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PODataContract Known Types - passing array
 

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  1. PODataContract Known Types - passing array
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    <p>Im having problems when passing an generic List, trough a WCF operation. In this case, there is a List of int. The example 4 is described <a href="http://msdn.microsoft.com/en-us/library/ms730167%28v=VS.90%29.aspx" rel="nofollow noreferrer">here in MSDN</a>. Note that in MSDN sample, is described: </p> <blockquote> <p>// This will serialize and deserialize successfully because the generic List is equivalent to int[], which was added to known types.</p> </blockquote> <p>Above, is the DataContract:</p> <pre><code> [DataContract] [KnownType(typeof(int[]))] [KnownType(typeof(object[]))] public class AccountData { [DataMember] public object accNumber1; [DataMember] public object accNumber2; [DataMember] public object accNumber3; [DataMember] public object accNumber4; } </code></pre> <p>In client side, Im calling the operation like this:</p> <pre><code>DataTransfer.Service.AccountData data = new DataTransfer.Service.AccountData() { accNumber1 = 100, accNumber2 = new int[100], accNumber3 = new List&lt;int&gt;(), accNumber4 = new ArrayList() }; cService.AddAccounts(data); </code></pre> <p>Also, here is the decorations of the generated AccountData obj (WCF proxy):</p> <pre><code>[System.Diagnostics.DebuggerStepThroughAttribute()] [System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "3.0.0.0")] [System.Runtime.Serialization.DataContractAttribute(Name="AccountData", Namespace="http://schemas.datacontract.org/2004/07/DataTransfer.Service")] [System.SerializableAttribute()] [System.Runtime.Serialization.KnownTypeAttribute(typeof(DataTransfer.Client.CustomerServiceReference.PurchaseOrder))] [System.Runtime.Serialization.KnownTypeAttribute(typeof(DataTransfer.Client.CustomerServiceReference.Customer))] [System.Runtime.Serialization.KnownTypeAttribute(typeof(int[]))] [System.Runtime.Serialization.KnownTypeAttribute(typeof(object[]))] </code></pre> <p>The exception is: </p> <blockquote> <p>There was an error while trying to serialize parameter <a href="http://tempuri.org/:myEntity" rel="nofollow noreferrer">http://tempuri.org/:myEntity</a>. The InnerException message was 'Type Generic List' with data contract name 'ArrayOfint:<a href="http://schemas.microsoft.com/2003/10/Serialization/Arrays" rel="nofollow noreferrer">http://schemas.microsoft.com/2003/10/Serialization/Arrays</a>' is not expected. Add any types not known statically to the list of known types</p> </blockquote>
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    1. USErup
    1. USErup
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      1. USMas
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    1. COwhat exactly is the problem?
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      1. USVitalik
    2. COSorry, I added the exception description now. Note that it already includes the KnownTypeAttribute as specified in the DataContract.
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    3. COI'm running into the same problem. You can't add int[] and List<int> to the known types because it will throw an error complaining that they are the same. However, if I just add int[], a serialization exception will be thrown for List<int>. Strange....
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