolidBrush(TheDataGridView.AlternatingRowsDefaultCellStyle.BackColor);
}
else // If the there is a special RowBack style of the CurrentRow, then use it for both the RowBack and the RowAlternatingBack styles
{
RowBackBrush = new SolidBrush(RowBackColor);
RowAlternatingBackBrush = new SolidBrush(RowBackColor);
}
// Calculating the starting x coordinate that the printing process will start from
CurrentX = (float)LeftMargin;
if (IsCenterOnPage)
CurrentX += (((float)PageWidth - (float)RightMargin - (float)LeftMargin) - mColumnPointsWidth[mColumnPoint]) / 2.0F;
// Calculating the entire CurrentRow bounds
RowBounds = new RectangleF(CurrentX, CurrentY, mColumnPointsWidth[mColumnPoint], RowsHeight[CurrentRow]);
// Filling the back of the CurrentRow
if (CurrentRow % 2 == 0)
g.FillRectangle(RowBackBrush, RowBounds);
else
g.FillRectangle(RowAlternatingBackBrush, RowBounds);
// Printing each visible cell of the CurrentRow
for (int CurrentCell = (int)mColumnPoints[mColumnPoint].GetValue(0); CurrentCell < (int)mColumnPoints[mColumnPoint].GetValue(1); CurrentCell++)
{
if (!TheDataGridView.Columns[CurrentCell].Visible) continue; // If the cell is belong to invisible column, then ignore this iteration
// Check the CurrentCell alignment and apply it to the CellFormat
if (TheDataGridView.Columns[CurrentCell].DefaultCellStyle.Alignment.ToString().Contains("Right"))
CellFormat.Alignment = StringAlignment.Far;
else if (TheDataGridView.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]);
// Printing the cell text
g.DrawString(TheDataGridView.Rows[CurrentRow].Cells[CurrentCell].EditedFormattedValue.ToString(), RowFont, RowForeBrush, CellBounds, CellFormat);
// Drawing the cell bounds
if (TheDataGridView.CellBorderStyle != DataGridViewCellBorderStyle.None) // Draw the cell border only if the CellBorderStyle is not None
g.DrawRectangle(TheLinePen, CurrentX, CurrentY, ColumnWidth, RowsHeight[CurrentRow]);
CurrentX += ColumnWidth;
}
CurrentY += RowsHeight[CurrentRow];
// Checking if the CurrentY is exceeds the page boundries
// If so then exit the function and returning true meaning another PagePrint action is required
if ((int)CurrentY > (PageHeight - TopMargin - BottomMargin))
{
CurrentRow++;
return true;
}
}
CurrentRow++;
}
CurrentRow = 0;
mColumnPoint++; // Continue to print the next group of columns
if (mColumnPoint == mColumnPoints.Count) // Which means all columns are printed
{
mColumnPoint = 0;
return false;
}
else
return true;
}
// The method that calls all other functions
public bool DrawDataGridView(Graphics g)
{
try
{
Calculate(g);
DrawHeader(g);
bool bContinue = DrawRows(g);
return bContinue;
}
catch (Exception ex)
{
MessageBox.Show("Operation failed: " + ex.Message.ToString(), Application.ProductName + " - Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
}
}
DataGridViewPrinter 就是正文里面定义的类
只需要拷贝下来，然后在PrintDocument 控件的PrintPage方法里面调用就好了
文章来源:http://xialei222.blog.163.com/blog/static/480467382008219525670
