作者:jiankunking 出处:http://blog.csdn.net/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。
现在,我们定义两个带数据协定的类——ActionInfo和ActionParameterInfo:
/// <summary> /// 动作信息 /// </summary> [DataContract(Namespace = "http://blog.csdn.net/jiankunking")] [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 = "http://blog.csdn.net/jiankunking")] [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="http://blog.csdn.net/jiankunking" 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 = "http://blog.csdn.net/jiankunking")] 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="http://blog.csdn.net/jiankunking" 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 = "http://blog.csdn.net/jiankunking")] //[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="http://blog.csdn.net/jiankunking" 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:
同时在类上标识:
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:
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="http://blog.csdn.net/jiankunking" 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 = "http://blog.csdn.net/jiankunking")] //[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="http://blog.csdn.net/jiankunking" 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
序列化反序列化代码:点击打开链接
Demo代码下载:点击打开链接
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: