使用XmlDocument类完成对XML的查、删、添、改
前台HTML代码
1
<%
@ Page language="c#" Codebehind="xdoc.aspx.cs" AutoEventWireup="false" Inherits="XML.xdoc" %>2
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >3
<HTML>4
<HEAD>5
<title>xdoc</title>6
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">7
<meta content="C#" name="CODE_LANGUAGE">8
<meta content="JavaScript" name="vs_defaultClientScript">9
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">10
</HEAD>11
<body MS_POSITIONING="GridLayout">12
<form id="Form1" method="post" runat="server">13
<FONT face="宋体">14
<asp:datagrid id="dg" style="Z-INDEX: 101; LEFT: 48px; POSITION: absolute; TOP: 56px" runat="server"15
ForeColor="Black" BorderStyle="None" BorderWidth="1px" BorderColor="#DEDFDE" BackColor="White"16
CellPadding="4" GridLines="Vertical" AutoGenerateColumns="False" Width="432px">17
<SelectedItemStyle Font-Bold="True" ForeColor="White" BackColor="#CE5D5A"></SelectedItemStyle>18
<AlternatingItemStyle BackColor="White"></AlternatingItemStyle>19
<ItemStyle BackColor="#F7F7DE"></ItemStyle>20
<HeaderStyle Font-Bold="True" ForeColor="White" BackColor="#6B696B"></HeaderStyle>21
<FooterStyle BackColor="#CCCC99"></FooterStyle>22
<Columns>23
<asp:BoundColumn DataField="name" HeaderText="名字"></asp:BoundColumn>24
<asp:BoundColumn DataField="City" HeaderText="城市"></asp:BoundColumn>25
<asp:BoundColumn DataField="Email" HeaderText="邮件地址"></asp:BoundColumn>26
<asp:BoundColumn DataField="Time" HeaderText="时间"></asp:BoundColumn>27
</Columns>28
<PagerStyle HorizontalAlign="Right" ForeColor="Black" BackColor="#F7F7DE" Mode="NumericPages"></PagerStyle>29
</asp:datagrid><asp:label id="Label1" style="Z-INDEX: 102; LEFT: 112px; POSITION: absolute; TOP: 8px" runat="server"30
Width="336px" BorderWidth="2px" BorderStyle="Ridge" Font-Size="X-Large" Font-Bold="True" ForeColor="Red">XmlDocument类的挖掘</asp:label><asp:dropdownlist id="ddl" style="Z-INDEX: 103; LEFT: 128px; POSITION: absolute; TOP: 280px" runat="server"></asp:dropdownlist><asp:label id="Label2" style="Z-INDEX: 104; LEFT: 64px; POSITION: absolute; TOP: 280px" runat="server">姓名：</asp:label><asp:button id="Button1" style="Z-INDEX: 105; LEFT: 64px; POSITION: absolute; TOP: 328px" runat="server"31
Width="64px" Text="查询"></asp:button><asp:label id="Label3" style="Z-INDEX: 106; LEFT: 64px; POSITION: absolute; TOP: 384px" runat="server">邮件地址：</asp:label><asp:button id="Button2" style="Z-INDEX: 107; LEFT: 152px; POSITION: absolute; TOP: 328px" runat="server"32
Width="64px" Text="删除"></asp:button><asp:button id="Button3" style="Z-INDEX: 108; LEFT: 432px; POSITION: absolute; TOP: 280px" runat="server"33
Width="56px" Text="添加" Height="80px"></asp:button><asp:textbox id="tbn" style="Z-INDEX: 109; LEFT: 152px; POSITION: absolute; TOP: 384px" runat="server"34
Width="328px"></asp:textbox><asp:button id="Button4" style="Z-INDEX: 110; LEFT: 64px; POSITION: absolute; TOP: 416px" runat="server"35
Width="424px" Text="修改邮件地址"></asp:button>36
<asp:TextBox id="tbna" style="Z-INDEX: 111; LEFT: 312px; POSITION: absolute; TOP: 280px" runat="server"37
Width="104px"></asp:TextBox>38
<asp:TextBox id="tbc" style="Z-INDEX: 112; LEFT: 312px; POSITION: absolute; TOP: 312px" runat="server"39
