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c#操作xml练习.

.aspx文件

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="XmlTest.aspx.cs" Inherits="XmlTest" validateRequest="false"  %>

<!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>XML操作练习</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        
        <asp:LinkButton ID="LinkButtonCreate" runat="server" OnClick="LinkButtonCreate_Click">创建Xml文件</asp:LinkButton> 
        <asp:LinkButton ID="LinkButtonAdd" runat="server" OnClick="LinkButtonAdd_Click">批量添加Book结点</asp:LinkButton> 
        <asp:LinkButton ID="LinkButtonShow" runat="server" OnClick="LinkButtonShow_Click">显示Xml内容</asp:LinkButton> 
        <asp:LinkButton ID="LinkButtonDel" runat="server" OnClick="LinkButtonDel_Click">删除全部结点</asp:LinkButton> 
        
        <hr />
        子结点名:<asp:TextBox ID="TextBoxNode" runat="server">author</asp:TextBox> 
        子结点值:<asp:TextBox ID="TextBoxNodeValue" runat="server">张三</asp:TextBox>
        <asp:LinkButton ID="LinkButtonSearchNode" runat="server" onclick="LinkButtonSearchNode_Click">查找结点</asp:LinkButton>
        修改子结点值:<asp:TextBox ID="TextBoxEditNodeValue" runat="server"></asp:TextBox>
        <asp:LinkButton ID="LinkButtonEdit" runat="server" OnClick="LinkButtonSearchNode_Click">修改结点</asp:LinkButton> 
         <asp:LinkButton ID="LinkButtonDelNode" runat="server" OnClick="LinkButtonDelNode_Click">删除结点(可以删除多个结点)</asp:LinkButton> 
        
        <hr />
        book属性Id值:<asp:TextBox ID="TextBoxAttribute" runat="server">2</asp:TextBox>
        子结点:<asp:TextBox ID="TextBoxChildNode" runat="server"></asp:TextBox>
        <asp:LinkButton ID="LinkButtonSearch" runat="server" onclick="LinkButtonSearch_Click">查找</asp:LinkButton>
        <br />
        
        属性名称:<asp:TextBox ID="TextBoxAttributeName" runat="server"></asp:TextBox>
        属性值:<asp:TextBox ID="TextBoxAttributeValue" runat="server"></asp:TextBox>
        <asp:LinkButton ID="LinkButtonAdd2" runat="server" OnClick="LinkButtonAdd2_Click">添加修改属性</asp:LinkButton> 
        
        <asp:LinkButton ID="LinkButtonDelAttribute" runat="server" OnClick="LinkButtonDelAttribute_Click">删除属性</asp:LinkButton> 
        
        
        
        
        <hr />
        <asp:Label ID="Label1" runat="server" Text="这里显示提示信息!" ForeColor="#FF3300"></asp:Label>
        
        <hr />
        <asp:TextBox ID="TextBox1" runat="server" Height="330px" Width="617px" TextMode="MultiLine"></asp:TextBox>
            <iframe  id="IframeTT" runat="server" src="xml/booktest.xml" height="330px" width="617px" frameborder="1" style="border-style: solid; border- 0px" ></iframe>
            
    </div>
        
    </form>
</body>
</html>

.cs文件

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;

using System.Collections.Generic;


public partial class XmlTest : System.Web.UI.Page
{

    protected void Page_Load(object sender, EventArgs e)
    {

             

    }


    protected void LinkButtonCreate_Click(object sender, EventArgs e)
    {
        string path = Server.MapPath("Xml/bookTest.xml");
        XmlDocument Doc = new XmlDocument();
        XmlDeclaration DecA = Doc.CreateXmlDeclaration("1.0", null, null); //默认为utf-8
        Doc.AppendChild(DecA);
        //创建一个根节点（一级）
        XmlElement Root = Doc.CreateElement("Root");
        Doc.AppendChild(Root);

        //创建节点（二级） XmlNode不能直接带属性
        XmlNode node2 = Doc.CreateElement("Book");
        Root.AppendChild(node2);

