No 2 · 使用Response.BinaryWrite方法输出二进制图形

using System;using System.Data;using System.Configuration;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.IO;public partial class _Default : System.Web.UI.Page {    protected void Page_Load(object sender, EventArgs e)    {        //打开图片文件，并存在文件流中        FileStream stream = new FileStream(Server.MapPath(@"~/images/书.jpg"), FileMode.Open);        long FileSize = stream.Length;//获取流的长度        byte[] Buffer = new byte[(int)FileSize];//定义一个二进制数组        stream.Read(Buffer, 0, (int)FileSize);//从流中读取字节块并将该数据写入给定缓冲区中        stream.Close();//关闭流        Response.BinaryWrite(Buffer);//将图片输出在页面上    }}