MBR IT/.NET 247 : deserialize arraylist on microsoft.public.dotnet.framework

deserialize arraylist

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Greg (VIP)

I'm trying to deserialize an arraylist of string typed items. I have:
[XmlArrayItem ("client",typeof(System.String))]
public ArrayList sClient;

but it's giving me an invalid cast error when I try to deserialize the
class. It serialized from XML fine.
Any idea what's going on?

thanks,
Greg

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Jakob Christensen

Hey Greg,

An ArrayList is NOT the same thing as an array which is why you are getting
the invalid cast exception. If you remove the XmlArrayItem attribute it will
work.

HTH,
Jakob.

"Greg" wrote:

[Original message clipped]

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Greg (VIP)

Hi Jakob,

I tried using:
[XmlElement("client", typeof(System.String))]
public ArrayList sClient;

and :

[XmlElement("client", typeof(string))]
public ArrayList sClient;

but those did not work either. Same invalid cast error. I double checked
to make sure the values are strings. Any other ideas?

thanks,
Greg

"Jakob Christensen" wrote:

[Original message clipped]

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Jakob Christensen

Hey Greg,

Sounds weird. Have you checked the generated XML file to see if any of the
elements are non-strings?

Anyway, if your arraylist only contains strings the serialization works even
without the XmlElementAttribute applied. The XmlSerializer will figure out
that all elements are strings. If this does not work it means that somewhere
you are inserting an element that is not a string. Actually, it seems to me
that the XmlElementAttribute is largely ignored in your case.

I tried this sample and it works fine though:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconcontrollingserializationbyxmlserializerwithattributes.asp

Regards, Jakob.

"Greg" wrote:

[Original message clipped]

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Greg (VIP)

I don't know ... can't get it to work. I ended up just changing the
Arraylist to a collection of strings and it works with no other changes. Go
figure.

"Jakob Christensen" wrote:

[Original message clipped]

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	System.Collections.ArrayList
	System.String
	System.Xml.Serialization.XmlElementAttribute
	System.Xml.Serialization.XmlSerializer
	System.Xml.XmlElement

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