C#中xml写入treeview，treeview写入xml

来源：互联网发布：雅思准备知乎编辑：程序博客网时间：2024/06/16 06:12

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Xml;

namespace treeview2   //你的项目名
{
    class TreeExXMLCls
    {
        private TreeView thetreeview;
        private string xmlfilepath;
        XmlTextWriter textWriter;
        XmlNode Xmlroot;
        XmlDocument textdoc;

        public TreeExXMLCls()
        {
            //----构造函数
            textdoc = new XmlDocument();

        }

        ~TreeExXMLCls()
        {
            //----析构函数
        }

        #region 遍历treeview并实现向XML的转化
        /// <summary>
        /// 遍历treeview并实现向XML的转化
        /// </summary>
        /// <param name="TheTreeView">树控件对象</param>
        /// <param name="XMLFilePath">XML输出路径</param>
        /// <returns>0表示函数顺利执行</returns>

        public int TreeToXML(TreeView TheTreeView, string XMLFilePath)
        {
            //-------初始化转换环境变量
            thetreeview = TheTreeView;
            xmlfilepath = XMLFilePath;
            textWriter = new XmlTextWriter(xmlfilepath, null);

            //-------创建XML写操作对象
            textWriter.Formatting = Formatting.Indented;

            //-------开始写过程，调用WriteStartDocument方法
            textWriter.WriteStartDocument();

            //-------写入说明
            textWriter.WriteComment("this XML is created from a tree");

            //-------添加第一个根节点
            textWriter.WriteStartElement("TreeExXMLCls");
            textWriter.WriteEndElement();

            //------ 写文档结束，调用WriteEndDocument方法
            textWriter.WriteEndDocument();

            //-----关闭输入流
            textWriter.Close();

            //-------创建XMLDocument对象
            textdoc.Load(xmlfilepath);

            //------选中根节点
            XmlElement Xmlnode=textdoc.CreateElement(thetreeview.Nodes[0].Text);
            Xmlroot = textdoc.SelectSingleNode("TreeExXMLCls");

            //------遍历原treeview控件，并生成相应的XML
            TransTreeSav(thetreeview.Nodes, (XmlElement)Xmlroot);
            return 0;
        }

        private int TransTreeSav(TreeNodeCollection nodes, XmlElement ParXmlnode)
        {

            //-------遍历树的各个故障节点，同时添加节点至XML
            XmlElement xmlnode;
            Xmlroot = textdoc.SelectSingleNode("TreeExXMLCls");

            foreach (TreeNode node in nodes)
            {
                xmlnode = textdoc.CreateElement(node.Text);
                ParXmlnode.AppendChild(xmlnode);

                if (node.Nodes.Count > 0)
                {
                    TransTreeSav(node.Nodes, xmlnode);
                }
            }
            textdoc.Save(xmlfilepath);
            return 0;
        }

        #endregion

        #region 遍历XML并实现向tree的转化
        /// <summary>
        /// 遍历treeview并实现向XML的转化
        /// </summary>
        /// <param name="XMLFilePath">XML输出路径</param>
        /// <param name="TheTreeView">树控件对象</param>
        /// <returns>0表示函数顺利执行</returns>

        public int XMLToTree(string XMLFilePath,TreeView TheTreeView)
        {
            //-------重新初始化转换环境变量
            thetreeview = TheTreeView;
            xmlfilepath = XMLFilePath;

            //-------重新对XMLDocument对象赋值
            textdoc.Load(xmlfilepath);

            XmlNode root = textdoc.SelectSingleNode("Authors_Table");//读的xml的节点名

            foreach (XmlNode subXmlnod in root.ChildNodes)
            {
                TreeNode trerotnod = new TreeNode();
                trerotnod.Text = subXmlnod.Name;
                thetreeview.Nodes.Add(trerotnod);
                TransXML(subXmlnod.ChildNodes, trerotnod);

            }
            return 0;
        }

        private int TransXML(XmlNodeList Xmlnodes,TreeNode partrenod)
        {
            //------遍历XML中的所有节点，仿照treeview节点遍历函数
            foreach (XmlNode xmlnod in Xmlnodes)
            {
                TreeNode subtrnod = new TreeNode();
                subtrnod.Text = xmlnod.Name+xmlnod.value;
                partrenod.Nodes.Add(subtrnod);

                if (xmlnod.ChildNodes.Count > 0)
                {
                    TransXML(xmlnod.ChildNodes, subtrnod);
                }
            }
            return 0;
        }
        #endregion
    }
}

上面是新建了个类。写完后要调用类方法

private void button1_Click(object sender, EventArgs e)
        {
            TreeExXMLCls a = new TreeExXMLCls();
            a.XMLToTree("D://实验室//匡老师项目//wxample2.xml",treeView1);
        }

按钮单击事件激活方法。就可以把节点显示到treeview里了。

最后祝大家愉快