asp.net C#繪製太極圖_

asp.net C#繪製太極圖__.net

最後更新：2018-07-26 來源：互聯網

上載者：User

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成品圖：

html頁面：

注意設定

 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>

後台代碼：

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;                 //圖象尺寸        int eyeRadius = imgWidth / 20;      //魚眼半徑        int headDiameter = imgWidth / 2;    //魚頭直徑        Bitmap image = new Bitmap(imgWidth, imgWidth);        image.SetResolution(300, 300);        Graphics graphics = Graphics.FromImage(image);        //設定映像品質        graphics.CompositingQuality = CompositingQuality.HighQuality;        graphics.SmoothingMode = SmoothingMode.AntiAlias;        graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;        //底色填充為白色        Brush white = new SolidBrush(Color.White);        graphics.FillRectangle(white, new Rectangle(0, 0, imgWidth, imgWidth));        Brush blue = new SolidBrush(Color.Blue);//定義藍色筆刷        Brush red = new SolidBrush(Color.Red);//定義紅色筆刷        //整個圓形填充藍色        graphics.FillPie(blue, 0, 0, imgWidth, imgWidth, 0, 360);        //定義右邊的路徑（紅色部分）        GraphicsPath redPath = new GraphicsPath();//初始化路徑        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);        //填充右邊部分        graphics.FillPath(red, redPath);        //填充紅色眼睛        graphics.FillPie(red, new Rectangle(headDiameter / 2 - eyeRadius, headDiameter - eyeRadius, eyeRadius * 2, eyeRadius * 2), 0, 360);        //填充藍色眼睛        graphics.FillPie(blue, new Rectangle(headDiameter + headDiameter / 2 - eyeRadius, headDiameter - eyeRadius, eyeRadius * 2, eyeRadius * 2), 0, 360);                graphics.Dispose();        //寫入到Response輸出資料流中去，普通品質        //image.Save(Response.OutputStream, ImageFormat.Jpeg);        //修改圖片儲存品質        ImageCodecInfo myImageCodecInfo = GetEncoder(ImageFormat.Jpeg);        myEncoder = Encoder.Quality;        myEncoderParameters = new EncoderParameters(1);        //圖片品質等級        myEncoderParameter = new EncoderParameter(myEncoder, 100L);        myEncoderParameters.Param[0] = myEncoderParameter;        //使用指定參數輸出        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;    }}

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