xml保存图片和读取图片（三）

5.ImageDisplay.aspx

<% @ Page language = " c# "  Codebehind = " ImageDisplay.aspx.cs "  AutoEventWireup = " false "  Inherits = " WebForm_Question2.ImageDisplay "   %>
<! DOCTYPE HTML PUBLIC  " -//W3C//DTD HTML 4.0 Transitional//EN "   >
< HTML >
     < HEAD >
         < title > ImageDisplay </ title >
         < meta name = " GENERATOR "  Content = " Microsoft Visual Studio .NET 7.1 " >
         < meta name = " CODE_LANGUAGE "  Content = " C# " >
         < meta name = " vs_defaultClientScript "  content = " JavaScript " >
         < meta name = " vs_targetSchema "  content = " http://schemas.microsoft.com/intellisense/ie5 " >
     </ HEAD >
     < body MS_POSITIONING = " GridLayout " >
         < form id = " Form1 "  method = " post "  runat = " server " >
             < FONT face = " 宋体 " ></ FONT >
         </ form >
     </ body >
</ HTML >

6.ImageDisplay.aspx.cs

using  System;
using  System.Collections;
using  System.ComponentModel;
using  System.Data;
using  System.Drawing;
using  System.Web;
using  System.Web.SessionState;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.HtmlControls;
using  System.Xml;
using  System.Xml.XPath;
using  System.IO;

namespace  WebForm_Question2
{
    /**//// <summary>
    /// ImageDisplay 的摘要说明。
    /// </summary>
    public class ImageDisplay : System.Web.UI.Page
    {
        private void Page_Load(object sender, System.EventArgs e)
        {
            // 在此处放置用户代码以初始化页面
          
                string imageID=Request.QueryString["imageID"].ToString();
                string fileName = Server.MapPath(".\\ImageList.xml");           
                XmlDocument doc = new XmlDocument();
                doc.Load(fileName);
                XmlNodeList nodelist = doc.SelectSingleNode("//image[imageID='"+imageID+"']").ChildNodes;
                if(nodelist!=null)
                {
                    string imageData =nodelist.Item(4).InnerText;
                    int imageSize = int.Parse(nodelist.Item(3).InnerText);
                    Response.OutputStream.Write(Convert.FromBase64String(imageData),0,imageSize); 
                    Response.End();
                }
                
        
        }

        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {    
            this.Load += new System.EventHandler(this.Page_Load);
        }
        #endregion
    }
}