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

1.  
   public static string XmlSerialize<T>(T obj)
2.  
   {
3.  
   using (System.IO.StringWriter sw = new StringWriter())
4.  
   {
5.  
   Type t = obj.GetType();
6.  
   System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(obj.GetType());
7.  
   serializer.Serialize(sw, obj);
8.  
   sw.Close();
9.  
   return sw.ToString();
10.  
    }
11.  
    }

例子：

定义实体类

1.  
   public class root
2.  
   {
3.  
   public head head { get; set; }
4.  
   public body body { get; set; }
5.  
   }
6.  
    
7.  
   public class head
8.  
   {
9.  
   public string organ { get; set; }
10.  
    public string jkxlh { get; set; }
11.  
    public string jkid { get; set; }
12.  
    }
13.  
     
14.  
    //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
15.  
    [System.Xml.Serialization.XmlInclude(typeof(JCZ01))]
16.  
    [System.Xml.Serialization.XmlInclude(typeof(JCZ02))]
17.  
    public partial class body
18.  
    {
19.  
    public dynamic vehispara { get; set; }//接受动态业务类型 即JCZ01、JCZ02等等
20.  
    }
21.  
     
22.  
    public class JCZ01
23.  
    {
24.  
    public string tsno { get; set; }
25.  
    public string orgcode { get; set; }
26.  
    public string teststation { get; set; }
27.  
    public string testaddress { get; set; }
28.  
    public DateTime? firstauthdate { get; set; }
29.  
    public DateTime? jlrzyxrq { get; set; }
30.  
    public DateTime? linkdate { get; set; }
31.  
    public string legalperson { get; set; }
32.  
    public string test { get; set; }
33.  
    public string testtel { get; set; }
34.  
    public int testlines { get; set; }
35.  
    public string status { get; set; }
36.  
    public decimal? lng { get; set; }
37.  
    public decimal? lat { get; set; }
38.  
    }
39.  
     
40.  
    public class JCZ02
41.  
    {
42.  
    public string tsno { get; set; }
43.  
    public string testlineno { get; set; }
44.  
    public string firstauthdate { get; set; }
45.  
    public string testtype { get; set; }
46.  
    public string status { get; set; }
47.  
    public string gwip { get; set; }
48.  
    public string lxpzq { get; set; }
49.  
    public string lxpzh { get; set; }
50.  
    public string lxpzczj { get; set; }
51.  
    public string lxpzdt { get; set; }
52.  
    public string jclc { get; set; }
53.  
    public string jcbbh { get; set; }
54.  
    public string provider { get; set; }
55.  
    public string testexpiredade { get; set; }
56.  
    public string dynamometer { get; set; }
57.  
    public string dprovider { get; set; }
58.  
    public string dadate { get; set; }
59.  
    public string analyser { get; set; }
60.  
    public string aprovider { get; set; }
61.  
    public string aadate { get; set; }
62.  
    public string flowmeter { get; set; }
63.  
    public string fprovider { get; set; }
64.  
    public string fadate { get; set; }
65.  
    public string smokemeter { get; set; }
66.  
    public string sprovider { get; set; }
67.  
    public string sadate { get; set; }
68.  
    public string tachometer { get; set; }
69.  
    public string tprovider { get; set; }
70.  
    public string tadate { get; set; }
71.  
    public string otsensor { get; set; }
72.  
    public string oprovider { get; set; }
73.  
    public string oadate { get; set; }
74.  
    public string wstype { get; set; }
75.  
    public string wsrovider { get; set; }
76.  
    }

实体类转XML代码

1.  
   //Linq to sql 获取数据
2.  
   var query = from sta in det.Org_DetectStation join line in lineCount on sta.StaID equals line.StaID
3.  
   where sta.StaID == staid
4.  
   select new JCZ01
5.  
   {
6.  
   tsno = cityid + sta.StaID.Substring(4,2),
7.  
   orgcode = cityid + sta.StaID.Substring(4, 2),
8.  
   teststation = sta.StaName,
9.  
   testaddress = sta.Address,
10.  
    firstauthdate = sta.CMADate,
11.  
    jlrzyxrq = sta.CMADate,
12.  
    linkdate = sta.CMADate,
13.  
    legalperson = sta.CEOName,
14.  
    test = sta.CEOName,
15.  
    testtel = sta.CEOOfficePhone,
16.  
    testlines = line.LineCount,
17.  
    status = sta.StaState==0?"1":"2",
18.  
    lng = sta.Longitude,
19.  
    lat = sta.Latitude
20.  
    };
21.  
    List<JCZ01> jcz011 = query.ToList<JCZ01>();
22.  
    root r = new root();
23.  
    head h = new head();
24.  
    h.jkid = Properties.Settings.Default.JKBH;
25.  
    h.jkxlh = Properties.Settings.Default.JKXLH;
26.  
    body b = new body();
27.  
    b.vehispara = jcz011[0];
28.  
    r.head = h;
29.  
    r.body = b;
30.  
     
