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嘗試序列化類似聯合的數據類型。有一個枚舉字段,指示聯合中存儲的數據類型以及各種可能的字段類型。如何根據WCF中的內容自定義數據序列化?
想要的結果是DataContractSerializer
產生的XML只包含枚舉和相關的字段。
可能的解決方案,其中沒有一個已經嘗試呢,主要有:
- 使用自定義序列化和標記與自定義屬性,類似於this question工會性質。自定義序列化器會去除不需要的成員。
- 使用ISerializationSurrogate並序列化一個包含相關數據的不同對象。
- 不要在聯合中使用單獨的字段,請使用一個對象字段(這可以用作ISerializationSurrogate方法實施的一部分)。
- 其他...?
例如:
[DataContract]
public class WCFTestUnion
{
public enum EUnionType
{
[EnumMember]
Bool,
[EnumMember]
String,
[EnumMember]
Dictionary,
[EnumMember]
Invalid
};
EUnionType unionType = EUnionType.Invalid;
bool boolValue = true;
string stringValue = "Hello";
IDictionary<object, object> dictionaryValue = null;
// Could use custom attribute here ?
[DataMember]
public bool BoolValue
{
get { return this.boolValue; }
set { this.boolValue = value; }
}
// Could use custom attribute here ?
[DataMember]
public string StringValue
{
get { return this.stringValue; }
set { this.stringValue = value; }
}
// Could use custom attribute here ?
[DataMember]
public IDictionary<object, object> DictionaryValue
{
get { return this.dictionaryValue; }
set { this.dictionaryValue = value; }
}
[DataMember]
public EUnionType UnionType
{
get { return this.unionType; }
set { this.unionType = value; }
}
} // Ends class WCFTestUnion
測試
class TestSerializeUnion
{
internal static void Test()
{
Console.WriteLine("===TestSerializeUnion.Test()===");
WCFTestUnion u = new WCFTestUnion();
u.UnionType = WCFTestUnion.EUnionType.Dictionary;
u.DictionaryValue = new Dictionary<object, object>();
u.DictionaryValue[1] = "one";
u.DictionaryValue["two"] = 2;
System.Runtime.Serialization.DataContractSerializer serialize = new System.Runtime.Serialization.DataContractSerializer(typeof(WCFTestUnion));
System.IO.Stream stream = new System.IO.MemoryStream();
serialize.WriteObject(stream, u);
stream.Seek(0, System.IO.SeekOrigin.Begin);
byte[] buffer = new byte[stream.Length];
int length = checked((int)stream.Length);
int read = stream.Read(buffer, 0, length);
while (read < stream.Length)
{
read += stream.Read(buffer, 0, length - read);
}
string xml = Encoding.Default.GetString(buffer);
System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
doc.LoadXml(xml);
System.Xml.XmlTextWriter xmlwriter = new System.Xml.XmlTextWriter(Console.Out);
xmlwriter.Formatting = System.Xml.Formatting.Indented;
doc.WriteContentTo(xmlwriter);
xmlwriter.Flush();
Console.WriteLine();
}
} // Ends class TestSerializeUnion
輸出:
<WCFTestUnion xmlns="http://schemas.datacontract.org/2004/07/WCFTestServiceContracts" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<BoolValue>true</BoolValue>
<DictionaryValue xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<a:KeyValueOfanyTypeanyType>
<a:Key i:type="b:int" xmlns:b="http://www.w3.org/2001/XMLSchema">1</a:Key>
<a:Value i:type="b:string" xmlns:b="http://www.w3.org/2001/XMLSchema">one</a:Value>
</a:KeyValueOfanyTypeanyType>
<a:KeyValueOfanyTypeanyType>
<a:Key i:type="b:string" xmlns:b="http://www.w3.org/2001/XMLSchema">two</a:Key>
<a:Value i:type="b:int" xmlns:b="http://www.w3.org/2001/XMLSchema">2</a:Value>
</a:KeyValueOfanyTypeanyType>
</DictionaryValue>
<StringValue>Hello </StringValue>
<UnionType>Dictionary</UnionType>
</WCFTestUnion>
所需的輸出(僅使用場被串行化,用枚舉一起):
<WCFTestUnion xmlns="http://schemas.datacontract.org/2004/07/WCFTestServiceContracts" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<DictionaryValue xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<a:KeyValueOfanyTypeanyType>
<a:Key i:type="b:int" xmlns:b="http://www.w3.org/2001/XMLSchema">1</a:Key>
<a:Value i:type="b:string" xmlns:b="http://www.w3.org/2001/XMLSchema">one</a:Value>
</a:KeyValueOfanyTypeanyType>
<a:KeyValueOfanyTypeanyType>
<a:Key i:type="b:string" xmlns:b="http://www.w3.org/2001/XMLSchema">two</a:Key>
<a:Value i:type="b:int" xmlns:b="http://www.w3.org/2001/XMLSchema">2</a:Value>
</a:KeyValueOfanyTypeanyType>
</DictionaryValue>
<UnionType>Dictionary</UnionType>
</WCFTestUnion>
我已經與數據合同代理商一起,他們已經非常乾淨地工作。忘了回來這個問題,但。 已經看過解析器,但並不認爲這是正確的路要走。沒有看到IObjectReference,所以非常感謝。 – WaffleSouffle 2012-05-01 13:34:34