        //创建节点（二级）只带属性   ----注意XmlElement和XmlNode不同,XmlElement可以有属性
        XmlElement Element = Doc.CreateElement("Book");
        Element.SetAttribute("Id", "1");
        Element.SetAttribute("Name", "test111");
        Element.SetAttribute("PageCount", "111");
        Root.AppendChild(Element);

        //创建节点（二级）带属性和子节点   ----注意XmlElement和XmlNode不同,XmlElement可以有属性
        XmlElement Element1 = Doc.CreateElement("Book");
        Element1.SetAttribute("Id", "2");
        Element1.SetAttribute("Name", "test222");
        Element1.SetAttribute("PageCount", "222");
        Root.AppendChild(Element1);

        //创建节点（三级）只有值
        XmlElement Element2 = Doc.CreateElement("price");
        Element2.InnerText = "22.50";
        Element1.AppendChild(Element2);

        //创建节点（三级）只有值
        Element2 = Doc.CreateElement("author");
        Element2.InnerText = "张三";
        Element1.AppendChild(Element2);

        //创建节点（三级）只有值
        Element2 = Doc.CreateElement("Content");
        Element2.InnerText = "简介Test简介Test简介Test简介Test简介Test简介Test简介Test简介Test简介Test简介Test简介Test简介Test";
        Element1.AppendChild(Element2);

        Doc.Save(@path);
        Label1.Text=DateTime.Now.ToString()+"创建XML文件:"+path+"成功!";
        TextBox1.Text = System.IO.File.ReadAllText(@path);
 
    }
    protected void LinkButtonAdd_Click(object sender, EventArgs e)
    {
        string  path;
        path = Server.MapPath("xml/bookTest.xml");
        XmlDocument Doc = new XmlDocument();
        Doc.Load(@path);
        XmlNode Root = Doc.SelectSingleNode("Root");
        int NodeCount=Root.ChildNodes.Count;//结点个数

        for (int i = NodeCount; i < 10 + NodeCount; i++)
        {
            
            //创建新节点（只有属性）
            XmlElement Element1 = Doc.CreateElement("Book");
            Element1.SetAttribute("Id", i.ToString());
            Element1.SetAttribute("Name", "book"+i.ToString());
            Element1.SetAttribute("PageCount", "100"+i.ToString());

            //创建子节点（只有值）
            XmlElement Element2 = Doc.CreateElement("price");
            Element2.InnerText = "10" + i.ToString() + ".50";
            Element1.AppendChild(Element2);

            //创建子节点（只有值）
            Element2 = Doc.CreateElement("author");
            Element2.InnerText = "张三("+i.ToString()+")";
            Element1.AppendChild(Element2);

            //创建子节点（只有值）
            Element2 = Doc.CreateElement("Content");
            Element2.InnerText = "简介("+i.ToString()+")Test简介Test简介Test";
            Element1.AppendChild(Element2);

            Root.AppendChild(Element1);
        }
 

        Doc.Save(@path);//保存
        Label1.Text = DateTime.Now.ToString() + "显示XML文件:" + path + "成功!";//提示
        TextBox1.Text = System.IO.File.ReadAllText(@path);//输出到TextBox

    }

    protected void LinkButtonDel_Click(object sender, EventArgs e)
    {

        string path;
        path = Server.MapPath("xml/bookTest.xml");
        XmlDocument Doc = new XmlDocument();
        Doc.Load(@path);
        XmlNode Root = Doc.SelectSingleNode("Root");
        Root.RemoveAll();

        Doc.Save(@path);//保存
        Label1.Text = DateTime.Now.ToString() + "清除XML文件:" + path + "成功!";//提示
        TextBox1.Text = System.IO.File.ReadAllText(@path);//输出到TextBox
    }

    
    protected void LinkButtonShow_Click(object sender, EventArgs e)
    {
        string XmlContent,path;
        path = Server.MapPath("xml/bookTest.xml");

