asp.net(C#) Xml操作(增删改查)练习

发布时间：2020-03-14 12:04:17 所属栏目：Asp教程来源：站长网

导读：web.config配置前后台文件等代码

前台:

复制代码代码如下:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="test_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>C#操作Xml(增删改查)练习</title>
</head>
<body>
<form runat="server">
<div runat="server">
显示Xml文档
</div>
<div>为html控件绑定服务器控件的两个要点:<br />
1.onserverclick="serverMethod"这里只写方法名.<br />
2.后台代码,必须是<br />
protected void XmlAdd(object sender, EventArgs e){}<br />
注意两个参数及保护级.
</div>
<input type="button" value="add" runat="server" onserverclick="XmlAdd" />
<input type="button" value="delete" runat="server" onserverclick="XmlDelete" />
<input type="button" value="update" runat="server" onserverclick="XmlUpdate" />
<input type="button" value="query" runat="server" onserverclick="XmlQuery" />
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="test_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>C#操作Xml(增删改查)练习</title>
</head>
<body>
<form runat="server">
<div runat="server">
显示Xml文档
</div>
<div>为html控件绑定服务器控件的两个要点:<br />
1.onserverclick="serverMethod"这里只写方法名.<br />
2.后台代码,必须是<br />
protected void XmlAdd(object sender, EventArgs e){}<br />
注意两个参数及保护级.
</div>
<input type="button" value="add" runat="server" onserverclick="XmlAdd" />
<input type="button" value="delete" runat="server" onserverclick="XmlDelete" />
<input type="button" value="update" runat="server" onserverclick="XmlUpdate" />
<input type="button" value="query" runat="server" onserverclick="XmlQuery" />
</form>
</body>
</html>

后台:

复制代码代码如下:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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.Xml;
public partial class test_Default : System.Web.UI.Page
{
string xmlFile = System.Configuration.ConfigurationManager.AppSettings["xmlFile"];
XmlDocument XmlDoc = new XmlDocument();
protected void Page_Load(object sender, EventArgs e)
{
Bind();
}
private void Bind()
{
XmlDoc.Load(Server.MapPath("../" + xmlFile));//向上一级
this.showXml.InnerHtml = System.Web.HttpUtility.HtmlEncode(XmlDoc.InnerXml);
}
protected void XmlAdd(object sender, EventArgs e)
{
XmlNode objRootNode = XmlDoc.SelectSingleNode("//Root"); //声明XmlNode对象
XmlElement objChildNode = XmlDoc.CreateElement("Student"); //创建XmlElement对象
objChildNode.SetAttribute("id", "1");
objRootNode.AppendChild(objChildNode);
//
XmlElement objElement = XmlDoc.CreateElement("Name");//???结点和元素的区别?方法都一样.
objElement.InnerText = "tree1";
objChildNode.AppendChild(objElement);
//保存
XmlDoc.Save(Server.MapPath("../" + xmlFile));
}
protected void XmlDelete(object sender, EventArgs e)
{
string Node = "//Root/Student[Name='tree1']";//Xml是严格区分大小写的.
XmlDoc.SelectSingleNode(Node).ParentNode.RemoveChild(XmlDoc.SelectSingleNode(Node));
//保存
XmlDoc.Save(Server.MapPath("../" + xmlFile));
}
protected void XmlUpdate(object sender, EventArgs e)
{
//XmlDoc.SelectSingleNode("//Root/Student[Name='tree1']/Name").InnerText = "tree2";
XmlDoc.SelectSingleNode("//Root/Student[Name='tree1']").Attributes["id"].Value = "001";
//保存
XmlDoc.Save(Server.MapPath("../" + xmlFile));
}
protected void XmlQuery(object sender, EventArgs e)
{
XmlNodeList NodeList = XmlDoc.SelectNodes("//Root/Student");//查询全部的student节点
//循环遍历节点，查询是否存在该节点
for (int i = 0; i < NodeList.Count; i++)
{
Response.Write(NodeList[i].ChildNodes[0].InnerText);
}
//查询单个节点,//表示全部匹配的元素./表示以此为根的子元素.javascript下的查询也是一样.
string XmlPathNode = "//Root/Student[Name='rock']/Photo";
Response.Write(XmlDoc.SelectSingleNode(XmlPathNode).InnerText);
}
}
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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.Xml;
public partial class test_Default : System.Web.UI.Page
{
string xmlFile = System.Configuration.ConfigurationManager.AppSettings["xmlFile"];
XmlDocument XmlDoc = new XmlDocument();
protected void Page_Load(object sender, EventArgs e)
{
Bind();
}
private void Bind()
{
XmlDoc.Load(Server.MapPath("../" + xmlFile));//向上一级
this.showXml.InnerHtml = System.Web.HttpUtility.HtmlEncode(XmlDoc.InnerXml);
}
protected void XmlAdd(object sender, EventArgs e)
{
XmlNode objRootNode = XmlDoc.SelectSingleNode("//Root"); //声明XmlNode对象
XmlElement objChildNode = XmlDoc.CreateElement("Student"); //创建XmlElement对象
objChildNode.SetAttribute("id", "1");
objRootNode.AppendChild(objChildNode);
//
XmlElement objElement = XmlDoc.CreateElement("Name");//???结点和元素的区别?方法都一样.
objElement.InnerText = "tree1";
objChildNode.AppendChild(objElement);
//保存
XmlDoc.Save(Server.MapPath("../" + xmlFile));
}
protected void XmlDelete(object sender, EventArgs e)
{
string Node = "//Root/Student[Name='tree1']";//Xml是严格区分大小写的.
XmlDoc.SelectSingleNode(Node).ParentNode.RemoveChild(XmlDoc.SelectSingleNode(Node));
//保存
XmlDoc.Save(Server.MapPath("../" + xmlFile));
}
protected void XmlUpdate(object sender, EventArgs e)
{
//XmlDoc.SelectSingleNode("//Root/Student[Name='tree1']/Name").InnerText = "tree2";
XmlDoc.SelectSingleNode("//Root/Student[Name='tree1']").Attributes["id"].Value = "001";
//保存
XmlDoc.Save(Server.MapPath("../" + xmlFile));
}
protected void XmlQuery(object sender, EventArgs e)
{
XmlNodeList NodeList = XmlDoc.SelectNodes("//Root/Student");//查询全部的student节点
//循环遍历节点，查询是否存在该节点
for (int i = 0; i < NodeList.Count; i++)
{
Response.Write(NodeList[i].ChildNodes[0].InnerText);
}
//查询单个节点,//表示全部匹配的元素./表示以此为根的子元素.javascript下的查询也是一样.
string XmlPathNode = "//Root/Student[Name='rock']/Photo";
Response.Write(XmlDoc.SelectSingleNode(XmlPathNode).InnerText);
}
}

xml文件

复制代码代码如下:

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