asp.net GDI+绘制多个矩形

Posted 2020-08-22 清风白水

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Web;
 5 using System.Web.UI;
 6 using System.Web.UI.WebControls;
 7 using System.Drawing;
 8 using System.Drawing.Drawing2D;
 9 
10 public partial class _Default : System.Web.UI.Page
11 {
12     protected void Page_Load(object sender, EventArgs e)
13     {
14         Bitmap bitmap = new Bitmap(360, 260);
15         Graphics graphics = Graphics.FromImage(bitmap);
16         graphics.Clear(Color.White);
17         Pen pen = new Pen(Color.Blue, 2);
18         Rectangle[] rects = { new Rectangle(10, 10, 20, 20), new Rectangle(100, 200, 250, 50), new Rectangle(300, 10, 50, 100) };
19         graphics.DrawRectangles(pen, rects);
20         System.IO.MemoryStream ms = new System.IO.MemoryStream();
21         bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
22         Response.ClearContent();
23         Response.ContentType = "image/Jpeg";
24         Response.BinaryWrite(ms.ToArray());
25     }
26 }