RuntimeType：HTTP：//schemas.datacontract.org/2004/07/System'预计不会 [英] RuntimeType:http://schemas.datacontract.org/2004/07/System' is not expected

问题描述

好了，所以我得到的DataContractSerializer与我的对象图的工作。看到我前面的问题了解更多信息。

的 http://stackoverflow.com/questions/736568/serialization-derialization-of-a-tree-structure

的http://stackoverflow.com/questions/736900 /在解串器 - 有 - 无knowlege-OF-任意类型的-映射到这个合同

不过，我的一个域， _UserPropertyDefinitions ，定义如下图所示。它定义了该用户可以在数据结构添加到自定义对象属性的列表。该字符串是一个独特的键来标识属性，Type是属性的类型始终是一颗灵长类动物的类型像BOOL，INT，弦乐等等等等。

每个对象都有一个对应的词典（字符串键，对象的值）集合来存储它为任何用户属性

<值pre> [数据成员]
私人字典<字符串类型> _UserPropertyDefinitions;


我的对象图连载罚款时，该属性是空集，但有一次我一个自定义属性添加到这个系列我在尝试用DataContractSerializer的序列化时，以下情况例外。

键入System.RuntimeType数据
合同名称
'RuntimeType： http://schemas.datacontract.org/2004/07/System '$预计不会b $ b的。添加任何类型的不
静态已知已知
类型的列表 - 例如，通过使用
KnownTypeAttribute属性或由
将它们添加到已知类型$ B $列表b传递给DataContractSerializer的。

如果我删除的数据成员属性，这个领域我可以序列化/与出反序列化得到一个例外，但当然我失去我已经在这个领域创建的设置。

解决方案

我敢肯定，键入不会序列化非常好 - 而且可能不会在数据合同属于无论如何，因为（具体是实现）它违背了一个数据合同的主要目标之一...

不过，我想到的最好的办法是换了一个词典<字符串，字符串> ，使用键入的 AssemblyQualifiedName 或全名。

Ok so I got DataContractSerializer working with my object graph. See my previous questions for more information.

http://stackoverflow.com/questions/736568/serialization-derialization-of-a-tree-structure

http://stackoverflow.com/questions/736900/the-deserializer-has-no-knowlege-of-any-type-that-maps-to-this-contract

However, one of my fields, _UserPropertyDefinitions, is defined as shown below.. It defines a list of custom properties that this user can add to objects in the data structure. The string is a unique key to identify the property, and Type is the type of the property which is always a primative type like Bool, Int, String etc etc..

Each object has a corresponding Dictionary(String key, Object value) collection to store the values it has set for any of the "User Properties"

[DataMember]
private Dictionary<string, Type> _UserPropertyDefinitions;

My object graph serializes fine when this property is an empty collection, yet once I add a custom property to this collection I get the following exception when trying to serialize with DataContractSerializer.

Type 'System.RuntimeType' with data contract name 'RuntimeType:http://schemas.datacontract.org/2004/07/System' is not expected. Add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer.

If I remove the DataMember attribute for this field the I can serialize/deserialize with out getting an exception, but of course I loose the settings I've created in this field.

解决方案

I'm pretty sure that Type isn't going to serialize very well - and arguably it doesn't belong in a data-contract anyway, since (being implementation specific) it defeats one of the main aims of a data-contract...

However, I expect the best approach would be to swap that for a Dictionary<string,string>, using the Type's AssemblyQualifiedName or FullName.

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