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2018-12-14
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摘要：本文主要向大家介绍了C#编程之C# winform绘图图面打印功能，通过具体的内容向大家展示，希望对大家学习C#编程有所帮助。
本文主要向大家介绍了C#编程之C# winform绘图图面打印功能，通过具体的内容向大家展示，希望对大家学习C#编程有所帮助。
打印类代码如下：
public class Printer
{
private DataGridView dataview;
private PrintDocument printDoc;
private Font printFontStyle;
//打印有效区域的宽度
int width;
int height;
int columns;
double Rate;//打印宽度和纸张的比例
bool hasMorePage = false;//是否跨页
int currRow = 0;
int rowHeight = 61;
//打印页数
int PageNumber;
//当前打印页的行数,默认打印行数
int pageSize = 20;
//当前打印的页码
int PageIndex=0;
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;
////
///
要打印的DateGridView
///
PrintDocument用于获取打印机的设置
public Printer(DataGridView dataview, Font fontStyle, PrintDocument printDoc, string[] footer)
{
this.footer = footer;
this.dataview = dataview;
this.printDoc = printDoc;
this.printFontStyle = fontStyle;
//PageIndex = 0;
//获取打印数据的具体行数
this.rows = dataview.RowCount-1;
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<20?20: printDoc.DefaultPageSettings.Margins.Left;
TopMargin = printDoc.DefaultPageSettings.Margins.Top<20?20: printDoc.DefaultPageSettings.Margins.Top;
RightMargin = printDoc.DefaultPageSettings.Margins.Right < 20 ? 20: printDoc.DefaultPageSettings.Margins.Right;
BottomMargin = printDoc.DefaultPageSettings.Margins.Bottom < 20 ? 20 : printDoc.DefaultPageSettings.Margins.Bottom;
height = PageHeight - TopMargin - BottomMargin - 5;
width = PageWidth - LeftMargin - RightMargin - 5;
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;
}
}
}
///
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)
{
//根据比例调整字体大小
double newsize = (printFontStyle.Size / Rate);
if (newsize <= 10)
{
newsize = 10;
}
Font newfont = new Font("宋体", (float)newsize, 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, newfont).Height;
float fontwidth = g.MeasureString(headString, newfont).Width;
float temp = temptop - (fontHeight) / 3;
int colWidth = (int)(this.dataview.Columns[i].Width / Rate);
int newtempleft = 0;
//判读内容是否比宽度长
if (colWidth > fontwidth)//居中
{
newtempleft = templeft + (int)((float)colWidth- fontwidth) / 2 + 1;
}
else
{
while (true)
{
if (fontwidth <= colWidth)
{
break;
}
else
{
headString = headString.Substring(0, headString.Length - 1);
fontwidth = g.MeasureString(headString, newfont).Width;
}
}
newtempleft = templeft + (int)((float)colWidth - fontwidth) / 2 + 1;
}
g.DrawString(headString, newfont, Brushes.Black, new PointF(newtempleft, 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));
}
}
///
///
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);
//根据比例调整字体大小
double newsize = (printFontStyle.Size / Rate);
if (newsize <= 10)
{
newsize = 10;
}
Font newfont = new Font("宋体", (float)newsize, FontStyle.Regular);
int temptop = (rowHeight / 2) + TopMargin + 1 + rowHeight;//垂直居中
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==null?"":this.dataview.Rows[i].Cells[j].Value.ToString();
float fontHeight = g.MeasureString(headString, newfont).Height;
float fontwidth = g.MeasureString(headString, newfont).Width;
int colWidth = (int)(this.dataview.Columns[j].Width / Rate);
float temp = temptop - (fontHeight) / 3;
int newtempleft = 0;
//判读内容是否比宽度长
if (colWidth > fontwidth)//居中
{
newtempleft = templeft + (int)((float)colWidth - fontwidth) / 2 + 1;
g.DrawString(headString, newfont, Brushes.Black, new PointF(newtempleft, temp));
}
else
{
// int line= Math.Ceiling((double)(fontwidth / colWidth));
string tempi = Convert.ToString((double)(fontwidth /colWidth));
string []tei = tempi.Split(‘.‘);
int line = int.Parse(tei[0])+ (tei.Count()>0?1:0);
int lineWidth = (int)headString.Length / line;
string newHeadString = "";
string lastHeadString = headString;
int linti = 0;
while (true)
{
linti++;
newHeadString += lastHeadString.Substring(0, lineWidth> lastHeadString.Length? lastHeadString.Length: lineWidth) + "\r\n";
if (lineWidth <= lastHeadString.Length)
{
lastHeadString = lastHeadString.Substring(lineWidth, lastHeadString.Length - lineWidth);
}
else
{ lastHeadString = ""; }
if(lastHeadString=="")
break;
//if (fontwidth <= colWidth)
//{
// break;
//}
//else
//{
// headString = headString.Substring(0, headString.Length - 1);
// fontwidth = g.MeasureString(headString, newfont).Width;
//}
}
headString = newHeadString.TrimEnd(‘n‘,‘\\‘,‘r‘);
newtempleft = templeft + (int)((float)colWidth - fontwidth/ line) / 2 + 1;
//newtempleft = templeft;
temp = linti * fontHeight > rowHeight? (temp- fontHeight) :(temp-(fontHeight / 3)* (line-1));
g.DrawString(headString, newfont, Brushes.Black, new PointF(newtempleft, temp ));
}
templeft = templeft + (int)(this.dataview.Columns[j].Width / Rate) + 1;
}
temptop = temptop + rowHeight;
}
currRow = pageSize + currRow - 1;
AreaHeight = temptop;
}
///
///
传入PrintPage中PrintPageEventArgs中的Graphics
///
public bool Print(Graphics g)
{
InitPrint();
DrawTable(g);
DrawHeader(g);
DrawRows(g);
//打印页码
string pagestr = PageIndex + " / " + PageNumber;
Font font = new System.Drawing.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;
}
}
View Code
主要运用打印类如下：
1.打印预览调用
Font txtFont = new Font("宋体", 12, FontStyle.Regular);//正文字体 newPrint = new Printer(printDataGridView, txtFont, pd, null); pd.PrintPage += new PrintPageEventHandler(printDocument_PrintPage);
if (printDataGridView.Rows.Count > 0) { bool hasMorePage=newPrint.Print(ev.Graphics); ev.HasMorePages = hasMorePage; } else { MessageBox.Show("没有需要打印的数据"); }
2.打印预览调用
if (!flag) { Font txtFont = new Font("宋体", 12, FontStyle.Regular);//正文字体 newPrint = new Printer(printDataGridView, txtFont, pd, null); pd.PrintPage -= new PrintPageEventHandler(printDocument_PrintPage); pd.PrintPage += new PrintPageEventHandler(printDocument_PrintPage); } previewDialog.Document = pd;//指向要打印的对象 previewDialog.ShowDialog();//打印预览对话框显示出来
3.打印设置
private void printDialog_Click(object sender, EventArgs e) { pageSetupDialog.Document = pd; pageSetupDialog.ShowDialog(); }
本文由职坐标整理并发布，希望对同学们有所帮助。了解更多详情请关注职坐标编程语言C#.NET频道！
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