xml保存图片和读取图片（一）

以下是我做过的一个利用xml保存图片和读取图片的小项目，项目名称：WebForm_Question2:

主页面:index.aspx
图片列表:ImageList.aspx
显示图片:ImagDisplay.aspx
xml文件:ImageList.xml

XML文件

1.:index.aspx页面

<%@ Page language="c#" Codebehind="index.aspx.cs" AutoEventWireup="false" Inherits="WebForm_Question2.index" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

<HTML>

<HEAD>

<title>index</title>

</HEAD>

<TABLE id="Table1" style="Z-INDEX: 100; LEFT: 112px; WIDTH: 744px; POSITION: absolute; TOP: 48px; HEIGHT: 324px"

cellSpacing="1" cellPadding="1" width="744" border="1">

<TR>

<asp:Label id="Label1" runat="server" Width="80px" ForeColor="#000040" Font-Bold="True" Font-Size="Larger">主页面</asp:Label></FONT></TD>

</TR>

<TR>

<TD style="HEIGHT: 32px"><INPUT id="upImage" style="WIDTH: 328px; HEIGHT: 22px" type="file" size="35" name="File1"

runat="server">   

<asp:Button id="btnUp_img" runat="server" Text="显示图片信息"></asp:Button></TD>

</TR>

<TR>

<asp:Image id="ImageSmall" runat="server"></asp:Image></TD>

</TR>

<TR>

<asp:Label id="Lab_imgpath" runat="server"></asp:Label></TD>

</TR>

<TR>

<asp:Label id="Lab_size" runat="server"></asp:Label></TD>

</TR>

<TR>

<TD>

<asp:TextBox id="Txt_imginfo" runat="server" TextMode="MultiLine" Width="645px" Height="144px"></asp:TextBox></TD>

</TR>

<TR>

<TD>

<asp:Button id="Btn_Add" runat="server" Text="添加图片信息到XML文件"></asp:Button>

<asp:Label id="Lab_message" runat="server" ForeColor="Red" Font-Bold="True"></asp:Label></TD>

</TR>

<TR>

<TD>

<asp:HyperLink id="HyperLink2" runat="server" NavigateUrl="ImageList.aspx">图片列表</asp:HyperLink><FONT face="宋体">                                                             

</FONT>

<asp:HyperLink id="HyperLink1" runat="server" NavigateUrl="ImageList.xml">查看XMl文件</asp:HyperLink></TD>

</TR>

</TABLE>

</form>

</body>

</HTML>

2.index.aspx.cs页面

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.IO;

namespace WebForm_Question2

{

/// <summary>

/// index 的摘要说明。

/// </summary>

public class index : System.Web.UI.Page

{

protected System.Web.UI.WebControls.TextBox Txt_imginfo;

protected System.Web.UI.WebControls.Label Lab_size;

protected System.Web.UI.WebControls.Label Lab_imgpath;

protected System.Web.UI.WebControls.Image ImageSmall;

protected System.Web.UI.WebControls.Button btnUp_img;

protected System.Web.UI.HtmlControls.HtmlInputFile upImage;

protected string imagepath;

protected string imagesize;

protected System.Web.UI.WebControls.Button Btn_Add;

protected System.Web.UI.WebControls.Label Lab_message;

protected System.Web.UI.WebControls.HyperLink HyperLink2;

protected System.Web.UI.WebControls.HyperLink HyperLink1;

protected System.Web.UI.WebControls.Label Label1;

protected System.Web.UI.WebControls.Label Label2;

protected string imagetype;

private void Page_Load(object sender, System.EventArgs e)

{

// 在此处放置用户代码以初始化页面

}

Web 窗体设计器生成的代码

显示图片并读取其路径,大小

添加事件

添加图片信息到自定义的XML文件:ImageList.XML#region 添加图片信息到自定义的XML文件:ImageList.XML

private void OP_Xml()

{

XmlDocument doc = new XmlDocument();

doc.Load(Server.MapPath("ImageList.XML"));

XmlNode root = doc.DocumentElement;

string id =Convert.ToString(Convert.ToInt32(root.LastChild.ChildNodes[0].InnerText)+1);

string path = this.Lab_imgpath.Text.Trim();

string size = this.Lab_size.Text.Trim();

string info = this.Txt_imginfo.Text.Trim();

// 使用文件流构造一个二进制读取器将基元数据读作二进制值

FileStream fs = new FileStream(path,FileMode.Open);

BinaryReader br = new BinaryReader(fs);

byte[] imageBuffer = new byte[br.BaseStream.Length];

br.Read(imageBuffer,0,Convert.ToInt32(br.BaseStream.Length));

string textString = System.Convert.ToBase64String(imageBuffer);

fs.Close();

br.Close();

//创建元素节点

XmlNode image = doc.CreateElement("image");

XmlNode imageid = doc.CreateElement("imageID");

XmlNode imagepath = doc.CreateElement("imagepath");

XmlNode imageinfo = doc.CreateElement("imageinfo");

XmlNode imagesize = doc.CreateElement("imagesize");

XmlNode imagedata = doc.CreateElement("imagedata");

//创建文本节点

XmlNode txt_id = doc.CreateTextNode(id);

XmlNode txt_path = doc.CreateTextNode(path);

XmlNode txt_info = doc.CreateTextNode(info);

XmlNode txt_size = doc.CreateTextNode(size);

XmlNode txt_data = doc.CreateTextNode(textString);

//文本节点附加给元素节点

imageid.AppendChild(txt_id);

imagepath.AppendChild(txt_path);

imageinfo.AppendChild(txt_info);

imagesize.AppendChild(txt_size);

imagedata.AppendChild(txt_data);

//元素节点附加给image节点

image.AppendChild(imageid);

image.AppendChild(imagepath);

image.AppendChild(imageinfo);

image.AppendChild(imagesize);

image.AppendChild(imagedata);

//image节点附加给根节点

root.AppendChild(image);

doc.Save(Server.MapPath("ImageList.XML"));

this.Lab_message.Text = "图片添加成功!";

}

#endregion

}

posted @ 2006-09-18 08:45 青羽阅读(13144) 评论(2) 编辑收藏举报

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