C#实体类（复杂类）与XML互相转换

实体类转换成XML方法：

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 (System.IO.StringWriter sw = new StringWriter())
    {
        Type t = obj.GetType();
        System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(obj.GetType());
        serializer.Serialize(sw, obj);
        sw.Close();
        return sw.ToString();
    }
}

例子：

定义实体类

    public class root
    {
        public head head { get; set; }
        public body body { get; set; }
    }

    public class head
    {
        public string organ { get; set; }
        public string jkxlh { get; set; }
        public string jkid { get; set; }
    }

    //注意！body类的vehispara的类型是dynamic 所以需要使用XmlInclude表示body可以解析的类型
    [System.Xml.Serialization.XmlInclude(typeof(JCZ01))]
    [System.Xml.Serialization.XmlInclude(typeof(JCZ02))]
    public partial class body
    {
        public dynamic vehispara { get; set; }//接受动态业务类型 即JCZ01、JCZ02等等
    }

    public class JCZ01
    {
        public string tsno { get; set; }
        public string orgcode { get; set; }
        public string teststation { get; set; }
        public string testaddress { get; set; }
        public DateTime? firstauthdate { get; set; }
        public DateTime? jlrzyxrq { get; set; }
        public DateTime? linkdate { get; set; }
        public string legalperson { get; set; }
        public string test { get; set; }
        public string testtel { get; set; }
        public int testlines { get; set; }
        public string status { get; set; }
        public decimal? lng { get; set; }
        public decimal? lat { get; set; }
    }

    public class JCZ02
    {
        public string tsno { get; set; }
        public string testlineno { get; set; }
        public string firstauthdate { get; set; }
        public string testtype { get; set; }
        public string status { get; set; }
        public string gwip { get; set; }
        public string lxpzq { get; set; }
        public string lxpzh { get; set; }
        public string lxpzczj { get; set; }
        public string lxpzdt { get; set; }
        public string jclc { get; set; }
        public string jcbbh { get; set; }
        public string provider { get; set; }
        public string testexpiredade { get; set; }
        public string dynamometer { get; set; }
        public string dprovider { get; set; }
        public string dadate { get; set; }
        public string analyser { get; set; }
        public string aprovider { get; set; }
        public string aadate { get; set; }
        public string flowmeter { get; set; }
        public string fprovider { get; set; }
        public string fadate { get; set; }
        public string smokemeter { get; set; }
        public string sprovider { get; set; }
        public string sadate { get; set; }
        public string tachometer { get; set; }
        public string tprovider { get; set; }
        public string tadate { get; set; }
        public string otsensor { get; set; }
        public string oprovider { get; set; }
        public string oadate { get; set; }
        public string wstype { get; set; }
        public string wsrovider { get; set; }
    }

实体类转XML代码

//Linq to sql 获取数据
var query = from sta in det.Org_DetectStation join line in lineCount on sta.StaID equals line.StaID
            where sta.StaID == staid
            select new JCZ01
            {
                tsno = cityid + sta.StaID.Substring(,),
                orgcode = cityid + sta.StaID.Substring(, ),
                teststation = sta.StaName,
                testaddress = sta.Address,
                firstauthdate = sta.CMADate,
                jlrzyxrq = sta.CMADate,
                linkdate = sta.CMADate,
                legalperson = sta.CEOName,
                test = sta.CEOName,
                testtel = sta.CEOOfficePhone,
                testlines = line.LineCount,
                status = sta.StaState==?"":"",
                lng = sta.Longitude,
                lat = sta.Latitude
            };
List<JCZ01> jcz011 = query.ToList<JCZ01>();
root r = new root();
head h = new head();
h.jkid = Properties.Settings.Default.JKBH;
h.jkxlh = Properties.Settings.Default.JKXLH;
body b = new body();
b.vehispara = jcz011[];
r.head = h;
r.body = b;

string strhxml = XmlSerialize<head>(h);
string strbxml = XmlSerialize<body>(b);
string strrxml = XmlSerialize<root>(r);

生成的XML实例

<?xml version="1.0" encoding="utf-16"?>
<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <head>
    <jkxlh>BD11F82096F0290DB2866BD266A0CEDF</jkxlh>
    <jkid>23270000</jkid>
  </head>
  <body>
    <vehispara xsi:type="JCZ01">
      <tsno>23270002</tsno>
      <orgcode>23270002</orgcode>
      <teststation>XXXX有限公司</teststation>
      <testaddress>测试</testaddress>
      <firstauthdate>2038-08-11T00:00:00</firstauthdate>
      <jlrzyxrq>2038-08-11T00:00:00</jlrzyxrq>
      <linkdate>2038-08-11T00:00:00</linkdate>
      <legalperson>测试</legalperson>
      <test>测试</test>
      <testtel />
      <testlines>1</testlines>
      <status>1</status>
      <lng xsi:nil="true" />
      <lat xsi:nil="true" />
    </vehispara>
  </body>
</root>

XML转实体类：

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;
     }
}    

实体类转XML需注意的问题：

当实体类的string类型字段为null时，序列化成XML时会忽略掉这个字段（即序列化后的XML中没有该节点）

解决的办法我知道的有两个，第一个把该字段赋值为空字符串，另一个就是给类的属性加上XmlElement(IsNullable=true)特性，如：

public class JCZ01
    {
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public string tsno { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public string orgcode { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public string teststation { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public string testaddress { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public DateTime? firstauthdate { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public DateTime? jlrzyxrq { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public DateTime? linkdate { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public string legalperson { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public string test { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public string testtel { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public int? testlines { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public string status { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public decimal? lng { get; set; }
        [System.Xml.Serialization.XmlElement(IsNullable = true)]
        public decimal? lat { get; set; }
    }

参考：https://www.cnblogs.com/dotnet261010/p/6513618.html

出处：https://blog.csdn.net/CGS_______/article/details/84559590