随机图片
aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="FreshImg.aspx.cs" Inherits="FreshImg" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>随机图像</title> <!--每2秒刷新--> <meta http-equiv="refresh" content="2" /></head><body> <form id="form1" runat="server" > <div> <img ID="DTImg" runat="server" /> </div> </form></body></html>aspx.csusing System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Drawing;public partial class FreshImg : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{ DTImg.Src = CreateImage();
} public string CreateImage() { //创建Graphics对象 Bitmap backimg = new Bitmap(800, 600); Graphics g = Graphics.FromImage(backimg); //通过产生随机数来确定随机位置 int x = 0, y = 0; Random r = new Random(); g.Clear(Color.White); //显示各图标 Bitmap dyimg = new Bitmap(Server.MapPath("sampledi.gif")); for (int i = 0; i < 5; i++) g.DrawImage(dyimg, x + r.Next(300), y + r.Next(300)); //存储页面图像 string imgpath = Server.MapPath("sample.gif"); backimg.Save(imgpath, System.Drawing.Imaging.ImageFormat.Gif); return imgpath; }
}