List实体类、DataTable与xml互转

序列化常用Attribute讲解说明

[XmlRootAttribute("MyCity", Namespace="abc.abc", IsNullable=false)]     // 当该类为Xml根节点时，以此为根节点名称。
public class City

[XmlAttribute("AreaName")]    // 表现为Xml节点属性。<... AreaName="..."/>
public string Name

[XmlElementAttribute("AreaId", IsNullable = false)]    // 表现为Xml节点。<AreaId>...</AreaId>
public string Id

[XmlArrayAttribute("Areas")]    // 表现为Xml层次结构，根为Areas，其所属的每个该集合节点元素名为类名。<Areas><Area ... /><Area ... /></Areas>
public Area[] Areas

[XmlElementAttribute("Area", IsNullable = false)]    // 表现为水平结构的Xml节点。<Area ... /><Area ... />...
public Area[] Areas

[XmlIgnoreAttribute]    // 忽略该元素的序列化。

 /// <summary>
    /// XML序列化公共处理类
    /// </summary>
    public static class XmlSerializeHelper
    {
        /// <summary>
        /// 将实体对象转换成XML
        /// </summary>
        /// <typeparam name="T">实体类型</typeparam>
        /// <param name="obj">实体对象</param>
        public static string XmlSerialize<T>(T obj)
        {
            try
            {
                using (StringWriter sw = new StringWriter())
                {
                    Type t = obj.GetType();
                    XmlSerializer serializer = new XmlSerializer(obj.GetType());
                    serializer.Serialize(sw, obj);
                    sw.Close();
                    return sw.ToString();
                }
            }
            catch (Exception ex)
            {
                throw new Exception("将实体对象转换成XML异常", ex);
            }
        }

        /// <summary>
        /// 将XML转换成实体对象
        /// </summary>
        /// <typeparam name="T">实体类型</typeparam>
        /// <param name="strXML">XML</param>
        public static T DESerializer<T>(string strXML) where T : class
        {
            try
            {
                using (StringReader sr = new StringReader(strXML))
                {
                    XmlSerializer serializer = new XmlSerializer(typeof(T));
                    return serializer.Deserialize(sr) as T;
                }
            }
            catch (Exception ex)
            {
                throw new Exception("将XML转换成实体对象异常", ex);
            }
        }
    }

 static void Main(string[] args)
        {
            #region 测试数据
            List<UserInfo> userList = new List<UserInfo>();
            userList.Add(new UserInfo() { ID = 1, Name = "张三", CreateTime = DateTime.Now });
            userList.Add(new UserInfo() { ID = 2, Name = "李四", CreateTime = DateTime.Now });
            userList.Add(new UserInfo() { ID = 2, Name = "王五" });
            #endregion
            //将实体对象转换成XML
            string xmlResult = XmlSerializeHelper.XmlSerialize(userList);

            //将XML转换成实体对象
            List<UserInfo> deResult = XmlSerializeHelper.DESerializer<List<UserInfo>>(xmlResult);
        }
  /// <summary>
    /// 用户信息类
    /// </summary>
    public class UserInfo
    {
        /// <summary>
        /// 编号
        /// </summary>
        public int ID { get; set; }

        /// <summary>
        /// 名称
        /// </summary>
        public string Name { get; set; }

        /// <summary>
        /// 创建时间
        /// </summary>
        public DateTime? CreateTime { get; set; }
    }

 static void Main(string[] args)
        {
            #region 测试数据
            //创建DataTable
            DataTable dt = new DataTable("NewDt");

            //创建自增长的ID列
            DataColumn dc = dt.Columns.Add("ID", Type.GetType("System.Int32"));
            dt.Columns.Add(new DataColumn("Name", Type.GetType("System.String")));
            dt.Columns.Add(new DataColumn("CreateTime", Type.GetType("System.DateTime")));

            //创建数据
            DataRow dr = dt.NewRow();
            dr["ID"] = 1;
            dr["Name"] = "张三";
            dr["CreateTime"] = DateTime.Now;
            dt.Rows.Add(dr);

            dr = dt.NewRow();
            dr["ID"] = 2;
            dr["Name"] = "李四";
            dr["CreateTime"] = DateTime.Now;
            dt.Rows.Add(dr);

            dr = dt.NewRow();
            dr["ID"] = 3;
            dr["Name"] = "王五";
            dr["CreateTime"] = DateTime.Now;
            dt.Rows.Add(dr);
            #endregion
            //将DataTable转换成XML
            string xmlResult = XmlSerializeHelper.XmlSerialize(dt);

            //将XML转换成DataTable
            DataTable deResult = XmlSerializeHelper.DESerializer<DataTable>(xmlResult);
        }