        XmlContent = System.IO.File.ReadAllText(@path);
        TextBox1.Text = XmlContent;
        Label1.Text = DateTime.Now.ToString() + "显示XML文件:" + path + "成功!";
        IframeTT.ResolveUrl("xml/booktest.xml");
    }


    protected void LinkButtonAdd2_Click(object sender, EventArgs e)
    {

        string SearchAttribute = TextBoxAttribute.Text;
        string SearchTextBoxChildNode = TextBoxChildNode.Text;

        string AddAttributeName = TextBoxAttributeName.Text;
        string AddAttributeValue = TextBoxAttributeValue.Text;

        string path = Server.MapPath("xml/bookTest.xml");
        string ShowStr = "";

        if (SearchTextBoxChildNode!="")
        {
            SearchTextBoxChildNode = "/" + SearchTextBoxChildNode;
            
        }

        if (SearchAttribute == "" && AddAttributeName == "" )
        {
            Common.JScript.Alert("属性ID 与  添加属性名称 必填");
        }
        else
        {
            XmlDocument Doc = new XmlDocument();
            Doc.Load(@path);

            XmlElement Node =(XmlElement) Doc.SelectSingleNode("Root/Book[@Id='" + SearchAttribute + "']" + SearchTextBoxChildNode);
            if (Node != null)
            {
                Node.SetAttribute(AddAttributeName, AddAttributeValue);
                if (SearchTextBoxChildNode != "")
                {
                    ShowStr = ShowStr + "\n-----结点:" + Node.Name;
                    ShowStr = ShowStr + "\n-----结点值:" + Node.InnerText;
                    foreach (XmlAttribute item in Node.Attributes)
                    {
                        ShowStr = ShowStr + "\n属性" + item.Name + "=" + item.Value;
                    }

                }
                else
                {
                    ShowStr = ShowStr + "\n-----结点:" + Node.Name;

                    //添加属性

                    foreach (XmlAttribute item in Node.Attributes)
                    {
                        ShowStr = ShowStr + "\n属性" + item.Name + "=" + item.Value;
                    }
                    foreach (XmlElement item in Node.ChildNodes)
                    {
                        ShowStr = ShowStr + "\n子结点:" + item.Name + "=" + item.InnerText;
                    }
                }

            }
            else
            {
                ShowStr = "没有找到!";
            }

            Doc.Save(@path);//保存
            Label1.Text = DateTime.Now.ToString() + "查找结点:" + path + "成功!";//提示
            TextBox1.Text = ShowStr;//输出到TextBox
        }
    }
    protected void LinkButtonDelAttribute_Click(object sender, EventArgs e)
    {
        string SearchAttribute = TextBoxAttribute.Text;
        string SearchTextBoxChildNode = TextBoxChildNode.Text;

        string AddAttributeName = TextBoxAttributeName.Text;
        string AddAttributeValue = TextBoxAttributeValue.Text;

        string path = Server.MapPath("xml/bookTest.xml");
        string ShowStr = "";

        if (SearchTextBoxChildNode != "")
        {
            SearchTextBoxChildNode = "/" + SearchTextBoxChildNode;

        }

        if (SearchAttribute == "" && AddAttributeName == "")
        {
            Common.JScript.Alert("属性ID 与  添加属性名称 必填");
        }
        else
        {
            XmlDocument Doc = new XmlDocument();
            Doc.Load(@path);

