Custom Web Control and Default Height/Width

2 May 2006 7:45 PM

Sfw_Kris

Good afternoon,

I have begun creating a custom web control in .NET 2.0. I have overridden
the height and width attributes so that I can supply a DefaultValue that is
more appropriate to the control, however the control does not reflect this
default when dropped into the designer or when run up in a web page. I get
the sense that perhaps I'm not setting the DefaultValue attribute correctly,
or that I've missed some additional piece of coding that is required. I've
included an example of one of my properties below, note I also attempted
setting the DefaultValue as just an integer. Any suggestions?

Thanks.

[DefaultValue(typeof(Unit), "200px")]
public override Unit Height
{
    get
    {
        return this.pnlMain.Height;
    }
    set
    {
        this.pnlMain.Height = value;
    }
}

4 May 2006 6:15 AM

Kelly Leahy

You need to set the value of this property in your constructor as well.

The "DefaultValue" attribute only tells the IDE what default value the
control assumes will be set in the constructor, so that when the value is
equal to this default, it is not stored in the designer generated code.
However, you are still responsible for setting everything to the default
values in the constructor of your control.

Cheers,
Kelly

Show quoteHide quote

"Sfw_Kris" wrote:

> Good afternoon,
>
> I have begun creating a custom web control in .NET 2.0. I have overridden
> the height and width attributes so that I can supply a DefaultValue that is
> more appropriate to the control, however the control does not reflect this
> default when dropped into the designer or when run up in a web page. I get
> the sense that perhaps I'm not setting the DefaultValue attribute correctly,
> or that I've missed some additional piece of coding that is required. I've
> included an example of one of my properties below, note I also attempted
> setting the DefaultValue as just an integer. Any suggestions?
>
> Thanks.
>
> [DefaultValue(typeof(Unit), "200px")]
> public override Unit Height
> {
>     get
>     {
>         return this.pnlMain.Height;
>     }
>     set
>     {
>         this.pnlMain.Height = value;
>     }
> }

4 May 2006 2:35 PM

Sfw_Kris

Hi Kelly,

I must be having one of 'those' weeks. That makes perfect sense and works
like a charm, thank you very much for your help.

Kris

Show quoteHide quote

"Kelly Leahy" wrote:

> You need to set the value of this property in your constructor as well.
>
> The "DefaultValue" attribute only tells the IDE what default value the
> control assumes will be set in the constructor, so that when the value is
> equal to this default, it is not stored in the designer generated code.
> However, you are still responsible for setting everything to the default
> values in the constructor of your control.
>
> Cheers,
> Kelly
>
> "Sfw_Kris" wrote:
>
> > Good afternoon,
> >
> > I have begun creating a custom web control in .NET 2.0. I have overridden
> > the height and width attributes so that I can supply a DefaultValue that is
> > more appropriate to the control, however the control does not reflect this
> > default when dropped into the designer or when run up in a web page. I get
> > the sense that perhaps I'm not setting the DefaultValue attribute correctly,
> > or that I've missed some additional piece of coding that is required. I've
> > included an example of one of my properties below, note I also attempted
> > setting the DefaultValue as just an integer. Any suggestions?
> >
> > Thanks.
> >
> > [DefaultValue(typeof(Unit), "200px")]
> > public override Unit Height
> > {
> >     get
> >     {
> >         return this.pnlMain.Height;
> >     }
> >     set
> >     {
> >         this.pnlMain.Height = value;
> >     }
> > }