绘制椭圆代码:
主要语法:pen对象,确定曲线颜色宽度和样式.

用Graphics类的DrawEllipse方法

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace UseDEllipse

{

public partial class Frm_Main : Form

{

public Frm_Main()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

Graphics graphics = this.CreateGraphics();//创建Graphics对象

Pen myPen = new Pen(Color.DarkOrange, 3);//创建Pen对象

graphics.DrawEllipse(myPen, 55, 20, 100, 50);//绘制椭圆

}

圆弧代码:DrawArc方法中参数如下:
pen对象确定弧线的颜色,宽度,样式.rect :Rectangle结构,定义椭圆的边界.startAngle从x轴到弧线的起始点沿顺时针方向度量的角.

用Graphic类中的DrawArc方法

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace UseDArc

{

public partial class Frm_Main : Form

{

public Frm_Main()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

Graphics ghs = this.CreateGraphics();//实例化Graphics类

Pen myPen = new Pen(Color.DarkRed, 3);//实例化Pen类

Rectangle myRectangle = new Rectangle(50, 20, 100, 60);//定义一个Rectangle结构

ghs.DrawArc(myPen, myRectangle, 180, 180);//绘制圆弧

}

ITPub博客

c#画图(椭圆和弧线)Craphics类

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