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   源码介绍

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using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;
namespace Image
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.BackColor = System.Drawing.SystemColors.Window;
			this.ClientSize = new System.Drawing.Size(352, 278);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;
			this.MaximizeBox = false;
			this.Name = "Form1";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "演示路径渐变画刷";
			this.Paint  = new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
		{//绘制路径渐变图形
			Graphics gp=e.Graphics;
			//绘制第一个图形
			//设置第一个图形的点坐标数组
			Point []myPtsA={new Point(10,10),new Point(90,10),new Point(170,10),new Point(170,50),
				new Point(170,90),new Point(90,90),	new Point(10,90),new Point(10,50)};
			//设置第一个图形的颜色数组
			Color []myColsA = { Color.White, Color.Black,Color.White, Color.Black,
				Color.White,Color.Black,Color.White,Color.Black};
			PathGradientBrush myPGBrushA=new PathGradientBrush(myPtsA);
			myPGBrushA.SurroundColors=myColsA;
			gp.FillRectangle(myPGBrushA,10,10,160,80);
			//绘制第二个图形
			//设置第二个图形的点坐标数组
	        Point []myPtsB={new Point(180,10),new Point(260,10),new Point(340,10),new Point(340,50),
		        new Point(340,90),new Point(260,90),new Point(180,90),new Point(180,50)};
			//设置第二个图形的颜色数组
	        Color  []myColsB = {Color.Green,Color.Blue, Color.Green, Color.Blue,
		        Color.Green, Color.Blue, Color.Green,Color.Blue,};
		    PathGradientBrush myPGBrushB=new PathGradientBrush(myPtsB);
	        myPGBrushB.SurroundColors=myColsB;
	        myPGBrushB.CenterColor=Color.Yellow;
	        gp.FillRectangle(myPGBrushB,180,10,340,80);
			//绘制第三个图形
			//设置第三个图形的点坐标数组
			Point []myPtsC ={new Point(90, 100),new Point(115,165),new Point(170,170),
	            new Point(125,210),new Point(140,270),new Point(90,235),new Point(40,270),
	            new Point(55,210), new Point(10,170), new Point(65,165)};
			GraphicsPath myPathC=new GraphicsPath();
			myPathC.AddLines(myPtsC);
			PathGradientBrush myPGBrushC=new PathGradientBrush(myPathC);
			myPGBrushC.CenterColor=Color.Yellow;
			//设置第三个图形的颜色数组
			Color []myColorsC = {Color.Red,Color.Yellow,Color.Red,Color.Yellow,
	              Color.Red,	Color.Yellow,Color.Red, Color.Yellow,Color.Red,Color.Yellow};			
	        myPGBrushC.SurroundColors=myColorsC;
			gp.FillPath(myPGBrushC, myPathC);
			//绘制第四个图形
			//设置第四个图形的点坐标数组
			Point []myPtsD ={new Point(180, 170),new Point(240,100),new Point(340,100),
			     new Point(340,200),new Point(280,270),new Point(180,270),	};
			GraphicsPath myPathD=new GraphicsPath();
		    myPathD.AddLines(myPtsD);
			PathGradientBrush myPGBrushD=new PathGradientBrush(myPathD);
			myPGBrushD.CenterPoint=new Point(280,170);
	        myPGBrushD.CenterColor=Color.White;
			//设置第四个图形的颜色数组
			Color []myColorsD = {Color.Cyan,Color.Blue,Color.Cyan,
	              Color.Green,Color.Cyan,Color.LightGreen	};
	        myPGBrushD.SurroundColors=myColorsD;			
			gp.FillPath(myPGBrushD, myPathD);		
		}
	}
}