Inherited DropDownList and asp:listitems

[Arthur Dent]

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.

[Gaurav Vaish \(www.EduJini.IN\)]

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 | [url]http://www.mastergaurav.org[/url]
[url]http://www.edujini.in[/url] | [url]http://webservices.edujini.in[/url]
-------------------


"Arthur Dent" <hitchhikersguideto-news@yahoo.com> wrote in message
news:%23aKId1JwGHA.4920@TK2MSFTNGP06.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.
>

[Arthur Dent]

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


"Gaurav Vaish (www.EduJini.IN)" <gaurav.vaish.nospam@nospam.gmail.com> wrote
in message news:uDF10bNwGHA.4416@TK2MSFTNGP03.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 | [url]http://www.mastergaurav.org[/url]
> [url]http://www.edujini.in[/url] | [url]http://webservices.edujini.in[/url]
> -------------------
>
>
> "Arthur Dent" <hitchhikersguideto-news@yahoo.com> wrote in message
> news:%23aKId1JwGHA.4920@TK2MSFTNGP06.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.
>>

>
>