作者:​​jiankunking​​​ ​

.NET的类型可以分为两种:声明类型和真实类型。我们提倡面向接口的编程,对象的真实类型往往需要在运行时才能确定,在编程的时候往往只需要指明类型的声明类型,比如类型实现的接口或者抽象类。当我们使用基于接口或者抽象类创建的DataContractSerializer去序列化一个实现了该接口或者继承该抽象类的实例的时候,往往会因为对对象的真实类型无法识别造成不能正常地序列化。


/// <summary>
/// 动作信息
/// </summary>
[DataContract(Namespace = "javascript:void(0)")]
[KnownType("GetKnowTypes")]
//[KnownType("GetKnowTypesQuote")]
public class ActionInfo
{
private string actionName;
/// <summary>
/// 动作名称
/// </summary>
[DataMember]
public String ActionName
{
get { return actionName; }
set { actionName = value; }
}

private string actionId;
/// <summary>
/// 动作唯一标识
/// </summary>
[DataMember]
public String ActionId
{
get { return actionId; }
set { actionId = value; }
}

private Dictionary<string, ActionParameterInfo> actionParameters;
/// <summary>
/// 参数信息
/// </summary>
[DataMember]
public Dictionary<string, ActionParameterInfo> ActionParameters
{
get
{
if (actionParameters == null)
{
actionParameters = new Dictionary<string, ActionParameterInfo>();
}
return actionParameters;
}
set
{
actionParameters = value;
}
}
static Type[] GetKnowTypes()
{
return new Type[] { typeof(Dictionary<string, ActionParameterInfo>) };
}

//[DataMember]
//public object Quote;

//static Type[] GetKnowTypesQuote()
//{
// return new Type[] { typeof(Dictionary<string, int>) };
//}
}
/// <summary>
/// 动作参数
/// </summary>
//[DataContract(Namespace = "javascript:void(0)")]
[DataContract]
public class ActionParameterInfo
{
private bool parameterAllowDBNull;
/// <summary>
/// 参数是否允许为空
/// </summary>
//[DataMember(Name = "参数是否允许为空", Order = 2)]
[DataMember]
public bool ParameterAllowDBNull
{
get { return parameterAllowDBNull; }
set { parameterAllowDBNull = value; }
}

private ActionInfoParameterCategoryEnum parameterCategory;
/// <summary>
/// 参数分类
/// </summary>
//[DataMember(Name = "参数分类", Order = 3)]
[DataMember]
public ActionInfoParameterCategoryEnum ParameterCategory
{
get { return parameterCategory; }
set { parameterCategory = value; }
}

private object parameterValue;
/// <summary>
/// 参数值
/// </summary>
//[DataMember(Name = "参数值", Order = 1)]
[DataMember]
public object ParameterValue
{
get { return parameterValue; }
set { parameterValue = value; }
}


private string parameterCode;
/// <summary>
/// 参数编号(未添加DataMember标识)
/// </summary>
public string ParameterCode
{
get { return parameterCode; }
set { parameterCode = value; }
}
public enum ActionInfoParameterCategoryEnum
{
[Description("普通类型")]
CommonType = 0,
[Description("事件源")]
EventSource = 1,
[Description("事件参数")]
EventArgument = 2,
[Description("控件ID")]
ControlId = 3,
[Description("表单ID")]
FormId = 4
}

在代码中添加以下代码填充实体类:

ActionInfo ac = new ActionInfo();
ac.ActionId = "ActionId" + Guid.NewGuid().ToString();
ac.ActionName = "ActionName" + Guid.NewGuid().ToString();
ac.ActionParameters = new Dictionary<string, ActionParameterInfo>();
for (int i = 0; i < 2; i++)
{
ActionParameterInfo ap = new ActionParameterInfo();
ap.ParameterAllowDBNull = false;
ap.ParameterCategory = ActionInfoParameterCategoryEnum.CommonType;
ap.ParameterValue = Guid.NewGuid();
ac.ActionParameters.Add(ap.ParameterValue.ToString(), ap);
}

      测试序列化:

string ss = PubXmlSerializer<ActionInfo>.ToXMLString(ac);

生成的xml如下:


