Question

C#怎样删除XML指定节点和全部属性

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Answer 1

假设XML文件为：

<?xml version="1.0" encoding="utf-8"?>

<Connections>

  <Server1>

    <IP>173.1.0.1</IP>

    <DataBase>Book</DataBase>

    <User>sa</User>

    <PassWord>sa</PassWord>

  </Server1>

  <Server2>

    <IP>123.5.1.3</IP>

    <DataBase>Test</DataBase>

    <User>sa</User>

    <PassWord>da</PassWord>

  </Server2>

</Connections>

        /// <summary>
        /// 删除指定节点信息
        /// </summary>
        /// <param name="nodeTag"></param>
        public void DeleteXml(string nodeTag)
        {
            XmlNode root = xmlDoc.SelectSingleNode("Connections");
            if (root.HasChildNodes)//如果有子节点           
            {
                XmlNodeList nodelist = root.ChildNodes;
                for (int i = 0; i < nodelist.Count; i++)
                {
                    if (nodelist[i].Name == nodeTag)
                    {
                        nodelist[i].ParentNode.RemoveChild(nodelist[i]);
                    }
                    else
                    { }
                }
            }
            else
            { }

        }

//现在要删除Server1节点内的所有信息,nodeTag=="Server1"
private void button1_Click(object sender, EventArgs e)
        {
        string XmlFilePath = Application.StartupPath + "\\test.xml";
            if (File.Exists(XmlFilePath))
            {
                 XmlDocument xmlDoc = new XmlDocument();
                 xmlDoc.Load(XmlFilePath);
                DeleteXml("Server1");
                xmlDoc.SaveXml(XmlFilePath);
            }
            else
            {
                MessageBox.Show("路径下Xml文件不存在!");
            }
        }

删除后XML文件：

<?xml version="1.0" encoding="utf-8"?>

<Connections>

  <Server2>

    <IP>123.5.1.3</IP>

    <DataBase>Test</DataBase>

    <User>sa</User>

    <PassWord>da</PassWord>

  </Server2>

</Connections>