我需要将对象序列化为 XML 请求,但我正在调用的服务不接受空元素。
我从 XSD 生成了合同类,请求结构如下所示:
/* Generated contracts - simplified & without XML attributes */
public class Request
{
public Request()
{
filters = new RequestFilters();
properties = new ResultProperties();
}
public RequestFilters filters { get; set; }
public ResultProperties properties { get; set; }
}
public class ResultProperties
{
public ResultProperties()
{
props = new List<string>();
}
public List<string> props { get; set; }
}
public class RequestFilters
{
public RequestFilters()
{
ids = new LongFilter();
names = new StringFilter();
}
public LongFilter ids { get; set; }
public StringFilter names { get; set; }
}
public class LongFilter
{
public LongFilter()
{
values = new List<long>();
}
public List<long> values { get; set; }
}
public class StringFilter
{
public StringFilter()
{
values = new List<string>();
}
public List<string> values { get; set; }
}
对于代码生成,我使用了 xsd2code并将其配置为从序列化中排除空集合。创建对象时
Request request = new Request();
ResultProperties rp = new ResultProperties();
rp.props.Add("foo");
rp.props.Add("bar");
request.properties = rp;
我可以将其序列化为 XML:
<?xml version="1.0" encoding="utf-16"?>
<Request xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<filters>
<ids />
<names />
</filters>
<properties>
<props>
<string>foo</string>
<string>bar</string>
</props>
</properties>
</Request>
但是后端服务抱怨空<ids />
和<names />
元素。
是否有首选/任何方式从序列化 XML 中排除这些空元素?
如果我设法排除<ids />
and <names />
,最终我也想摆脱<filters>
元素。谢谢。
更新:添加了 XSD 的相关部分
<xs:schema>
<xs:element name="Request">
<xs:complexType>
<xs:sequence>
<xs:element name="filters" type="ouext:RequestFilters" minOccurs="0" />
<xs:element name="properties" type="ouext:ResultProperties" minOccurs="0" />
</xs:sequence>
</xs:complexType>
<xs:complexType name="RequestFilters">
<xs:sequence>
<xs:element name="ids" type="filters:LongFilter" minOccurs="0" />
<xs:element name="names" type="filters:StringFilter" minOccurs="0" />
<xs:sequence>
</xs:complexType>
<xs:complexType name="LongFilter">
<xs:sequence>
<xs:element name="values" type="filters:LongInFilter" minOccurs="0" />
</xs:sequence>
</xs:complexType>
<xs:complexType name="LongInFilter">
<xs:sequence>
<xs:element name="value" type="xs:long" minOccurs="0" maxOccurs="20000" />
</xs:sequence>
</xs:complexType>
<xs:complexType name="StringFilter">
<xs:sequence>
<xs:element name="values" type="filters:StringInFilter" minOccurs="0" />
</xs:sequence>
</xs:complexType>
<xs:complexType name="StringInFilter">
<xs:sequence>
<xs:element name="value" type="xs:string" minOccurs="0" maxOccurs="20000" />
</xs:sequence>
</xs:complexType>
<xs:complexType name="ResultProperties">
<xs:sequence>
<xs:element name="props" type="filters:StringInFilter" minOccurs="0" maxOccurs="unbounded">
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
更新:序列化完成如下
string xmlPayload = null;
XmlSerializer serializer = new XmlSerializer(typeof(Request));
using (StringWriter sw = new StringWriter())
{
using (XmlWriter xw = XmlWriter.Create(sw))
{
serializer.Serialize(xw, payload); // payload is initialized object of Request type
xmlPayload = sw.ToString();
}
}