基于XML的留言本[主要是看怎么读写XML]

这个例题非常十分特别太简单了，后面会有一个比较完整的，包括后台管理，增删改的例题，主要我还有点问题没有弄明白，别说简单就不要，呵呵，要知道没有简单的，以后只是一点问题，难道也要看复杂的那么麻烦吗？最重要的是简单的这个源码都在，不需要下载！

XML代码
 1<?xml version="1.0" standalone="yes"?>
 2<NewDataSet xmlns="http://tempuri.org/db1.xsd">
 3  <user>
 4    <name>天轰穿</name>
 5    <email>thc@Fsd.com</email>
 6    <diqu>四川</diqu>
 7    <concent>哈哈，我还以为是什么呢，原来是这个玩意！</concent>
 8  </user>
 9  <user>
10    <name>田洪川</name>
11    <email>gfd@Fds.com</email>
12    <diqu>四川</diqu>
13    <concent>dsgdsgfdbfdbfcvfdvfdzvfd</concent>
14  </user>
15  <user>
16    <name>黄小梅</name>
17    <email>dsf@fddd.com</email>
18    <diqu>四川</diqu>
19    <concent>反对撒法发是犯得上但是　打出手</concent>
20  </user>
21  <user>
22    <name>test</name>
23    <email>test@qq.com</email>
24    <diqu>广东</diqu>
25    <concent>dsacdscdsacdsacsa</concent>
26  </user>
27</NewDataSet>

后台C#代码
 1using System;
 2using System.Collections;
 3using System.ComponentModel;
 4using System.Data;
 5using System.Drawing;
 6using System.Web;
 7using System.Web.SessionState;
 8using System.Web.UI;
 9using System.Web.UI.WebControls;
10using System.Web.UI.HtmlControls;
11
12namespace XML
13{
14    /**//// <summary>
15    /// book 的摘要说明。
16    /// </summary>
17    public class book : System.Web.UI.Page
18    {
19        protected System.Web.UI.WebControls.TextBox tbname;
20        protected System.Web.UI.WebControls.TextBox tbemail;
21        protected System.Web.UI.WebControls.TextBox tbconcent;
22        protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
23        protected System.Web.UI.WebControls.RegularExpressionValidator RegularExpressionValidator1;
24        protected System.Web.UI.WebControls.DropDownList DropDownList1;
25        protected System.Web.UI.WebControls.DataGrid dg;
26        protected System.Web.UI.WebControls.Button tbn;
27    
28        private void Page_Load(object sender, System.EventArgs e)
29        {
30        fill();
31        }
32
33        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
34        override protected void OnInit(EventArgs e)
35        {
36            //
37            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
38            //
39            InitializeComponent();
40            base.OnInit(e);
41        }
42        
43        /**//// <summary>
44        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
45        /// 此方法的内容。
46        /// </summary>
47        private void InitializeComponent()
48        {    
49            this.tbn.Click += new System.EventHandler(this.tbn_Click);
50            this.Load += new System.EventHandler(this.Page_Load);
51
52        }
53        #endregion
54
55        private void fill()
56        {
57            // 读取ＸＭＬ文件的数据到DataGrid
58            DataSet ds=new DataSet();//声明一个读取器
59            ds.ReadXml(Server.MapPath("\\xml\\xml\\db1.xml"));//找到路径
60            this.dg.DataSource=ds.Tables[0].DefaultView;//指定dg网格的数据源
61            this.dg.DataBind();//绑定
62
63//            这段有问题，如果有那位朋友知道的话，万望赐教，谢谢，我QQ110535808，感激不尽
64//            for(int i=0;i<ds.Tables[0].Rows.Count;i++)
65//            {
66//                string email=ds.Tables[0].Rows[i]["email"].ToString();
67//                System.Web.UI.WebControls.Image img=(System.Web.UI.WebControls.Image)(dg.FindControl("img"));
68//                Response.Write(img);
69//                img.ImageUrl=(Server.MapPath("\\xml\\img\\e.gif"));
70//                img.ToolTip=email;
71//            }
72        }
73        private void tbn_Click(object sender, System.EventArgs e)
74        {//提交留言
75            DataSet ds=new DataSet("newds");//建立一个新的内存库
76            ds.ReadXml(Server.MapPath("\\xml\\xml\\db1.xml"));//读取ＸＭＬ文件
77            DataRow dr=ds.Tables[0].NewRow();//给各行赋值
78            dr["name"]=this.tbname.Text.ToString();
79            dr["email"]=this.tbemail.Text.ToString();
80            dr["diqu"]=this.DropDownList1.SelectedValue.ToString();
81            dr["concent"]=this.tbconcent.Text.ToString();
82            ds.Tables[0].Rows.Add(dr);//给内存表中增加一行数据
83            //写进文件
84            ds.WriteXml(Server.MapPath("\\xml\\xml\\db1.xml"));//写进文件,关键
85            fill();    //重新绑定
86        }
87    }
88}
89

