对xml的操作C#增加和修改_c#修改d t值-优快云博客

本文链接：https://blog.youkuaiyun.com/wangdetian168/article/details/1854733

本文介绍了一个使用C#进行XML文件配置项的修改与读取的示例。通过创建和操作XML元素来更新配置信息，并利用DataSet进行数据读取与更新。文中详细展示了如何在XML中添加新的配置节点并保存到文件。

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Xml;

namespace WindowsApplication1
{
    public partial class xmldo : Form
    {
        public xmldo()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(Application.StartupPath.ToString() + "//SystemConfig.xml");
            XmlElement xm = doc.CreateElement("CONFIGINFO");
            XmlElement xmLevel = doc.CreateElement("Level");
            xmLevel.InnerText = "界面";
            XmlElement xmCode = doc.CreateElement("Code");
            xmCode.InnerText = "界面";
            XmlElement xmName = doc.CreateElement("Name");
            xmName.InnerText = "界面";
            XmlElement xmValue = doc.CreateElement("Value");
            xmValue.InnerText = "界面";
            xm.AppendChild(xmLevel);
            xm.AppendChild(xmCode);
            xm.AppendChild(xmName);
            xm.AppendChild(xmValue);

            doc.DocumentElement.AppendChild(xm);
            //XmlNode xn = doc.SelectSingleNode("DataSet/CONFIGINFO");
            //xn.CloneNode(true);
            //xn["Level"].InnerText = "界面";
            //xn["Code"].InnerText = "WebServiceAddr1";
            //xn["Name"].InnerText = "服务器地址";
            //xn["Value"].InnerText = "http://192.168.3.210:9080/EDAServiceProject/services/ServiceEngine";
            //doc.DocumentElement.AppendChild(xn);
            doc.Save(Application.StartupPath.ToString() + "//SystemConfig.xml");
            Application.Exit();

}

        private void button2_Click(object sender, EventArgs e)
        {
            //XmlDocument doc = new XmlDocument();
            //doc.Load(Application.StartupPath.ToString() + "//SystemConfig.xml");
            DataSet ds = new DataSet();
            ds.ReadXml(Application.StartupPath.ToString() + "//SystemConfig.xml");
            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                if (Convert.ToString(ds.Tables[0].Rows[i]["Code"]) == "Password")
                {
                    ds.Tables[0].Rows[i]["Level"] = "密码mimam";
                    ds.Tables[0].Rows[i]["Name"] = "数据库连接密码123";
                    ds.Tables[0].Rows[i]["Value"] = "密码deviceinfodeviceinfo";
                }
            }
            ds.WriteXml(Application.StartupPath.ToString() + "//SystemConfig.xml");

//XmlNodeList xnl = doc.SelectSingleNode("DataSet/CONFIGINFO/Code").ParentNode.ChildNodes;

                //doc.Save(Application.StartupPath.ToString() + "//SystemConfig.xml");
                Application.Exit();
        }
    }
}

移动设备的文件路径的问题

//获得应用的路径
            string fullAppName = Assembly.GetExecutingAssembly().GetName().CodeBase;
            string fullAppPath = Path.GetDirectoryName(fullAppName);
            //DataSet ds = new DataSet();
            //ds.ReadXml(fullAppPath + "//" + "SystemConfig.xml");

            DataSet ds = new DataSet();
            ds.ReadXml(fullAppPath + "//" + "SystemConfig.xml");
            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                if (Convert.ToString(ds.Tables[0].Rows[i]["Code"]) == "Password")
                {
                    ds.Tables[0].Rows[i]["Level"] = "密码mimam";
                    ds.Tables[0].Rows[i]["Name"] = "数据库连接密码123";
                    ds.Tables[0].Rows[i]["Value"] = "密码deviceinfodeviceinfo";
                }
            }
            ds.WriteXml(fullAppPath + "//" + "SystemConfig.xml");
            ds.Clear();
            ds.ReadXml(fullAppPath + "//" + "SystemConfig.xml");
            this.dataGrid1.DataSource = ds.Tables[0];
            //MessageBox.Show(fullAppPath + "//" + "SystemConfig.xml");