数据契约中的 IsReference 属性 [英] IsReference property in data contract

问题描述

DataContract 中 IsReference 属性的用途是什么?应用此属性后，请求和响应有何不同?

What is the purpose of IsReference property in DataContract? How does the request and response vary with this property applied?

推荐答案

它决定了对象如何序列化，默认情况下，IsReference=false.

It determines how objects are serialized, by default, IsReference=false.

设置 IsReference = true 允许序列化可以相互引用的对象树.因此，对于 Employees 的列表，每个列表都有一个 Manager 的属性(他也是 Employee)，一个对 Manager 的引用可以保留每个 Employee 的 而不是将 Manager 嵌入到每个 Employee 节点中:

Setting IsReference = true allows the serialization of trees of objects that can reference each other. So with a list of Employees that each have a property for Manager (who is also an Employee), a reference to the Manager for each Employee can be held rather than embedding the Manager within each Employee node:

IsReference=false 会产生:

<Employee> 
      <Manager i:nil="true" /> 
      <Name>Kenny</Name> 
</Employee> 
<Employee> 
      <Manager> 
            <Manager i:nil="true" /> 
            <Name>Kenny</Name> 
      </Manager>  
      <Name>Bob</Name> 
</Employee> 
<Employee> 
      <Manager> 
            <Manager i:nil="true" /> 
            <Name>Kenny</Name> 
      </Manager>  
      <Name>Alice</Name> 
</Employee> 

其中 IsReference=true 会产生:

<Employee z:Id="i1" xmlns:z="http://schemas.microsoft.com/2003/10/Serialization/"> 
      <Manager i:nil="true" />  
      <Name>Kenny</Name> 
</Employee> 
<Employee z:Id="i2" xmlns:z="http://schemas.microsoft.com/2003/10/Serialization/"> 
      <Manager z:Ref="i1" />  
      <Name>Bob</Name> 
</Employee> 
<Employee z:Id="i3" xmlns:z="http://schemas.microsoft.com/2003/10/Serialization/"> 
      <Manager z:Ref="i1" />  
      <Name>Alice</Name> 
</Employee> 

摘自此网络日志 有完整的解释以及应用了属性的生成的 XML 的示例.

Snippets taken from this weblog that has a full explanation along with examples of the generated XML with the property applied.

MSDN - IsReference 属性提供详细信息以及互操作对象引用.

MSDN - IsReference Property provides details as well as Interoperable Object References.

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