使用C#实现实体类和XML相互转换

一、实体类转换成XML

将实体类转换成XML需要使用XmlSerializer类的Serialize方法，将实体类序列化

public static string XmlSerialize<T>(T obj)
{
       using (StringWriter sw = new StringWriter())
       {
             Type t= obj.GetType();
             XmlSerializer serializer = new XmlSerializer(obj.GetType());
             serializer.Serialize(sw, obj);
             sw.Close();
             return sw.ToString();
        }
}

示例：

1、定义实体类

    [System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
    [System.Xml.Serialization.XmlRootAttribute(Namespace = "", IsNullable = false)]
    public class Request
    {

        public string System { get; set; }
        public string SecurityCode { get; set; }
        public PatientBasicInfo PatientInfo { get; set; }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
    public partial class PatientBasicInfo
    {
        public string PatientNo { get; set; }
        public string PatientName { get; set; }
        public string Phoneticize { get; set; }
        public string Sex { get; set; }
        public string Birth { get; set; }
        public string BirthPlace { get; set; }
        public string Country { get; set; }
        public string Nation { get; set; }
        public string IDNumber { get; set; }
        public string SecurityNo { get; set; }
        public string Workunits { get; set; }
        public string Address { get; set; }
        public string ZIPCode { get; set; }
        public string Phone { get; set; }
        public string ContactPerson { get; set; }
        public string ContactShip { get; set; }
        public string ContactPersonAdd { get; set; }
        public string ContactPersonPhone { get; set; }
        public string OperationCode { get; set; }
        public string OperationName { get; set; }
        public string OperationTime { get; set; }
        public string CardNo { get; set; }
        public string ChangeType { get; set; }

    }

2、给实体类赋值，并通过序列化将实体类转换成XML格式的字符串

 Request patientIn = new Request();
             patientIn.System = "HIS";
             patientIn.SecurityCode = "HIS5";

             PatientBasicInfo basicInfo = new PatientBasicInfo();
             basicInfo.PatientNo = "";
             basicInfo.PatientName = "测试";
             basicInfo.Phoneticize = "";
             basicInfo.Sex = "";
             basicInfo.Birth = "";
             basicInfo.BirthPlace = "";
             basicInfo.Country = "";
             basicInfo.Nation = "";
             basicInfo.IDNumber = "";
             basicInfo.SecurityNo = "";
             basicInfo.Workunits = "";
             basicInfo.Address = "";
             basicInfo.ZIPCode = "";
             basicInfo.Phone = "";
             basicInfo.ContactShip = "";
             basicInfo.ContactPersonPhone = "";
             basicInfo.ContactPersonAdd = "";
             basicInfo.ContactPerson = "";
             basicInfo.ChangeType = "";
             basicInfo.CardNo = "";
             basicInfo.OperationCode = "";
             basicInfo.OperationName = "";
             basicInfo.OperationTime = "";

             patientIn.PatientInfo = basicInfo;

             //序列化
             string strxml = XmlSerializeHelper.XmlSerialize<Request>(patientIn);

3、生成的XML实例

<?xml version="1.0" encoding="utf-16"?>
 <Request xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <System>HIS</System>
   <SecurityCode>HIS5</SecurityCode>
   <PatientInfo>
     <PatientNo></PatientNo>
     <PatientName>测试</PatientName>
     <Phoneticize />
     <Sex></Sex>
     <Birth />
     <BirthPlace />
     <Country />
     <Nation />
     <IDNumber />
     <SecurityNo />
     <Workunits />
     <Address />
     <ZIPCode />
     <Phone />
     <ContactPerson />
     <ContactShip />
     <ContactPersonAdd />
     <ContactPersonPhone />
     <OperationCode />
     <OperationName />
     <OperationTime />
     <CardNo />
     <ChangeType />
   </PatientInfo>
 </Request>

二、将XML转换成实体类

把XML转换成相应的实体类，需要使用到XmlSerializer类的Deserialize方法，将XML进行反序列化。

 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)
      {
             return null;
      }
 }

示例：

将上例中序列化后的XML反序列化成实体类

//反序列化
 Request r = XmlSerializeHelper.DESerializer<Request>(strxml);

三、将DataTable转换成XML
复制代码

//将DataTable转换成XML
 DataTable dt = new DataTable("MyTable");
 //添加列
 dt.Columns.Add("Id", typeof(int));
 dt.Columns.Add("Name", typeof(string));
 dt.Columns.Add("Sex", typeof(char));
 //添加行
 dt.Rows.Add(1, "小明", '1');
 dt.Rows.Add(2, "小红", '2');
 dt.Rows.Add(3, "小王", '2');
 dt.Rows.Add(4, "测试", '2');
 //序列化，将DataTable转换成XML格式的字符串
 string strXML = XmlSerializeHelper.XmlSerialize <DataTable> (dt);

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四、将XML转换成DataTable

1 //反序列化，将XML转换成字符串
2 DataTable dtNew=  XmlSerializeHelper.DESerializer<DataTable>(strXML);

五、将List集合转换成XML
复制代码

/// <summary>
/// 测试类
/// </summary>
public class Student
{
    public int Id { get; set; }
    public string Name { get; set; }
    public char Sex { get; set; }
    public int Age { get; set; }
}

//测试集合
List<Student> list = new List<Student>()
{
        new Student(){Id=1,Name="小红",Sex='2',Age=20},
        new Student(){Id=2,Name="小明",Sex='1',Age=22},
        new Student(){Id=3,Name="小王",Sex='1',Age=19},
        new Student(){Id=4,Name="测试",Sex='2',Age=23}
};
//序列化
string strXML = XmlSerializeHelper.XmlSerialize<List<Student>>(list);

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六、将XML转换成集合

使用上面例子中集合转换成的XML进行反序列化。

//反序列化
 List<Student> listStu = XmlSerializeHelper.DESerializer<List<Student>>(strXML);