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From: Steven on 2 Nov 2009 09:47
Hi guys

I'm trying to serialize a class that includes an ArrayList member. Here's
the class:

[Serializable]
public class InstantiationData
{
public string InstanceTaskAssignedTo;
public string InstanceMailMsg;
public DateTime InstanceDueDate;
public Approvers ADApproversGroup; // this is the ArrayList member //
}

All other members of this class serialize properly, but the Approvers member
(a class which implements IEnumerator) does not. I've set a breakpoint
immediately after the Serialize method is called and inspected the object
which looks like this:

<?xml version="1.0" ?>
<InstantiationData xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<InstanceTaskAssignedTo>cs_ap</InstanceTaskAssignedTo>
<InstanceMailMsg>Test message</InstanceMailMsg>
<InstanceDueDate>2009-11-09</InstanceDueDate>
<ADApproversGroup />
</InstantiationData>

As you can see, the ADApproversGroup node is empty when serialized, but the
class instance shows 2 elements in the arrayList.

I've read that when serializing, it helps to specify the type of object I'm
serializing which I've done as follows:

XmlSerializer serializer = new XmlSerializer(typeof(InstantiationData));

But this doesn't help. Any ideas how to serialize an ArrayList member of a
class?

Tks




From: Peter Duniho on 2 Nov 2009 13:52
Steven wrote:
> Hi guys
>
> I'm trying to serialize a class that includes an ArrayList member. Here's
> the class:
>
> [Serializable]
> public class InstantiationData
> {
> public string InstanceTaskAssignedTo;
> public string InstanceMailMsg;
> public DateTime InstanceDueDate;
> public Approvers ADApproversGroup; // this is the ArrayList member //
> }

If it's an ArrayList member, why is the type "Approvers"?

It's practically impossible to say without a concise-but-complete code
example. But, it should be obvious that to serialize a member of a
class, that member needs to be serializable, and if it's a collection,
the collection members need to be serializable.

Whether those are _sufficient_ conditions in your case, I can't say.
But for sure, they are necessary.

Pete
From: go on 3 Nov 2009 06:53
Hello Steven. Always when I want to serialize a type I start with
creating an xml-schema for the type and then (auto-)generate the
classes. I think it saves time and trouble.
///M

Steven skrev:
> Hi guys
>
> I'm trying to serialize a class that includes an ArrayList member. Here's
> the class:
>
> [Serializable]
> public class InstantiationData
> {
> public string InstanceTaskAssignedTo;
> public string InstanceMailMsg;
> public DateTime InstanceDueDate;
> public Approvers ADApproversGroup; // this is the ArrayList member //
> }
>
> All other members of this class serialize properly, but the Approvers member
> (a class which implements IEnumerator) does not. I've set a breakpoint
> immediately after the Serialize method is called and inspected the object
> which looks like this:
>
> <?xml version="1.0" ?>
> <InstantiationData xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns:xsd="http://www.w3.org/2001/XMLSchema">
> <InstanceTaskAssignedTo>cs_ap</InstanceTaskAssignedTo>
> <InstanceMailMsg>Test message</InstanceMailMsg>
> <InstanceDueDate>2009-11-09</InstanceDueDate>
> <ADApproversGroup />
> </InstantiationData>
>
> As you can see, the ADApproversGroup node is empty when serialized, but the
> class instance shows 2 elements in the arrayList.
>
> I've read that when serializing, it helps to specify the type of object I'm
> serializing which I've done as follows:
>
> XmlSerializer serializer = new XmlSerializer(typeof(InstantiationData));
>
> But this doesn't help. Any ideas how to serialize an ArrayList member of a
> class?
>
> Tks
>
>
>
>
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