有时webapi在序列化xml时，可能需要给某些带有html或特殊字符（如 < > & /）的字段加上<![CDATA[]]> 已防止影响xml正常数据，如果使用.aspx视图那可直接在前台绑定字段时直接加入<![CDATA[]]>，webapi只有后台代码，那只能在后台做了，如下。
1 using System;
2 using System.Collections.Generic;
3 using System.IO;
4 using System.Net;
5 using System.Net.Http;
6 using System.Net.Http.Formatting;
7 using System.Threading.Tasks;
8 using System.Web.Http;
9 using System.Xml;
10 using System.Xml.Serialization;
11
12 namespace MvcApplication1.Controllers
13 {
14 public class TestController : ApiController
15 {
16 [HttpGet]
17 [HttpPost]
18 public HttpResponseMessage HouseTest(string city)
19 {
20 //手动构造数据，这里应该是调用构造数据。
21 var info = new GetHouseCountInfo()
22 {
23 CityName = "北京",
24 CountInfo = new List<CountInfo>()
25 {
26 new CountInfo()
27 {
28 Data = "2016-08-30",
29 HouseDetail = "描述信息1111等。。。"
30 },
31 new CountInfo()
32 {
33 Data = "2016-08-30",
34 HouseDetail = "描述信息2222等。。。"
35 },
36 new CountInfo()
37 {
38 Data = "2016-08-30",
39 HouseDetail = "描述信息333等。。。"
40 }
41 }
42 };
43 //序列化实体与赋值
44 var model = new HouseCountRoot {GetHouseInfo = new GetHouseCountInfo()};
45 model.GetHouseInfo.CountInfo = info.CountInfo;
46 model.Result = "";
47 model.Message = "";
48 model.GetHouseInfo.CityName = info.CityName;
49
50 return new HttpResponseMessage()
51 {
52 Content =
53 new ObjectContent<HouseCountRoot>(model, new CustomNamespaceXmlFormatter() {UseXmlSerializer = true},
54 new System.Net.Http.Headers.MediaTypeHeaderValue("application/xml") {CharSet = "utf-8"}),
55 StatusCode = HttpStatusCode.OK
56 };
57 }
58 }
59
60 [XmlRoot("houses")]
61 public class HouseCountRoot
62 {
63 [XmlElement("result")]
64 public string Result { get; set; }
65
66 [XmlElement("message")]
67 public string Message { get; set; }
68
69 [XmlElement("housecount")]
70 public GetHouseCountInfo GetHouseInfo { get; set; }
71 }
72
73 public class GetHouseCountInfo
74 {
75 /// <summary>
76 /// 城市名称
77 /// </summary>
78 [XmlElement("cityname")]
79 public string CityName { get; set; }
80
81 /// <summary>
82 /// 房源数信息
83 /// </summary>
84 [XmlElement("countinfo")]
85 public List<CountInfo> CountInfo { get; set; }
86 }
87
88 public class CountInfo
89 {
90 /// <summary>
91 /// 日期
92 /// </summary>
93 [XmlElement("data")]
94 public string Data { get; set; }
95
96 /// <summary>
97 /// 加<![CDATA[ ]]>数据字段
98 /// </summary>
99 [XmlIgnore] //方式1，这里属性设置忽略，把CDataContent设置为housedetail
100 public string HouseDetail { get; set; }
101
102 [XmlElement("housedetail")]
103 public XmlNode[] CDataContent
104 {
105 get
106 {
107 return new XmlNode[]
108 {
109 new XmlDocument().CreateCDataSection(HouseDetail)
110 };
111 }
112 set
113 {
114 HouseDetail =
115 value[0].Value;
116 }
117 }
118
119 //方式二，这里把CDataContent设置为housedetail
120 //[XmlElement("housedetail")]
121 //public XmlNode CDataContent
122 //{
123 // get
124 // {
125 // // 这种方式这里代码比上面的要多运行一定次数。
126 // XmlNode node = new XmlDocument().CreateNode(XmlNodeType.CDATA, "", "");
127 // node.InnerText = HouseDetail;
128 // return node;
129 // }
130 // set
131 // {
132 // HouseDetail
133 // = value.Value;
134 // } //省略则CDataContent不会被序列化
135 //}
136
137 //以下属性省略。。。。
138 }
139
140 /// <summary>
141 /// 去除xml命名空间的 序列化类
142 /// </summary>
143 public class CustomNamespaceXmlFormatter : XmlMediaTypeFormatter
144 {
145 public override Task WriteToStreamAsync(Type type, object value, Stream writeStream, HttpContent content,
146 TransportContext transportContext)
147 {
148 var xns = new XmlSerializerNamespaces();
149 foreach (var attribute in type.GetCustomAttributes(true))
150 {
151 var xmlRootAttribute = attribute as XmlRootAttribute;
152 if (xmlRootAttribute != null)
153 {
154 xns.Add(string.Empty, xmlRootAttribute.Namespace);
155 }
156 }
157
158 if (xns.Count == 0)
159 {
160 xns.Add(string.Empty, string.Empty);
161 }
162
163 var task = Task.Factory.StartNew(() =>
164 {
165 var serializer = new XmlSerializer(type);
166 serializer.Serialize(writeStream, value, xns);
167 });
168
169 return task;
170 }
171 }
172 }
结果如下。
1 <?xml version="1.0"?> 2 <houses> 3 <result /> 4 <message /> 5 <housecount> 6 <cityname>北京</cityname> 7 <countinfo> 8 <data>2016-08-30</data> 9 <housedetail><![CDATA[描述信息1111等。。。]]></housedetail> 10 </countinfo> 11 <countinfo> 12 <data>2016-08-30</data> 13 <housedetail><![CDATA[描述信息2222等。。。]]></housedetail> 14 </countinfo> 15 <countinfo> 16 <data>2016-08-30</data> 17 <housedetail><![CDATA[描述信息333等。。。]]></housedetail> 18 </countinfo> 19 </housecount> 20 </houses>