<ActionInfo xmlns="javascript:void(0)" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<ActionId>ActionIdb9da9159-068e-4cae-9810-5e2ca4f0a87f</ActionId>
<ActionName>ActionName70737f3b-1672-437e-8ad5-543038ac62b4</ActionName>
<ActionParameters xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<a:KeyValueOfstringActionParameterInfo0UA3f0ok>
<a:Key>4e059222-023f-40aa-b08e-42e377570092</a:Key>
<a:Value xmlns:b="http://schemas.datacontract.org/2004/07/SerializationDemo">
<b:ParameterAllowDBNull>false</b:ParameterAllowDBNull>
<b:ParameterCategory>CommonType</b:ParameterCategory>
<b:ParameterValue i:type="c:guid" xmlns:c="http://schemas.microsoft.com/2003/10/Serialization/">4e059222-023f-40aa-b08e-42e377570092</b:ParameterValue>
</a:Value>
</a:KeyValueOfstringActionParameterInfo0UA3f0ok>
<a:KeyValueOfstringActionParameterInfo0UA3f0ok>
<a:Key>5c528920-a7c6-4fc4-8632-a2f083d43676</a:Key>
<a:Value xmlns:b="http://schemas.datacontract.org/2004/07/SerializationDemo">
<b:ParameterAllowDBNull>false</b:ParameterAllowDBNull>
<b:ParameterCategory>CommonType</b:ParameterCategory>
<b:ParameterValue i:type="c:guid" xmlns:c="http://schemas.microsoft.com/2003/10/Serialization/">5c528920-a7c6-4fc4-8632-a2f083d43676</b:ParameterValue>
</a:Value>
</a:KeyValueOfstringActionParameterInfo0UA3f0ok>
</ActionParameters>
</ActionInfo>

从xml看到:

DataContractSerializer在默认的情况下采用了如下的序列化规则。
1、XML的根节点名称为数据契约类型的名称。
2、默认的命名空间采用的格式为  http://schemas.datacontract.org/2004/07/DataContractSerializerDemo (数据契约类型的命名空间)。
3、只有显示地应用了DataMemberAttributue特性的字段或属性才能作为数据成员参与序列化。
4、所有数据成员均以XML元素的形式被序列化。
5、序列化后数据成员在XML中的次序采用这样的规则:父类数据成员在前,子类数据成员在后;定义在同一个类型中的数据成员按照字母排序。

如果默认序列化后的xml结构不能满足我们的需求,则可以通过DataContractAttribute和DataMenmberAttribute这两个特性对其进行修正。在下面我们通过DataContractAttribute特性设置了数据契约的名称和命名空间,通过DataMenmberAttribute特性的Name属性为Name和Birthday两个属性设置不同于属性名称的数据成员名称,并通过Order控制数据成员的先后次序。

   修改ActionParameterInfo类:


/// <summary>
/// 动作参数
/// </summary>
[DataContract(Namespace = "javascript:void(0)")]
public class ActionParameterInfo
{
private bool parameterAllowDBNull;
/// <summary>
/// 参数是否允许为空
/// </summary>
[DataMember(Name = "参数是否允许为空", Order = 2)]
public bool ParameterAllowDBNull
{
get { return parameterAllowDBNull; }
set { parameterAllowDBNull = value; }
}

private ActionInfoParameterCategoryEnum parameterCategory;
/// <summary>
/// 参数分类
/// </summary>
[DataMember(Name = "参数分类", Order = 3)]
public ActionInfoParameterCategoryEnum ParameterCategory
{
get { return parameterCategory; }
set { parameterCategory = value; }
}

private object parameterValue;
/// <summary>
/// 参数值
/// </summary>
[DataMember(Name = "参数值", Order = 1)]
public object ParameterValue
{
get { return parameterValue; }
set { parameterValue = value; }
}


private string parameterCode;
/// <summary>
/// 参数编号(未添加DataMember标识)
/// </summary>
public string ParameterCode
{
get { return parameterCode; }
set { parameterCode = value; }
}

再次序列化,xml结构如下:

