Hi, I have been looking at the demo version 2.5 and using VS2005. I am trying to follow the Adapter tutorials whilst using my own database tables from SQL 2005. The runtime SD.LLBLGen.Pro.ORMSupportClasses.NET20.dll lib version is 2.5.7.1119 I have a windows console with the following code:

       static void Main(string[] args)
        {
            RelationPredicateBucket filter = new RelationPredicateBucket();
            EntityCollection<SpmcustomersEntity> customers = new EntityCollection<SpmcustomersEntity>();

            // [C#]
            StreamWriter writer = new StreamWriter("customer.XML");
            string customerXml = String.Empty;
            customers.WriteXml(out customerXml);
            writer.Write(customerXml);
            writer.Close();

            // now read it back
            StreamReader reader = new StreamReader("customer.XML");
            string xmlFromFile = reader.ReadToEnd();
            reader.Close();
            SpmcustomersEntity customerFromXml = new SpmcustomersEntity();
            customerFromXml.ReadXml(xmlFromFile);
        }

The code causes an exception when trying to read back the xml file with the following exception:

System.NullReferenceException was unhandled Message="Object reference not set to an instance of an object." Source="SD.LLBLGen.Pro.ORMSupportClasses.NET20" StackTrace: at SD.LLBLGen.Pro.ORMSupportClasses.EntityBase2.Xml2Entity(XmlNode node, Dictionary2 processedObjectIDs, List1 nodeEntityReferences) at SD.LLBLGen.Pro.ORMSupportClasses.EntityBase2.ReadXml(XmlNode node, XmlFormatAspect format) at SD.LLBLGen.Pro.ORMSupportClasses.EntityBase2.ReadXml(String xmlData) at ORMapperConsole.Program.Main(String[] args) in C:\Documents and Settings\Neil\My Documents\LLBLGen Pro Projects\ORMapperConsole\Program.cs:line 123 at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart()

Any idea what I have done wrong? I have attached the XML output.

Thank you in advance, Neil.

You have a type converter in the SpmcustomersEntity entity? Or is it a normal entity, with normal types and no type converter?

The code suggests the collection is empty, we'll have a look.

Hi,

I hadn't specified any type convertors when building the LLBLGen project. All fields should be normal DB types, either Int, Varchar, Float, Money or DateTime with no type convertors specified.

I see your mistake: you serialize a COLLECTION but you deserialize the xml in an ENTITY You can of course only deserialize collection xml into a new collection.

Thank you for sorting that out.

Sorry for troubling you with such a stupid question.