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POWCF issues with KnownType for Dictionary
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  1. POWCF issues with KnownType for Dictionary
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    copied!<p>I have a service that implements the following DataMember:</p> <pre><code>[DataMember] public Dictionary&lt;string, List&lt;IOptionQueryResult&gt;&gt; QueryResultItems { get; set; } </code></pre> <p>I have the class "OptionQuerySingleResult" which inherits from IOptionQueryResult. Now, I understand that I need to make the OptionQueryResult type "known" to the Service and thus tried to add the KnownType in various ways:</p> <pre><code>[KnownType(typeof(Dictionary&lt;string, OptionQuerySingleResult[]&gt;))] [KnownType(typeof(Dictionary&lt;string, List&lt;OptionQuerySingleResult&gt;&gt;))] [KnownType(typeof(OptionQuerySingleResult)] </code></pre> <p>However, none of those approaches worked and on the client side I'm either getting that deserialization failed or the server simply aborted the request, causing a connection aborted error.</p> <p>Does anyone have an idea on what's the proper way to get this to work? I'd like to add that if I change the QueryResultItems definition to use the concrete type, instead of the interface, everything works just fine.</p> <p>Thanks,</p> <p>Tom</p> <p>Edit: The exception that I am getting is:</p> <p>Error in line 1 position 524. Element '<a href="http://schemas.microsoft.com/2003/10/Serialization/Arrays:anyType" rel="nofollow noreferrer">http://schemas.microsoft.com/2003/10/Serialization/Arrays:anyType</a>' contains data from a type that maps to the name ':OptionQuerySingleResult'. The deserializer has no knowledge of any type that maps to this name. Consider using a DataContractResolver or add the type corresponding to 'OptionQuerySingleResult' to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding it to the list of known types passed to DataContractSerializer.</p> <p>However, when I look at the client proxy that svcutil generates, "OptionQuerySingleResult" is definitely defined in it:</p> <pre><code>[System.Diagnostics.DebuggerStepThroughAttribute()] [System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "4.0.0.0")] [System.Runtime.Serialization.DataContractAttribute(Name="OptionQuerySingleResult", Namespace="")] [System.SerializableAttribute()] public partial class OptionQuerySingleResult : object, System.Runtime.Serialization.IExtensibleDataObject, System.ComponentModel.INotifyPropertyChanged </code></pre>
 

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