<ActionInfo xmlns="javascript:void(0)" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<ActionId>ActionIdd95e434d-4f13-49b7-859e-a7964f468d70</ActionId>
<ActionName>ActionNamef750900a-42fe-4586-9688-768cdefd4d78</ActionName>
<ActionParameters xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:Key>560e9e05-2c7d-482a-89f5-ea200bbe42b3</a:Key>
<a:Value>
<参数值 i:type="b:guid" xmlns:b="http://schemas.microsoft.com/2003/10/Serialization/">560e9e05-2c7d-482a-89f5-ea200bbe42b3</参数值>
<参数是否允许为空>false</参数是否允许为空>
<参数分类>CommonType</参数分类>
</a:Value>
</a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:Key>eac9bc48-be0c-4c36-92d0-8f392f010516</a:Key>
<a:Value>
<参数值 i:type="b:guid" xmlns:b="http://schemas.microsoft.com/2003/10/Serialization/">eac9bc48-be0c-4c36-92d0-8f392f010516</参数值>
<参数是否允许为空>false</参数是否允许为空>
<参数分类>CommonType</参数分类>
</a:Value>
</a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
</ActionParameters>
</ActionInfo>

有木有发现DataMember中Name与Order的作用啊

        小注:

对于一些比较复杂的类型无法序列化、反序列化(不能识别类型)的时候,就得考虑使用KnownTypeAttribute来标注可能涉及到的外部类型,但如果遇到像泛型这些较为复杂的类型,就要考虑在带数据协定的类中添加一个静态方法,该方法返回Type 的IEnumerable,一般是Type[]就可以了,而在KnownTypeAttribute的构造函数中使用这个方法的名字。

在该demo中将ActionInfo修改为如下形式(即去掉static Type[] GetKnowTypes()函数,直接标识属性类型)也是可以正常序列化反序列化的:

/// <summary>
/// 动作信息
/// </summary>
[DataContract(Namespace = "javascript:void(0)")]
//[KnownType("GetKnowTypes")]
//[KnownType("GetKnowTypesQuote")
[KnownType(typeof(Dictionary<string, ActionParameterInfo>))]
public class ActionInfo
{
private string actionName;
/// <summary>
/// 动作名称
/// </summary>
[DataMember]
public String ActionName
{
get { return actionName; }
set { actionName = value; }
}

private string actionId;
/// <summary>
/// 动作唯一标识
/// </summary>
[DataMember]
public String ActionId
{
get { return actionId; }
set { actionId = value; }
}

private Dictionary<string, ActionParameterInfo> actionParameters;
/// <summary>
/// 参数信息
/// </summary>
[DataMember]
public Dictionary<string, ActionParameterInfo> ActionParameters
{
get
{
if (actionParameters == null)
{
actionParameters = new Dictionary<string, ActionParameterInfo>();
}
return actionParameters;
}
set
{
actionParameters = value;
}
}
//static Type[] GetKnowTypes()
//{
// return new Type[] { typeof(Dictionary<string, ActionParameterInfo>) };
//}

//[DataMember]
//public object Quote;

//static Type[] GetKnowTypesQuote()
//{
// return new Type[] { typeof(Dictionary<string, int>) };
//}
}

修改实体类后的序列化xml如下:

<ActionInfo xmlns="javascript:void(0)" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<ActionId>ActionId394e78b1-0cad-4726-9d6d-6061b7082571</ActionId>
<ActionName>ActionName05ddd5d3-4c08-4bf9-ae7d-2166625dee94</ActionName>
<ActionParameters xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays">

<a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:Key>ebb9c44f-69c8-4a52-b59d-7cd8da066591</a:Key>
<a:Value>
<参数值 i:type="b:guid" xmlns:b="http://schemas.microsoft.com/2003/10/Serialization/">ebb9c44f-69c8-4a52-b59d-7cd8da066591</参数值>
<参数是否允许为空>false</参数是否允许为空>
<参数分类>CommonType</参数分类>
</a:Value>

</a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:Key>1a9f70f8-cf38-4644-a466-6afba99b8837</a:Key>

<a:Value>
<参数值 i:type="b:guid" xmlns:b="http://schemas.microsoft.com/2003/10/Serialization/">1a9f70f8-cf38-4644-a466-6afba99b8837</参数值>
<参数是否允许为空>false</参数是否允许为空>
<参数分类>CommonType</参数分类>
</a:Value>

</a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
</ActionParameters>
</ActionInfo>

  那可不可以去掉KnownType标识呢?答案是不可以的。

那么在ActionInfo类中是否可以定义两个已知类型呢?