            XmlElement Node = (XmlElement)Doc.SelectSingleNode("Root/Book[@Id='" + SearchAttribute + "']" + SearchTextBoxChildNode);
            if (Node != null)
            {
                //删除结点属性
                Node.RemoveAttribute(AddAttributeName);

                if (SearchTextBoxChildNode != "")
                {
                    ShowStr = ShowStr + "\n-----结点:" + Node.Name;
                    ShowStr = ShowStr + "\n-----结点值:" + Node.InnerText;
                    foreach (XmlAttribute item in Node.Attributes)
                    {
                        ShowStr = ShowStr + "\n属性" + item.Name + "=" + item.Value;
                    }
                }
                else
                {
                    ShowStr = ShowStr + "\n-----结点:" + Node.Name;
                    //添加属性
                    foreach (XmlAttribute item in Node.Attributes)
                    {
                        ShowStr = ShowStr + "\n属性" + item.Name + "=" + item.Value;
                    }
                    foreach (XmlElement item in Node.ChildNodes)
                    {
                        ShowStr = ShowStr + "\n子结点:" + item.Name + "=" + item.InnerText;
                    }
                }

            }
            else
            {
                ShowStr = "没有找到!";
            }

            Doc.Save(@path);//保存
            Label1.Text = DateTime.Now.ToString() + "删除结点属性:" + path + "成功!";//提示
            TextBox1.Text = ShowStr;//输出到TextBox
        }
    }

    /// <summary>
    /// 查找
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void LinkButtonSearch_Click(object sender, EventArgs e)
    {
        string SearchNode=TextBoxNode.Text;
        string SearchAttribute = TextBoxAttribute.Text;
        string SearchTextBoxChildNode = TextBoxChildNode.Text;
        string path = Server.MapPath("xml/bookTest.xml");
        string ShowStr = "";

        if (SearchTextBoxChildNode!="")
        {
            SearchTextBoxChildNode = "/" + SearchTextBoxChildNode;
            
        }
        
        if (SearchAttribute == "")
        {
            Common.JScript.Alert("属性ID必填");
        }
        else {
            XmlDocument Doc = new XmlDocument();
            Doc.Load(@path);

            XmlNode Node = Doc.SelectSingleNode("Root/Book[@Id='" + SearchAttribute + "']" + SearchTextBoxChildNode);
            if (Node != null)
            {
                if (SearchTextBoxChildNode != "")
                {
                    ShowStr = ShowStr + "\n-----结点:" + Node.Name;
                    ShowStr = ShowStr + "\n-----结点值:" + Node.InnerText;
                    foreach (XmlAttribute item in Node.Attributes)
                    {
                        ShowStr = ShowStr + "\n属性" + item.Name + "=" + item.Value;
                    }

                }else{
                    ShowStr = ShowStr + "\n-----结点:" + Node.Name;
                    foreach (XmlAttribute item in Node.Attributes)
                    {
                        ShowStr = ShowStr + "\n属性" + item.Name + "=" + item.Value;
                    }
                    foreach (XmlElement item in Node.ChildNodes)
                    {
                        ShowStr = ShowStr + "\n子结点:" + item.Name + "=" + item.InnerText;
                    }
                }

            }
            else {
                ShowStr = "没有找到!";
            }

            Doc.Save(@path);//保存
            Label1.Text = DateTime.Now.ToString() + "查找结点:" + path + "成功!";//提示
            TextBox1.Text = ShowStr;//输出到TextBox
        }
    }
    protected void LinkButtonSearchNode_Click(object sender, EventArgs e)
    {
        string SearchNode=TextBoxNode.Text;
        string SearchNodeValue = TextBoxNodeValue.Text;
        string SearchEditNodeValue = TextBoxEditNodeValue.Text;
        string path = Server.MapPath("xml/bookTest.xml");
        string ShowStr = "";
        string ShowStr2 = "";

        XmlDocument Doc = new XmlDocument();
        Doc.Load(@path);

        if (SearchNode == "")
        {
            Common.JScript.Alert("经查找的结点必须输入!");
        }
        else
        {

            XmlNodeList NodeList = Doc.GetElementsByTagName(SearchNode);
            if (NodeList != null)
            {
                foreach (XmlNode item in NodeList)
                {
                    if (!(SearchNodeValue.Equals("")))
                    {
                        if (SearchNodeValue.Equals(item.InnerText))
                        {
                            ShowStr = ShowStr + "\n结点值:" + item.InnerText;
                            //修改结点值
                            if (!(SearchEditNodeValue.Equals(""))) { item.InnerText = SearchEditNodeValue; }

