C#学习(1):C#编写的可打印正弦曲线程序

PrintableForm.csusing System;using System.Drawing;using System.Windows.Forms;using System.Drawing.Printing;namespace Printable{class PrintableForm:Form //继承Form类{ public PrintableForm() //构造函数 { Text = "Printable Form"; //窗口标题 BackColor = SystemColors.Window; //窗口客户区背景色 ForeColor = SystemColors.WindowText;//窗口客户区字体颜色 ResizeRedraw = true; //窗口size改变时重绘(redraw) } protected override void OnPaint(PaintEventArgs pea) //绘制窗口函数 { DoPage(pea.Graphics,ForeColor,ClientSize.Width,ClientSize.Height); } protected override void OnClick(EventArgs ea) //点击鼠标，进行打印 { PrintDocument prindoc = new PrintDocument(); prindoc.DocumentName = Text; //打印文档名 prindoc.PrintPage+=new PrintPageEventHandler(PrintDocumentOnPrintPage); prindoc.Print(); //打印 } void PrintDocumentOnPrintPage(object obj,PrintPageEventArgs ppea) { Graphics gftx = ppea.Graphics; //获取图形对象 SizeF sizef = gftx.VisibleClipBounds.Size; DoPage(gftx,Color.Black,(int)sizef.Width,(int)sizef.Height); } protected virtual void DoPage(Graphics gftx,Color clr,int cx,int cy) //实际绘制函数 { // Pen pen = new Pen(clr); // gftx.DrawLine(pen,0,0,cx-1,cy-1); // gftx.DrawLine(pen,cx-1,0,0,cy-1); }}}//主程序：SineCurve.csusing System;using System.Windows.Forms;using System.Drawing;using Printable;class SineCurve:PrintableForm { public static void Main() { Application.Run(new SineCurve()); } public SineCurve() { Text = "Sine Curve"; } protected override void DoPage(Graphics gftx,Color clr,int cx,int cy) { PointF[] aptf = new PointF[cx]; for (int i=0;i { aptf[i].X = i; aptf[i].Y = cy / 2 * (1 - (float)Math.Sin(i * 2 * Math.PI / (cx - 1))); } gftx.DrawLines(new Pen(clr),aptf); }} 

 

如果用的vs2008,需要add References:System,System.Drawing,System.Windows.Forms

结果截图：