经过测试验证,不能再同一个类中定义两个已知类型,比如:


WCF  序列化与反序列化复杂类型(DataContractSerializer)_反序列化

同时在类上标识:


WCF  序列化与反序列化复杂类型(DataContractSerializer)_复杂类型_02

错误信息如下:

---------------------------
---------------------------
System.Runtime.Serialization.InvalidDataContractException: 类型“SerializationDemo.ActionInfo”的 KnownTypeAttribute 特性指定一个名为“GetKnowTypes”的方法,以提供已知类型。此类型上找不到静态方法“GetKnowTypes()”。请确保此方法存在并标记为静态。
在 System.Runtime.Serialization.DataContract.DataContractCriticalHelper.ThrowInvalidDataContractException(String message, Type type)
在 System.Runtime.Serialization.DataContract.ImportKnownTypeAttributes(Type type, Dictionary`2 typesChecked, Dictionary`2& knownDataContracts)
在 System.Runtime.Serialization.DataContract.ImportKnownTypeAttributes(Type type)
在 System.Runtime.Serialization.ClassDataContract.ClassDataContractCriticalHelper.get_KnownDataContracts()
在 System.Runtime.Serialization.ClassDataContract.get_KnownDataContracts()
在 System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithoutXsiType(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, RuntimeTypeHandle declaredTypeHandle)
在 System.Runtime.Serialization.Json.DataContractJsonSerializer.InternalWriteObjectContent(XmlWriterDelegator writer, Object graph)
在 System.Runtime.Serialization.Json.DataContractJsonSerializer.InternalWriteObject(XmlWriterDelegator writer, Object graph)
在 System.Runtime.Serialization.XmlObjectSerializer.InternalWriteObject(XmlWriterDelegator writer, Object graph, DataContractResolver dataContractResolver)
在 System.Runtime.Serialization.XmlObjectSerializer.WriteObjectHandleExceptions(XmlWriterDelegator writer, Object graph, DataContractResolver dataContractResolver)
在 System.Runtime.Serialization.Json.DataContractJsonSerializer.WriteObject(XmlDictionaryWriter writer, Object graph)
在 System.Runtime.Serialization.Json.DataContractJsonSerializer.WriteObject(Stream stream, Object graph)
在 SerializationDemo.JsonSerializer.JsonStringSerializer[T](T t) 位置 E:\WorkSpace\WorkSpaceTest\SerializationDemo\SerializationDemo\JsonSerializer.cs:行号 29
---------------------------
确定
---------------------------

但是对于同一个类型,在一个类中可以有多个属性,比如:


WCF  序列化与反序列化复杂类型(DataContractSerializer)_WCF_03

填充实体类代码如下:


ActionInfo ac = new ActionInfo();
ac.ActionId = "ActionId" + Guid.NewGuid().ToString();
ac.ActionName = "ActionName" + Guid.NewGuid().ToString();
ac.ActionParameters = new Dictionary<string, ActionParameterInfo>();
for (int i = 0; i < 2; i++)
{
ActionParameterInfo ap = new ActionParameterInfo();
ap.ParameterAllowDBNull = false;
ap.ParameterCategory = ActionInfoParameterCategoryEnum.CommonType;
ap.ParameterValue = Guid.NewGuid();
ac.ActionParameters.Add(ap.ParameterValue.ToString(), ap);
}
ac.ActionParameters1 = new Dictionary<string, ActionParameterInfo>();
for (int i = 0; i < 2; i++)
{
ActionParameterInfo ap = new ActionParameterInfo();
ap.ParameterAllowDBNull = false;
ap.ParameterCategory = ActionInfoParameterCategoryEnum.CommonType;
ap.ParameterValue = Guid.NewGuid();
ac.ActionParameters1.Add(ap.ParameterValue.ToString(), ap);
}

序列化之后的xml如下:

