using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.Xml;
using System.IO;

namespace FileManager
{
    public class XmlManager
    {
        #region 创建Xml文件，并创建根节点和属性
        /// <summary>
        /// 创建Xml文件，并创建根节点和属性
        /// </summary>
        /// <param name="xmlfullname">Xml文件的全路径</param>
        /// <param name="rootnode">根节点名</param>
        /// <param name="list_attributes">根节点的属性键值对</param>
        /// <returns></returns>
        public Boolean CreateXmlFile(String xmlfullname,String rootnode,List<KeyValuePair<String,String>> list_attributes)
        {
            XmlDocument xmlDoc = new XmlDocument();
            //创建类型声明节点  
            XmlNode node = xmlDoc.CreateXmlDeclaration("1.0", "utf-8", "");
            xmlDoc.AppendChild(node);
            //创建根节点  
            XmlNode root = xmlDoc.CreateElement(rootnode);
            xmlDoc.AppendChild(root);
            //为根节点增加属性
            for (int i = 0; i < list_attributes.Count; i++)
            {
                XmlNode attribute = xmlDoc.CreateNode(XmlNodeType.Attribute, list_attributes[i].Key, null);
                attribute.Value = list_attributes[i].Value;
                root.Attributes.SetNamedItem(attribute);
            }
            try
            {
                xmlDoc.Save(xmlfullname);
                return true;
            }
            catch (Exception e)
            {
                //显示错误信息  
                Console.WriteLine(e.Message);
                return false;
            }
        }
        #endregion

        #region 创建节点或子节点
        /// <summary>    
        /// 创建节点或子节点  
        /// </summary>    
        /// <param name="xmldoc">xml文档</param>    
        /// <param name="parentnode">父节点</param>    
        /// <param name="name">节点名</param>  
        /// <param name="value">节点值</param>  
        /// <param name="list_attributes">节点属性</param>
        public Boolean CreateNode(String xmlfullname, String parentNode, string name, string value, List<KeyValuePair<String, String>> list_attributes)
        {
            if(!File.Exists(xmlfullname) || name.Trim()=="" || parentNode.Trim()=="")
            {
                return false;
            }
            XmlDocument xmlDoc = new XmlDocument();
            try
            {
                xmlDoc.Load(xmlfullname);
               
                XmlNode root = xmlDoc.SelectSingleNode(parentNode);
                XmlNode node = xmlDoc.CreateNode(XmlNodeType.Element, name, null);
                //为根节点增加属性
                for (int i = 0; i < list_attributes.Count; i++)
                {
                    XmlNode attribute = xmlDoc.CreateNode(XmlNodeType.Attribute, list_attributes[i].Key, null);
                    attribute.Value = list_attributes[i].Value;
                    node.Attributes.SetNamedItem(attribute);
                }
                if (value.Trim() != "")
                {
                    node.InnerText = value;
                }
                root.AppendChild(node);
                
                xmlDoc.Save(xmlfullname);
                return true;
            }
            catch(Exception e)
            {
                return false;
            }
        }
        #endregion
    }
}