C#—图形图像编程基础
/*
* 绘制要求的线；
*/
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;
using System.Drawing.Drawing2D;
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
Pen p = new Pen(Color.CadetBlue, 10.5f);
g.DrawString("蓝色，宽度为10.5", this.Font, new SolidBrush(Color.CadetBlue), new PointF(5.0f, 10.0f));
g.DrawLine(p, new Point(110, 10), new PointF(380, 10));
p.Width = 2;
p.Color = Color.Red;
g.DrawString("红色，宽度为2", this.Font, new SolidBrush(Color.Black), 5,25);
g.DrawLine(p, new Point(110, 30), new PointF(380, 30));
p.StartCap = LineCap.Flat;
p.EndCap = LineCap.ArrowAnchor;
p.Width = 9;
g.DrawString("红色箭头线", this.Font, new SolidBrush(Color.Black), 5, 45);
g.DrawLine(p, new Point(110, 50), new PointF(380, 50));
p.DashStyle = DashStyle.Custom;
p.DashPattern = new float[] { 4, 4 };
p.Width = 2;
p.EndCap = LineCap.NoAnchor;
g.DrawString("自定义虚线", this.Font, new SolidBrush(Color.Black), 5, 65);
g.DrawLine(p, new Point(110, 70), new PointF(380, 70));
p.DashStyle = DashStyle.Dot;
g.DrawString("点划线", this.Font, new SolidBrush(Color.Black), 5, 85);
g.DrawLine(p, new Point(110, 90), new Point(380, 90));
}
}
}
运行结果：
/*
* 纹理画刷TextureBrush类应用实例：将一副名为b.png的图像添加到项目中，
* 并设置其“复制到输出目录”属性为“如果较新则复制”；
*/
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;
using System.Drawing.Drawing2D;
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
Bitmap bitmap = new Bitmap(Application.StartupPath + @"\b.png"); //创建Bitmap对象
bitmap = new Bitmap(bitmap, this.ClientRectangle.Size); //将其缩放到当前窗体大小
TextureBrush brush = new TextureBrush(bitmap);
g.FillEllipse(brush, this.ClientRectangle);
g.Dispose();
}
}
}
运行结果：
/*
* 图案画刷HatchBrush类应用。该画刷使用90%的阴影，前景色与背景色的比例为90：100，并使用白色作为前景色，红色作为背景色.
*/
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;
using System.Drawing.Drawing2D;
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
HatchBrush brush = new HatchBrush(HatchStyle.Percent90, Color.White, Color.Red);
g.FillEllipse(brush, new Rectangle(10, 10, 300, 100));
}
}
}
运行结果:
/*
* LinearGradientBrush类创建渐变画刷实例。实现由白色渐变到黑色.
*/
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;
using System.Drawing.Drawing2D;
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
LinearGradientBrush brush1 = new LinearGradientBrush(this.ClientRectangle, Color.White, Color.Black, LinearGradientMode.Vertical);
g.FillRectangle(brush1, this.ClientRectangle);
g.Dispose();
}
}
}
