Inherited DropDownList and asp:listitems

Hi all,

I have a control which i wrote which inherits the asp:dropdownlist control.
Works great, all happy.
If when using it i try to declaratively add some items, it complains that
they are unknown types. eg...

<mytag:mydropdownlist id="lstInherited" runat="server"
appenddatabounditems="true" >
<asp:listitem id="" value="select an item" >
</mytag:mydropdownlist>

It complains that asp:listitem is an unknown element. How can i direct the
runtime that my dropdownlist
control can contain asp:listitems like its base class? I assume some sort of
attribute on the class, but i am
looking for any direction as to what attribute.
Thanks in advance,
- Arthur Dent.

Look into the following attribtue:
ParseChildrenAttribute (System.Web.UI)
PersistChildrenAttribute (System.Web.UI)

The child controls, by default, are not accepted.
You may also need to override AddedParsedSubObject method for type-safety of
the controls added.

--
Happy Hacking,
Gaurav Vaish | http://www.mastergaurav.org
http://www.edujini.in | http://webservices.edujini.in
-------------------


"Arthur Dent" <hitchhikersguideto-news (AT) yahoo (DOT) com> wrote

Hi all,

I have a control which i wrote which inherits the asp:dropdownlist
control. Works great, all happy.
If when using it i try to declaratively add some items, it complains that
they are unknown types. eg...

mytag:mydropdownlist id="lstInherited" runat="server"
appenddatabounditems="true"
asp:listitem id="" value="select an item"
/mytag:mydropdownlist

It complains that asp:listitem is an unknown element. How can i direct the
runtime that my dropdownlist
control can contain asp:listitems like its base class? I assume some sort
of attribute on the class, but i am
looking for any direction as to what attribute.
Thanks in advance,
- Arthur Dent.

Thanks for the tips....
I will check out those attribs/methods.
Cheers!


"Gaurav Vaish (www.EduJini.IN)" <gaurav.vaish.nospam (AT) nospam (DOT) gmail.com> wrote
in message news:uDF10bNwGHA.4416 (AT) TK2MSFTNGP03 (DOT) phx.gbl...

Look into the following attribtue:
ParseChildrenAttribute (System.Web.UI)
PersistChildrenAttribute (System.Web.UI)

The child controls, by default, are not accepted.
You may also need to override AddedParsedSubObject method for type-safety
of the controls added.

--
Happy Hacking,
Gaurav Vaish | http://www.mastergaurav.org
http://www.edujini.in | http://webservices.edujini.in
-------------------


"Arthur Dent" <hitchhikersguideto-news (AT) yahoo (DOT) com> wrote in message
news:%23aKId1JwGHA.4920 (AT) TK2MSFTNGP06 (DOT) phx.gbl...
Hi all,

I have a control which i wrote which inherits the asp:dropdownlist
control. Works great, all happy.
If when using it i try to declaratively add some items, it complains that
they are unknown types. eg...

mytag:mydropdownlist id="lstInherited" runat="server"
appenddatabounditems="true"
asp:listitem id="" value="select an item"
/mytag:mydropdownlist

It complains that asp:listitem is an unknown element. How can i direct
the runtime that my dropdownlist
control can contain asp:listitems like its base class? I assume some sort
of attribute on the class, but i am
looking for any direction as to what attribute.
Thanks in advance,
- Arthur Dent.