Exception Field not found: 'System.Runtime.Serialization.XmlObjectSerializerContext.serializerKnownDataContracts'.

Sat, 14 Jun 2008 00:45:35 Z

Hi All,

I am calling a business layer method call as below:

List<UsageCategorySummary> prodUsageCategorySummary = ProductDomain.Instance.GetUsageCategories();

hidUsageCategory.Value = this.JsonSerializerHelper(prodUsageCategorySummary);

Helper function code

private string JsonSerializerHelper(System.Object objRef)

{

string result = string.Empty;

using (MemoryStream memoryStream = new MemoryStream())

{

DataContractJsonSerializer serializer = new DataContractJsonSerializer(objRef.GetType());

// Resulting to an exception...

// // Exception Field not found: 'System.Runtime.Serialization.XmlObjectSerializerContext.serializerKnownDataContracts'.
serializer.WriteObject(memoryStream, objRef);
memoryStream.Position = 0;

using (StreamReader streamReader = new StreamReader(memoryStream))

{

result = streamReader.ReadToEnd();

}

return result;

}

Exception occurring at the above colored line... any thoughts?!

HydPhani

Exception Field not found: 'System.Runtime.Serialization.XmlObjectSerializerContext.serializerKnownDataContracts'.

Sat, 14 Jun 2008 09:15:23 Z

Sorry, but what exactly is the execption (namespace.type) and what is the exact exception message?

/Calle

Exception Field not found: 'System.Runtime.Serialization.XmlObjectSerializerContext.serializerKnownDataContracts'.

Sun, 15 Jun 2008 00:21:13 Z

Seems like your object cannot be serialized. This can happen if you have a child List collection.
See http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=302308&SiteID=1

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