ASP.NET 绘制动态曲线图.
C# code:
using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Drawing;
using System.Drawing.Text;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
public partial class _Default : System.Web.UI.Page
{
int y = 300;
int t = 0;
protected void Page_Load(object sender, EventArgs e)
{
Timer1.Enabled = true;
Timer1.Tick += new EventHandler<EventArgs>(Timer1_Tick);
Timer1.Interval = 1000;
}
protected void Timer1_Tick(object sender, EventArgs e)
{
Random rnd = new Random();
Bitmap newBitmap = new Bitmap(800, 400);
Graphics g = Graphics.fromImage(newBitmap);
RectangleF Rf = new RectangleF(0, 0, 800, 400);
g.FillRectangle(new SolidBrush(Color.White), Rf);
g.DrawLine(new Pen(Color.Black), 20, 320, 750, 320);
g.DrawLine(new Pen(Color.Black), 20, 10, 20, 320);
for (int x = 20; x <= 750; x++)
{
t = rnd.Next(-20, 20);
g.DrawLine(new Pen(Color.Red), x++, y, x + 1, y += t);
}
Response.ContentType = "image/jpeg";
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参考
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if (files.Count <= 1)
{
......
