I have the same issue, but in VB.Net. In my attempts to solve it, I modified
the class as follows, but that didn't change the behavior:
<Serializable()> public class Fields
inherits ArrayList
implements ISerializable
private sString as String
private nInt as Int
public sub New()
end sub
public sub New( byval info as Serializationinfo, byval c as
streamingcontext)
' get variables from info
end sub
sub getobjectdata(byval info as Serializationinfo, byval c as
streamingcontext) implements Iserializable
'save variables to Info
end sub
end class
"leal ting" <le******@hotmail.com> wrote in message
news:uw**************@TK2MSFTNGP10.phx.gbl...
a class inherited from ArrayList,
is saved to ViewState,
why the type of the object read from ViewSate is not the class,
but the parent, ArrayList
[my email address le******@hotmail.com]
the class inherited from ArrayList
public class Fields: ArrayList
{
public Fields()
{}
}
Save to ViewState
this.ViewSate["FieldList"] = colFields;
when reading, it raises an error,
Fields colFields = (Fields)this.ViewSate["FieldList"]
the right type
ArrayList colFields = (ArrayLiist) this.ViewState["FieldList"];
why? how to solve it? and how to read it directly?