Width="104px" Height="24px"></asp:TextBox>40
<asp:TextBox id="tbe" style="Z-INDEX: 113; LEFT: 312px; POSITION: absolute; TOP: 344px" runat="server"41
Width="104px" Height="24px"></asp:TextBox>42
<asp:Label id="Label4" style="Z-INDEX: 114; LEFT: 264px; POSITION: absolute; TOP: 280px" runat="server">姓名：</asp:Label>43
<asp:Label id="Label5" style="Z-INDEX: 115; LEFT: 264px; POSITION: absolute; TOP: 312px" runat="server">城市：</asp:Label>44
<asp:Label id="Label6" style="Z-INDEX: 116; LEFT: 264px; POSITION: absolute; TOP: 344px" runat="server">Email：</asp:Label></FONT></form>45
</body>46
</HTML>47
后台C#代码
1
using System;2
using System.Collections;3
using System.ComponentModel;4
using System.Data;5
using System.Drawing;6
using System.Web;7
using System.Web.SessionState;8
using System.Web.UI;9
using System.Web.UI.WebControls;10
using System.Web.UI.HtmlControls;11
//新引入两个命名空间12
using System.Xml;13
using System.Xml.XPath;14
15
namespace XML16
{17
/**//// <summary>18
/// xdoc 的摘要说明。19
/// </summary>20
public class xdoc : System.Web.UI.Page21
{22
protected System.Web.UI.WebControls.Label Label1;23
protected System.Web.UI.WebControls.Label Label2;24
protected System.Web.UI.WebControls.Button Button1;25
protected System.Web.UI.WebControls.Label Label3;26
protected System.Web.UI.WebControls.Button Button2;27
protected System.Web.UI.WebControls.Button Button3;28
protected System.Web.UI.WebControls.DataGrid dg;29
protected System.Web.UI.WebControls.DropDownList ddl;30
protected System.Web.UI.WebControls.TextBox tbn;31
protected System.Web.UI.WebControls.Label Label4;32
protected System.Web.UI.WebControls.Label Label5;33
protected System.Web.UI.WebControls.Label Label6;34
protected System.Web.UI.WebControls.TextBox tbna;35
protected System.Web.UI.WebControls.TextBox tbc;36
protected System.Web.UI.WebControls.TextBox tbe;37
protected System.Web.UI.WebControls.Button Button4;38
39
private void Page_Load(object sender, System.EventArgs e)40
{//看动作名字就知道了是载入了41
if(!Page.IsPostBack)42
{43
fill();44
}45
}46
47
Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码48
override protected void OnInit(EventArgs e)49
{50
//51
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。52
//53
InitializeComponent();54
base.OnInit(e);55
}56
57
/**//// <summary>58
/// 设计器支持所需的方法 - 不要使用代码编辑器修改59
/// 此方法的内容。60
/// </summary>61
private void InitializeComponent()62
{ 63
this.Button1.Click += new System.EventHandler(this.Button1_Click);64
this.Button2.Click += new System.EventHandler(this.Button2_Click);65
this.Button3.Click += new System.EventHandler(this.Button3_Click);66
this.Button4.Click += new System.EventHandler(this.Button4_Click);67
this.Load += new System.EventHandler(this.Page_Load);68
69
}70
#endregion71
72
private void fill()73
{//绑定方法74
DataSet ds=new DataSet();75
ds.ReadXml(Server.MapPath("\\xml\\xml\\doc.xml"));76
dg.DataSource=ds.Tables[0];77
dg.DataBind();78
XmlDocument xd=new XmlDocument();79
xd.Load(Server.MapPath("\\xml\\xml\\doc.xml"));80
System.Xml.XmlNodeList xnl=xd.GetElementsByTagName("Name");81
ddl.Items.Clear();82
for(int i=0;i<xnl.Count;i++)83
{84
ddl.Items.Add(xnl[i].InnerText);85
}86
}87
88
private void Button1_Click(object sender, System.EventArgs e)89
{//查询动作90