前台HTM代码
 1<%@ Page language="c#" Codebehind="book.aspx.cs" AutoEventWireup="false" Inherits="XML.book" %>
 2<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
 3<HTML>
 4    <HEAD>
 5        <title>book</title>
 6        <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
 7        <meta name="CODE_LANGUAGE" Content="C#">
 8        <meta name="vs_defaultClientScript" content="JavaScript">
 9        <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
10    </HEAD>
11    <body MS_POSITIONING="GridLayout">
12        <form id="Form1" method="post" runat="server">
13            <FONT face="宋体">
14                <TABLE id="Table1" style="Z-INDEX: 101; LEFT: 8px; WIDTH: 608px; POSITION: absolute; TOP: 32px; HEIGHT: 352px"
15                    cellSpacing="0" borderColorDark="#99ff00" cellPadding="0" width="608" border="1">
16                    <TR>
17                        <TD style="HEIGHT: 38px" align="center" bgColor="#99ff00"><STRONG>基于ＸＭＬ的留言本</STRONG></TD>
18                    </TR>
19                    <TR>
20                        <TD>
21                            <TABLE id="Table2" style="WIDTH: 784px; HEIGHT: 260px" cellSpacing="0" cellPadding="0"
22                                width="784" border="1">
23                                <TR>
24                                    <TD style="HEIGHT: 38px">姓名：</TD>
25                                    <TD style="HEIGHT: 38px">
26                                        <asp:TextBox id="tbname" runat="server"></asp:TextBox>
27                                        <asp:RequiredFieldValidator id="RequiredFieldValidator1" runat="server" ErrorMessage="*" ControlToValidate="tbname"></asp:RequiredFieldValidator></TD>
28                                </TR>
29                                <TR>
30                                    <TD style="HEIGHT: 41px">邮件：</TD>
31                                    <TD style="HEIGHT: 41px">
32                                        <asp:TextBox id="tbemail" runat="server"></asp:TextBox>
33                                        <asp:RegularExpressionValidator id="RegularExpressionValidator1" runat="server" ErrorMessage="错误的格式" ControlToValidate="tbemail"
34                                            ValidationExpression="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator></TD>
35                                </TR>
36                                <TR>
37                                    <TD style="HEIGHT: 43px">地区：</TD>
38                                    <TD style="HEIGHT: 43px">
39                                        <asp:DropDownList id="DropDownList1" runat="server">
40                                            <asp:ListItem Value="四川">四川</asp:ListItem>
41                                            <asp:ListItem Value="广东">广东</asp:ListItem>
42                                            <asp:ListItem Value="天津">天津</asp:ListItem>
43                                            <asp:ListItem Value="黑龙江">黑龙江</asp:ListItem>
44                                            <asp:ListItem Value="蒙古">蒙古</asp:ListItem>
45                                        </asp:DropDownList></TD>
46                                </TR>
47                                <TR>
48                                    <TD>留言内容：</TD>
49                                    <TD>
50                                        <asp:TextBox id="tbconcent" runat="server" TextMode="MultiLine" Height="83px" Width="341px"></asp:TextBox></TD>
51                                </TR>
52                                <TR>
53                                    <TD></TD>
54                                    <TD>
55                                        <asp:Button id="tbn" runat="server" Text="提交"></asp:Button></TD>
56                                </TR>
57                            </TABLE>
58                        </TD>
59                    </TR>
60                    <TR>
61                        <TD>
62                            <asp:DataGrid id="dg" runat="server" Width="784px" BorderColor="#CC9966" BorderStyle="None" BorderWidth="1px"
63                                BackColor="White" CellPadding="4" AutoGenerateColumns="False">
64                                <SelectedItemStyle Font-Bold="True" ForeColor="#663399" BackColor="#FFCC66"></SelectedItemStyle>
65                                <ItemStyle ForeColor="#330099" BackColor="White"></ItemStyle>
66                                <HeaderStyle Font-Bold="True" ForeColor="#FFFFCC" BackColor="#990000"></HeaderStyle>
67                                <FooterStyle ForeColor="#330099" BackColor="#FFFFCC"></FooterStyle>
68                                <Columns>
69                                    <asp:BoundColumn DataField="name" HeaderText="用户姓名"></asp:BoundColumn>
70                                    <asp:BoundColumn DataField="email" HeaderText="邮件"></asp:BoundColumn>
71                                    <asp:BoundColumn DataField="diqu" HeaderText="城市"></asp:BoundColumn>
72                                    <asp:BoundColumn DataField="concent" HeaderText="内容"></asp:BoundColumn>
73                                    <asp:TemplateColumn HeaderText="修改后邮件">
74                                        <ItemTemplate>
75                                            <asp:Image id="img" runat="server"></asp:Image>
76                                        </ItemTemplate>
77                                    </asp:TemplateColumn>
78                                </Columns>
79                                <PagerStyle HorizontalAlign="Center" ForeColor="#330099" BackColor="#FFFFCC"></PagerStyle>
80                            </asp:DataGrid></TD>
81                    </TR>
82                </TABLE>
83            </FONT>
84        </form>
85    </body>
86</HTML>
87