DataTable saved to Session state loses event handlers

Question

I have a DataTable from a strongly-typed DataSet that has an event handler on the TableNewRow event (to initialize some date fields)

When I save this table into Session state, the event handler fires normally until the table's serialized. On subsequent requests when I retrieve the table from Session state, the event handler no longer fires.

Is this normal behavior, and I'm expected to rewire the event handlers on deserialize? If so, since there's no way to check whether the event handler has been added, what is the proper hook for doing the rewiring?

Can you post some relevant code? – Bryan Crosby Mar 23 '12 at 06:05 — Bryan Crosby, Mar 23 '12 at 06:05

score 1 · Accepted Answer · edited May 23 '17 at 10:08

1

Depending on your serialization, you can try to set the eventhandler through OnDeserialized attribute https://stackoverflow.com/a/4172266/1236044

For Xml serialization, maybe you can try something like this :

public override void ReadXml (XmlReader reader)
{
    base.ReadXml(reader);
    NewRow+=....
}

edited May 23 '17 at 10:08

Community

1
1

answered Mar 23 '12 at 09:40

jbl

15,179
3
34
101

score 0 · Answer 2 · edited Jan 22 '13 at 03:08

0

How do you store your session state? If it anything other than InProc, then all your objects are serialized and saved to some database. Then they are read from deserialized. This way you lose event subscriptions.

edited Jan 22 '13 at 03:08

xpda

15,585
8
51
82

answered Mar 23 '12 at 07:31

Vladimir Perevalov

4,059
18
22

Is there a simple way to dump objects with events / handlers to the session when using DB session state? – Tomas Beblar Feb 09 '18 at 23:11

DataTable saved to Session state loses event handlers

2 Answers2

Linked