How to write a control that doesn't require a closing tag

[paul.hester@gmail.com]

Hi all,

I've built a custom control that won't contain any inner content. If I
derive the control from Control, then the VS editor will always add the
closing tag when I use the control. I can derive from UserControl and
it doesn't do this, but I'm not sure whether is the best way to do
this.

What is the correct way to make a control that is self-closing (i.e.
doesn't have a closing tag)?

Thanks,

Paul

[John Saunders]

<paul.hester@gmail.com> wrote in message
news:1158725719.344437.243950@k70g2000cwa.googlegr oups.com...

> Hi all,
>
> I've built a custom control that won't contain any inner content. If I
> derive the control from Control, then the VS editor will always add the
> closing tag when I use the control. I can derive from UserControl and
> it doesn't do this, but I'm not sure whether is the best way to do
> this.
>
> What is the correct way to make a control that is self-closing (i.e.
> doesn't have a closing tag)?

May I ask why you want to do this? You will need the closing tag for XHTML
compliance, or at least the closing slash:

<my:tag/>

John

[paul.hester@gmail.com]

Hi John,

I want the closing slash, just not the closing tags. When the designer
auto-closes tags, it sometimes appends a " />" and for others it'll
append a "</my:tag>".

I just wanted to know the correct way to write a control where the form
designer knows won't accept any inner content.

Thanks,

Paul

John Saunders wrote:

> <paul.hester@gmail.com> wrote in message
> news:1158725719.344437.243950@k70g2000cwa.googlegr oups.com...

> > Hi all,
> >
> > I've built a custom control that won't contain any inner content. If I
> > derive the control from Control, then the VS editor will always add the
> > closing tag when I use the control. I can derive from UserControl and
> > it doesn't do this, but I'm not sure whether is the best way to do
> > this.
> >
> > What is the correct way to make a control that is self-closing (i.e.
> > doesn't have a closing tag)?

>
> May I ask why you want to do this? You will need the closing tag for XHTML
> compliance, or at least the closing slash:
>
> <my:tag/>
>
> John

[John Saunders]

<paul.hester@gmail.com> wrote in message
news:1158868445.348947.165500@m7g2000cwm.googlegro ups.com...

> Hi John,
>
> I want the closing slash, just not the closing tags. When the designer
> auto-closes tags, it sometimes appends a " />" and for others it'll
> append a "</my:tag>".
>
> I just wanted to know the correct way to write a control where the form
> designer knows won't accept any inner content.

I don't beleive this is possible with .NET 1.1. Maybe in 2.0, but I don't
know.

Will your control produce an error if there is inner content? Would inner
whitespace be ok?

John

[paul.hester@gmail.com]

The control won't throw an error - it just won't display any of the
inner content. I just wanted to emulate some of the existing server
control behaviour where it auto-closes with the "/>". I can achieve
this by deriving the control from UserControl, but I just thought
there'd be a better way of doing this.

Paul

John Saunders wrote:

> <paul.hester@gmail.com> wrote in message
> news:1158868445.348947.165500@m7g2000cwm.googlegro ups.com...

> > Hi John,
> >
> > I want the closing slash, just not the closing tags. When the designer
> > auto-closes tags, it sometimes appends a " />" and for others it'll
> > append a "</my:tag>".
> >
> > I just wanted to know the correct way to write a control where the form
> > designer knows won't accept any inner content.

>
> I don't beleive this is possible with .NET 1.1. Maybe in 2.0, but I don't
> know.
>
> Will your control produce an error if there is inner content? Would inner
> whitespace be ok?
>
> John

[John Saunders]

<paul.hester@gmail.com> wrote in message
news:1158959252.637568.50360@m7g2000cwm.googlegrou ps.com...

> The control won't throw an error - it just won't display any of the
> inner content. I just wanted to emulate some of the existing server
> control behaviour where it auto-closes with the "/>". I can achieve
> this by deriving the control from UserControl, but I just thought
> there'd be a better way of doing this.

Out of curiosity, which controls auto-close like this, other than user
controls?

John

[Gaurav Vaish \(www.EduJiniOnline.com\)]

> I want the closing slash, just not the closing tags. When the designer

> auto-closes tags, it sometimes appends a " />" and for others it'll
> append a "</my:tag>".

For your Control, have ToolboxData attribute with appropriate values.

eg:

[ToolboxData("{0}:ControlName runat='server />"]
public class MyCustomControl : Control
{
...
}


--
Happy Hacking,
Gaurav Vaish | [url]http://www.mastergaurav.com[/url]
[url]http://www.edujinionline.com[/url]
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