asp.net实现C#绘制太极图的方法

本文实例讲述了asp.net实现C#绘制太极图的方法。分享给大家供大家参考。具体如下:

成品图如下所示:

html页面:

注意设置:

ContentType="Image/Jpeg"

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="TaiJiTu.aspx.cs" Inherits="TaiJiTu" ContentType="Image/Jpeg" %> 

<!DOCTYPE html>  

<html xmlns="http://www.w3.org/1999/xhtml">  

<head runat="server">  

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>  

    <title></title>  

</head>  

<body>  

    <form id="form1" runat="server">  

    <div>  

    </div>  

    </form>  

</body>  

</html>

后台代码:

using System;  

using System.Drawing;  

using System.Drawing.Drawing2D;  

using System.Drawing.Imaging;  

  

public partial class TaiJiTu : System.Web.UI.Page  

{  

    private Encoder myEncoder;  

    private EncoderParameter myEncoderParameter;  

    private EncoderParameters myEncoderParameters;  

    protected void Page_Load(object sender, EventArgs e)  

    {  

        int imgWidth = 400;                 //图象尺寸  

        int eyeRadius = imgWidth / 20;      //鱼眼半径  

        int headDiameter = imgWidth / 2;    //鱼头直径  

  

        Bitmap image = new Bitmap(imgWidth, imgWidth);  

        image.SetResolution(300, 300);  

  

        Graphics graphics = Graphics.FromImage(image);  

  

        //设置图像质量  

        graphics.CompositingQuality = CompositingQuality.HighQuality;  

        graphics.SmoothingMode = SmoothingMode.AntiAlias;  

        graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;

        //底色填充为白色          Brush white = new SolidBrush(Color.White);          graphics.FillRectangle(white, new Rectangle(0, 0, imgWidth, imgWidth));

        Brush blue = new SolidBrush(Color.Blue);//定义蓝色笔刷          Brush red = new SolidBrush(Color.Red);//定义红色笔刷 

        //整个圆形填充蓝色          graphics.FillPie(blue, 0, 0, imgWidth, imgWidth, 0, 360);            //定义右边的路径(红色部分)          GraphicsPath redPath = new GraphicsPath();//初始化路径          redPath.AddArc(0, 0, imgWidth, imgWidth, 0, -180);          redPath.AddArc(0, headDiameter / 2, headDiameter, headDiameter, 0, -180);          redPath.AddArc(headDiameter, headDiameter / 2, headDiameter, headDiameter, 0, 180);         //填充右边部分          graphics.FillPath(red, redPath);         //填充红色眼睛          graphics.FillPie(red, new Rectangle(headDiameter / 2 - eyeRadius, headDiameter - eyeRadius, eyeRadius * 2, eyeRadius * 2), 0, 360);         //填充蓝色眼睛          graphics.FillPie(blue, new Rectangle(headDiameter + headDiameter / 2 - eyeRadius, headDiameter - eyeRadius, eyeRadius * 2, eyeRadius * 2), 0, 360); 

        graphics.Dispose(); 

        //写入到Response输出流中去,普通质量          //image.Save(Response.OutputStream, ImageFormat.Jpeg); 

        //修改图片保存质量          ImageCodecInfo myImageCodecInfo = GetEncoder(ImageFormat.Jpeg);          myEncoder = Encoder.Quality;          myEncoderParameters = new EncoderParameters(1);          //图片质量等级          myEncoderParameter = new EncoderParameter(myEncoder, 100L);          myEncoderParameters.Param[0] = myEncoderParameter;            //使用指定参数输出          image.Save(Response.OutputStream, myImageCodecInfo, myEncoderParameters);      }      private static ImageCodecInfo GetEncoder(ImageFormat format)      {          ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();            foreach (ImageCodecInfo codec in codecs)          {              if (codec.FormatID == format.Guid)              {                  return codec;              }          }          return null;      }  }

希望本文所述对大家的C#程序设计有所帮助。

声明:本文内容来源于网络,版权归原作者所有,内容由互联网用户自发贡献自行上传,本网站不拥有所有权,未作人工编辑处理,也不承担相关法律责任。如果您发现有涉嫌版权的内容,欢迎发送邮件至:notice#cainiaojc.com(发邮件时,请将#更换为@)进行举报,并提供相关证据,一经查实,本站将立刻删除涉嫌侵权内容。