WebJan 17, 2008 · WCF Data Contract 之 KnownType. LazyBee. 1 使用场合：. 在 WCF Data Contract 中如果存在向下造型的情况时你就会用到 KnownTypeAttribute 类以保证在反序列化时引擎能知道应该使用哪个具体的类型。 主要有以下几种典型的情况： 1 发送的数据契约类型是从接收端期望接收的数据契约类型继承的。
Tipos conocidos de contratos de datos - WCF Microsoft Learn
WebSep 29, 2011 · 1 Answer. [KnownType (...)] is not enough, as the library also need a unique (for that type) integer to use as the key (the 1 in the example). Inferring it qutomatically is too risky, as it could cause unexpected breaks when tweaking the type (and version safety is a very deliberate design goal). If you don't want to add an attribute for this ... Web5. The DataContractSerializer needs to know about the concrete types that is might return. An interface cannot be serialized, as it cannot be deserialized (how can you create an instance of an interface without a concrete implementation). The simple resolution is to add KnownTypes attribute like below: celery flakes
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WebJun 23, 2012 · The config above corresponds to the [KnownType] attribute used on DataContracts. There appears to be no way to implement [ServiceKnownType] in the config. An alternate approach is to use [ServiceKnownType(methodName, type)] attribute with a custom configuration section. The new config looks like this: WebMar 20, 2009 · I just wrote a WCF Service to return Person information. My implementation is as shown below // Serice Contract [ServiceContract] public interface IPersonService { [OperationContract] PersonCollection GetPersonByPersonID(int personID); } // [Service Implementation ] public PersonCollection ... · Trying to mix OO and contract definition … WebFeb 2, 2010 · KnownTypeAttribute与ServiceKnownTypeAttribute 对于已知类型，可以通过两个特殊的自定义特性进行设置：KnownTypeAttribute和 ServiceKnownTypeAttribute。 … buy bioshock the collection pc