                            ShowStr = ShowStr + "----父结点<" + item.ParentNode.Name;
                            foreach (XmlAttribute itemAttrib in item.ParentNode.Attributes)
                            {
                                ShowStr = ShowStr + " " + itemAttrib.Name + "=\"" + itemAttrib.Value + "\"";
                            }
                            ShowStr = ShowStr + " />";
                        }
                        else
                        {
                            ShowStr2 = " 没找到这个结点!";
                        }
                    }
                    else if (SearchNodeValue.Equals("") && SearchEditNodeValue.Equals(""))
                    {
                        ShowStr = ShowStr + "\n结点值:" + item.InnerText;
                        //修改结点值
                        if (!(SearchEditNodeValue.Equals(""))) { item.InnerText = SearchEditNodeValue; }

                        ShowStr = ShowStr + "----父结点<" + item.ParentNode.Name;
                        foreach (XmlAttribute itemAttrib in item.ParentNode.Attributes)
                        {
                            ShowStr = ShowStr + " " + itemAttrib.Name + "=\"" + itemAttrib.Value + "\"";
                        }
                        ShowStr = ShowStr + " />";
                    }
                    else
                    {
                        ShowStr2 = " 没找到这个结点!";
                    }
                }
            }
        }


        Doc.Save(@path);//保存
        Label1.Text = DateTime.Now.ToString() + "查找结点:" + path + "成功!";//提示
        if (ShowStr.Equals(""))
        {
            TextBox1.Text = ShowStr2;//输出到TextBox
        }
        else
        {
            TextBox1.Text = ShowStr;//输出到TextBox
        }
    }
    protected void LinkButtonDelNode_Click(object sender, EventArgs e)
    {
        string SearchNode = TextBoxNode.Text;
        string SearchNodeValue = TextBoxNodeValue.Text;
        string SearchEditNodeValue = TextBoxEditNodeValue.Text;
        string path = Server.MapPath("xml/bookTest.xml");
        string ShowStr = "";
        string ShowStr2 = "";

        XmlDocument Doc = new XmlDocument();
        Doc.Load(@path);

        if (SearchNode == "")
        {
            Common.JScript.Alert("经查找的结点必须输入!");
        }
        else
        {

            XmlNodeList NodeList = Doc.GetElementsByTagName(SearchNode);
            XmlNode DelNodel=null;
            List<XmlNode> ParentNode=new List<XmlNode>();
            if (NodeList != null)
            {
                foreach (XmlNode item in NodeList)
                {
                    if (SearchNodeValue != "" && item.InnerText == SearchNodeValue)
                    {
                        //得到删除结点
                        DelNodel = item;
                    }
                    else if (SearchNodeValue.Equals(""))
                    {
                        //删除结点
                        //item.ParentNode.RemoveChild(item);                       
                       ParentNode.Add(item.ParentNode);                        
                    }
                    else
                    {
                        ShowStr2 = "\n 没找到这个结点2!" ;
                    }
                    ShowStr = ShowStr +"\n"+ item.InnerText;
                    //Response.Write("[" + SearchNodeValue + "][" + item.InnerText + "]");
                    //if (item.InnerText == SearchNodeValue) { Common.JScript.Alert("LL"); }
                }
                if (DelNodel != null) { DelNodel.ParentNode.RemoveChild(DelNodel); }
                if (ParentNode != null) {
                    foreach (XmlNode item in ParentNode)
                    {
                        item.RemoveChild( item.SelectSingleNode(SearchNode));
                    }
                }
            }
        }


        Doc.Save(@path);//保存
        Label1.Text = DateTime.Now.ToString() + "查找结点:" + path + "成功!" + ShowStr2;//提示
        TextBox1.Text = System.IO.File.ReadAllText(@path);//输出到TextBox
    }
}

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原文地址：https://www.cnblogs.com/q149072205/p/2095584.html