浅析C#中图形编程

using System;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;

public class LinearGradientbru:Form {
public LinearGradientbru() {
this.Text = "运用LinearGradientBrush示例";
this.Paint += new PaintEventHandler(Fill_Graph);
}


public void Fill_Graph(object sender,PaintEventArgs e) {
Rectangle r = new Rectangle(500, 300, 100, 100);
LinearGradientBrush lb = new LinearGradientBrush(r, Color.Red, Color.Yellow,
LinearGradientMode.BackwardDiagonal);
e.Graphics.FillRectangle(lb, r);
}


public static void Main() {
Application.Run(new LinearGradientbru());
}
}

using System;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;

public class PathGradientbru:Form {
public PathGradientbru() {
this.Text = "运用PathGradientBrush示例";
this.Paint += new PaintEventHandler(Fill_Graph);
}

public void Fill_Graph(object sender,PaintEventArgs e) {
e.Graphics.TextRenderingHint = TextRenderingHint.AntiAliased;
e.Graphics.FillRectangle(backgroundBrush, ClientRectangle);
e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(180, Color.White)), ClientRectangle);

//先设置好一个路径
GraphicsPath path = new GraphicsPath(new Point[] {
new Point(40, 140),
new Point(275, 200),
new Point(105, 225),
new Point(190, 300),
new Point(50, 350),
new Point(20, 180),
}, new byte[] {

(byte)PathPointType.Start,
(byte)PathPointType.Bezier,
(byte)PathPointType.Bezier,
(byte)PathPointType.Bezier,
(byte)PathPointType.Line,
(byte)PathPointType.Line,
});

//创建一把PathGradientBrush

PathGradientBrush pgb = new PathGradientBrush(path);

//设置画刷的周围颜色

pgb.SurroundColors = new Color[] {
　Color.Green,
　Color.Yellow,
　Color.Red,
　Color.Blue,
　Color.Orange,
　Color.White,

};

//用画刷进行填充
e.Graphics.FillPath(pgb, path);
}


public static void Main() {
Application.Run(new PathGradientbru());
}

}

using System;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;

public class Texturedbru:Form {
Brush bgbrush;

public Texturedbru() {

//创建一幅图像以供填充椭圆的背景用
Image bgimage = new Bitmap("dotnet.gif");
bgbrush = new TextureBrush(bgimage);
this.Paint+=new PaintEventHandler(Text_bru);

}

public void Text_bru(object sender,PaintEventArgs e) {
Graphics g = e.Graphics;
g.FillEllipse(bgbrush,50,50,500,300);

}

public static void Main() {
Application.Run(new Texturedbru());
}
}