利用asp.net怎么繪制一個太極圖

發(fā)布時間：2021-02-08 17:07:28 來源：億速云閱讀：91 作者：Leah 欄目：開發(fā)技術(shù)

利用asp.net怎么繪制一個太極圖？相信很多沒有經(jīng)驗的人對此束手無策，為此本文總結(jié)了問題出現(xiàn)的原因和解決方法，通過這篇文章希望你能解決這個問題。

代碼如下:

ContentType="Image/Jpeg"

復(fù)制代碼代碼如下:

<%@ 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>

后臺代碼：

復(fù)制代碼代碼如下:

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(shè)置圖像質(zhì)量
        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(lán)色筆刷
Brush red = new SolidBrush(Color.Red);//定義紅色筆刷

        //整個圓形填充藍(lán)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(lán)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輸出流中去，普通質(zhì)量
//image.Save(Response.OutputStream, ImageFormat.Jpeg);

        //修改圖片保存質(zhì)量
        ImageCodecInfo myImageCodecInfo = GetEncoder(ImageFormat.Jpeg);
        myEncoder = Encoder.Quality;
        myEncoderParameters = new EncoderParameters(1);
        //圖片質(zhì)量等級
        myEncoderParameter = new EncoderParameter(myEncoder, 100L);
        myEncoderParameters.Param[0] = myEncoderParameter;

        //使用指定參數(shù)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;
    }
}

看完上述內(nèi)容，你們掌握利用asp.net怎么繪制一個太極圖的方法了嗎？如果還想學(xué)到更多技能或想了解更多相關(guān)內(nèi)容，歡迎關(guān)注億速云行業(yè)資訊頻道，感謝各位的閱讀！

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