31.  
    string strhxml = XmlSerialize<head>(h);
32.  
    string strbxml = XmlSerialize<body>(b);
33.  
    string strrxml = XmlSerialize<root>(r);

生成的XML实例

1.  
   <?xml version="1.0" encoding="utf-16"?>
2.  
   <root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
3.  
   <head>
4.  
   <jkxlh>BD11F82096F0290DB2866BD266A0CEDF</jkxlh>
5.  
   <jkid>23270000</jkid>
6.  
   </head>
7.  
   <body>
8.  
   <vehispara xsi:type="JCZ01">
9.  
   <tsno>23270002</tsno>
10.  
    <orgcode>23270002</orgcode>
11.  
    <teststation>XXXX有限公司</teststation>
12.  
    <testaddress>测试</testaddress>
13.  
    <firstauthdate>2038-08-11T00:00:00</firstauthdate>
14.  
    <jlrzyxrq>2038-08-11T00:00:00</jlrzyxrq>
15.  
    <linkdate>2038-08-11T00:00:00</linkdate>
16.  
    <legalperson>测试</legalperson>
17.  
    <test>测试</test>
18.  
    <testtel />
19.  
    <testlines>1</testlines>
20.  
    <status>1</status>
21.  
    <lng xsi:nil="true" />
22.  
    <lat xsi:nil="true" />
23.  
    </vehispara>
24.  
    </body>
25.  
    </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

1.  
   public static T DESerializer<T>(string strXML) where T:class
2.  
   {
3.  
   try
4.  
   {
5.  
   using (StringReader sr = new StringReader(strXML))
6.  
   {
7.  
   XmlSerializer serializer = new XmlSerializer(typeof(T));
8.  
   return serializer.Deserialize(sr) as T;
9.  
   }
10.  
    }
11.  
    catch (Exception ex)
12.  
    {
13.  
    return null;
14.  
    }
15.  
    }

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：

1.  
   public class JCZ01
2.  
   {
3.  
   [System.Xml.Serialization.XmlElement(IsNullable = true)]
4.  
   public string tsno { get; set; }
5.  
   [System.Xml.Serialization.XmlElement(IsNullable = true)]
6.  
   public string orgcode { get; set; }
7.  
   [System.Xml.Serialization.XmlElement(IsNullable = true)]
8.  
   public string teststation { get; set; }
9.  
   [System.Xml.Serialization.XmlElement(IsNullable = true)]
10.  
    public string testaddress { get; set; }
11.  
    [System.Xml.Serialization.XmlElement(IsNullable = true)]
12.  
    public DateTime? firstauthdate { get; set; }
13.  
    [System.Xml.Serialization.XmlElement(IsNullable = true)]
14.  
    public DateTime? jlrzyxrq { get; set; }
15.  
    [System.Xml.Serialization.XmlElement(IsNullable = true)]
16.  
    public DateTime? linkdate { get; set; }
17.  
    [System.Xml.Serialization.XmlElement(IsNullable = true)]
18.  
    public string legalperson { get; set; }
19.  
    [System.Xml.Serialization.XmlElement(IsNullable = true)]
20.  
    public string test { get; set; }
21.  
    [System.Xml.Serialization.XmlElement(IsNullable = true)]
22.  
    public string testtel { get; set; }
23.  
    [System.Xml.Serialization.XmlElement(IsNullable = true)]
24.  
    public int? testlines { get; set; }
25.  
    [System.Xml.Serialization.XmlElement(IsNullable = true)]
26.  
    public string status { get; set; }
27.  
    [System.Xml.Serialization.XmlElement(IsNullable = true)]
28.  
    public decimal? lng { get; set; }
29.  
    [System.Xml.Serialization.XmlElement(IsNullable = true)]
30.  
    public decimal? lat { get; set; }
31.  
    }