XmlDocument xd=new XmlDocument();91
xd.Load(Server.MapPath("\\xml\\xml\\doc.xml"));92
tbn.Text=xd.SelectSingleNode("//User[Name='"+ddl.SelectedItem.Text+"']").ChildNodes.Item(2).InnerText.ToString();93
94
}95
96
private void Button2_Click(object sender, System.EventArgs e)97
{//删除动作98
XmlDocument xdoc=new XmlDocument();99
xdoc.Load(Server.MapPath("\\xml\\xml\\doc.xml"));100
XmlNodeList xnl=xdoc.SelectSingleNode("dbGuest").ChildNodes;101
102
foreach(XmlNode xn in xnl)103
{104
XmlElement xe=(XmlElement)xn;105
XmlNodeList node=xe.GetElementsByTagName("Name");//查找他的Name行106
if(node.Count>0)107
{108
if(node[0].InnerText==ddl.SelectedItem.Text)//如果当前节点的名字和下拉列表传来的一样，就删除109
{110
xe.RemoveAll();//删除节点的所有指定属性和子集，但是不删除默认属性,我很郁闷，不知道怎么连属性一起删除，如果有朋友知道，请一定告诉我下，谢谢了！111
112
}113
break;114
}115
116
}117
xdoc.Save(Server.MapPath("\\xml\\xml\\doc.xml"));118
fill();119
}120
121
private void Button3_Click(object sender, System.EventArgs e)122
{//添加动作123
string name=this.tbna.Text.ToString();124
string city=this.tbc.Text.ToString();125
string email=this.tbe.Text.ToString();126
127
XmlDocument xd=new XmlDocument();128
xd.Load(Server.MapPath("\\xml\\xml\\doc.xml"));129
//查找dbGuest节点130
XmlNode xn=xd.SelectSingleNode("dbGuest");131
//创建user节点132
XmlElement xe_u=xd.CreateElement("User");133
//创建一个name元素134
XmlElement xe_a1=xd.CreateElement("Name");135
xe_a1.InnerText=name;//设置该元素的值136
xe_u.AppendChild(xe_a1);//把刚才创建的元素插入name节点里面去137
XmlElement xe_a2=xd.CreateElement("City");138
xe_a2.InnerText=city;139
xe_u.AppendChild(xe_a2);140
XmlElement xe_a3=xd.CreateElement("Email");141
xe_a3.InnerText=email;142
xe_u.AppendChild(xe_a3);143
XmlElement xe_a4=xd.CreateElement("Time");144
xe_a4.InnerText=(DateTime.Now).ToString();145
xe_u.AppendChild(xe_a4);146
//将User节点插入到dbGuest147
xn.AppendChild(xe_u);148
//保存XML文件149
xd.Save(Server.MapPath("\\xml\\xml\\doc.xml"));150
fill();151
}152
153
private void Button4_Click(object sender, System.EventArgs e)154
{//修改邮件地址动作155
XmlDocument xd=new XmlDocument();156
xd.Load(Server.MapPath("\\xml\\xml\\doc.xml"));//载入XML文件157
XmlNodeList xnl=xd.SelectSingleNode("dbGuest").ChildNodes;//获取dbGuest节点的全部子节点158
foreach(XmlNode xn in xnl)//迭代所有子节点159
{160
XmlElement xe=(XmlElement)xn;//将迭代到的子节点转换成XmlElement类型161
XmlNodeList xnl2=xe.GetElementsByTagName("Name");//返回所有Name列的数据162
if(xnl2.Count>0)//如果大于零就表示有撒，163
{164
if(xnl2[0].InnerText==ddl.SelectedItem.Text)//如果该列有和被下拉列表中返回的值一样的数据的话165
{166
XmlNodeList xnl3=xe.ChildNodes;//再获取下面所有的子节点167
foreach(XmlNode xn1 in xnl3)//再迭代子集168
{169
XmlElement xe2=(XmlElement)xn1;//转换类型170
if(xe2.Name=="Email")//如果节点名字是Email的话171
{172
xe2.InnerText=tbn.Text;//该节点的值就替换成文本框中的173
break;174
}175
}176
break;177
}178
}179
}180
xd.Save(Server.MapPath("\\xml\\xml\\doc.xml"));181
fill();182
}183
}184
}185
XML文件代码
1
<?xml version="1.0" encoding="utf-8"?>2
<dbGuest>3
<User>4
<Name>天轰穿</Name>5
<City>江油</City>6
<Email>[email protected]</Email>7
<Time>2006-5-6 16:10:56</Time>8
</User>9
<User>10
<Name>田洪川</Name>11
<City>绵阳</City>12
<Email>[email protected]</Email>13
<Time>2006-5-6 16:06:51</Time>14
</User>15
<User>16
<Name>黄小梅</Name>17
<City>南充</City>18
<Email>[email protected]</Email>19
<Time>2006-5-6 16:07:15</Time>20
</User>21
</dbGuest>