<ActionInfo xmlns="javascript:void(0)" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<ActionId>ActionIded35fdb5-0c47-440e-9d6e-8dba364d49d5</ActionId>
<ActionName>ActionNamef991e495-7cc2-43a2-863f-4a9c139641b1</ActionName>
<ActionParameters xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:Key>aec5004a-79d3-4949-8c70-eb7605aa6702</a:Key>
<a:Value>
<参数值 i:type="b:guid" xmlns:b="http://schemas.microsoft.com/2003/10/Serialization/">aec5004a-79d3-4949-8c70-eb7605aa6702</参数值>
<参数是否允许为空>false</参数是否允许为空>
<参数分类>CommonType</参数分类>
</a:Value>
</a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:Key>d859df4f-1b82-4144-9f1b-3a4c01ff1a10</a:Key>
<a:Value>
<参数值 i:type="b:guid" xmlns:b="http://schemas.microsoft.com/2003/10/Serialization/">d859df4f-1b82-4144-9f1b-3a4c01ff1a10</参数值>
<参数是否允许为空>false</参数是否允许为空>
<参数分类>CommonType</参数分类>
</a:Value>
</a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
</ActionParameters>
<ActionParameters1 xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:Key>110478a6-a177-4dec-bc7f-77027bd30bd3</a:Key>
<a:Value>
<参数值 i:type="b:guid" xmlns:b="http://schemas.microsoft.com/2003/10/Serialization/">110478a6-a177-4dec-bc7f-77027bd30bd3</参数值>
<参数是否允许为空>false</参数是否允许为空>
<参数分类>CommonType</参数分类>
</a:Value>
</a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:Key>cdf8d367-dac4-4ae0-a6b7-d3de0f9fc92a</a:Key>
<a:Value>
<参数值 i:type="b:guid" xmlns:b="http://schemas.microsoft.com/2003/10/Serialization/">cdf8d367-dac4-4ae0-a6b7-d3de0f9fc92a</参数值>
<参数是否允许为空>false</参数是否允许为空>
<参数分类>CommonType</参数分类>
</a:Value>
</a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
</ActionParameters1>
</ActionInfo>

如果就是有多个复杂属性如何处理呢?

铛铛==》

[KnownType(typeof(Dictionary<string, ActionParameterInfo>))]
[KnownType(typeof(Dictionary<string, int>))]

        修改ActionInfo类为:

/// <summary>
/// 动作信息
/// </summary>
[DataContract(Namespace = "javascript:void(0)")]
//[KnownType("GetKnowTypes")]
//[KnownType("GetKnowTypesQuote")]
//[KnownType(typeof(Dictionary<string, ActionParameterInfo>))]

[KnownType(typeof(Dictionary<string, ActionParameterInfo>))]
[KnownType(typeof(Dictionary<string, int>))]
public class ActionInfo
{
private string actionName;
/// <summary>
/// 动作名称
/// </summary>
[DataMember]
public String ActionName
{
get { return actionName; }
set { actionName = value; }
}

private string actionId;
/// <summary>
/// 动作唯一标识
/// </summary>
[DataMember]
public String ActionId
{
get { return actionId; }
set { actionId = value; }
}

private Dictionary<string, ActionParameterInfo> actionParameters;
/// <summary>
/// 参数信息
/// </summary>
[DataMember]
public Dictionary<string, ActionParameterInfo> ActionParameters
{
get
{
if (actionParameters == null)
{
actionParameters = new Dictionary<string, ActionParameterInfo>();
}
return actionParameters;
}
set
{
actionParameters = value;
}
}
//private Dictionary<string, ActionParameterInfo> actionParameters1;
/ <summary>
/ 参数信息
/ </summary>
//[DataMember]
//public Dictionary<string, ActionParameterInfo> ActionParameters1
//{
// get
// {
// if (actionParameters1 == null)
// {
// actionParameters1 = new Dictionary<string, ActionParameterInfo>();
// }
// return actionParameters1;
// }
// set
// {
// actionParameters1 = value;
// }
//}
//static Type[] GetKnowTypes()
//{
// return new Type[] { typeof(Dictionary<string, ActionParameterInfo>) };
//}

[DataMember]
public Dictionary<string, int> Quote = new Dictionary<string, int>();


//static Type[] GetKnowTypesQuote()
//{
// return new Type[] { typeof(Dictionary<string, int>) };
//}
}

      填充实体的代码如下:

ActionInfo ac = new ActionInfo();
ac.ActionId = "ActionId" + Guid.NewGuid().ToString();
ac.ActionName = "ActionName" + Guid.NewGuid().ToString();
ac.ActionParameters = new Dictionary<string, ActionParameterInfo>();
for (int i = 0; i < 2; i++)
{
ActionParameterInfo ap = new ActionParameterInfo();
ap.ParameterAllowDBNull = false;
ap.ParameterCategory = ActionInfoParameterCategoryEnum.CommonType;
ap.ParameterValue = Guid.NewGuid();
ac.ActionParameters.Add(ap.ParameterValue.ToString(), ap);
}
//ac.ActionParameters1 = new Dictionary<string, ActionParameterInfo>();
//for (int i = 0; i < 2; i++)
//{
// ActionParameterInfo ap = new ActionParameterInfo();
// ap.ParameterAllowDBNull = false;
// ap.ParameterCategory = ActionInfoParameterCategoryEnum.CommonType;
// ap.ParameterValue = Guid.NewGuid();
// ac.ActionParameters1.Add(ap.ParameterValue.ToString(), ap);
//}

ac.Quote = new Dictionary<string, int>();
for (int i = 0; i < 2; i++)
{
string str = Guid.NewGuid().ToString();
int f = i;
((Dictionary<string, int>)ac.Quote).Add(str, f);
}

       序列化之后的结果为:

<ActionInfo xmlns="javascript:void(0)" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<ActionId>ActionIdb4df91db-7ba1-480f-bc6f-2dfa3eb27ae7</ActionId>
<ActionName>ActionName30be2364-53d6-429d-8ca4-61dd8928b779</ActionName>
<ActionParameters xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:Key>240b226f-8aa0-48e7-a24f-0640e2da7172</a:Key>
<a:Value>
<参数值 i:type="b:guid" xmlns:b="http://schemas.microsoft.com/2003/10/Serialization/">240b226f-8aa0-48e7-a24f-0640e2da7172</参数值>
<参数是否允许为空>false</参数是否允许为空>
<参数分类>CommonType</参数分类>
</a:Value>
</a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
<a:Key>73085803-8d35-4b52-a550-c354f0dae7a0</a:Key>
<a:Value>
<参数值 i:type="b:guid" xmlns:b="http://schemas.microsoft.com/2003/10/Serialization/">73085803-8d35-4b52-a550-c354f0dae7a0</参数值>
<参数是否允许为空>false</参数是否允许为空>
<参数分类>CommonType</参数分类>
</a:Value>
</a:KeyValueOfstringActionParameterInfoKdFY_PqWd>
</ActionParameters>
<Quote xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<a:KeyValueOfstringint>
<a:Key>d9298e16-e41f-4508-a7dc-6a26e137ec2d</a:Key>
<a:Value>0</a:Value>
</a:KeyValueOfstringint>
<a:KeyValueOfstringint>
<a:Key>1a53f746-60fe-4b0b-8c48-479693ad46fa</a:Key>
<a:Value>1</a:Value>
</a:KeyValueOfstringint>
</Quote>
</ActionInfo>

       

    可见,可以通过多个KnownType标识来实现同一个数据契约中多个复杂类型的序列化与反序列化。

此处是以两个字典类型来验证的,其实不管是list还是字典都可以通过:多个KnownType标识来实现同一个数据契约中多个复杂类型的序列化与反序列化。 

KnownType标识类简洁处理方式(这种方式不需要在类上标识KnownType):

List<Type> knownTypes = new List<Type>();
knownTypes.Add(typeof(Dictionary<string, ActionParameterInfo>));
knownTypes.Add(typeof(List<ActionParameterInfo>));

   

   然后调用:

DataContractSerializer<ActionInfo>.ToXMLString(ac, knownTypes);

         

即可


 

  DataContractJsonSerializer的用法与DataContractSerializer类似,只是两者对于实体类序列化后的存储形式不一样,仅此而已。

​C# WCF DataContractSerializer 类​

小注:

如果序列化list<baseclass>即需要序列化一个由baseclass类及其子类组成的集合的时候,需要在子类基类上加上标识


[KnownType(typeof(EndEvent))]
public class EndEvent:BpmnEvent


在反序列化的时候,调用:


public static T ReadFromXML(string xmlStr, IEnumerable<Type> knownTypes = null)

 传入子类基类的的Type





参考文章:

​WCF学习笔记——对象序列化​

​传说中的WCF(6):数据协定(b)​

​序列化和反序列化的几种方式(DataContractSerializer)(二)​

​关于复杂类型的序列化 ​