microsoft.public.dotnet.framework.aspnet.webcontrols

Andy Smith

1/22/2003 9:19:00 PM

here's an example in c# for the second one

String myOnFocus = getOnFocusScript();
String originalOnFocus = this.Attributes["onfocus"];
if (originalOnFocus != null) {
myOnFocus = originalOnFocus + " " + myOnFocus;
}
this.Attributes["onfocus"] = myOnFocus;

this should work.

"Christer" <winterdk@hotmail.com> wrote in message
news:7beadfe3.0301210324.3909f96b@posting.google.com...
> Hi all!
>
> I'm a situation, where I want to inherit from
> System.Web.UI.Webcontrols.Textbox. In this new inherited textbox, I
> want to add some javascript code on the onFocus event. No problem, I
> do so by using AddAttribute on the HTMLTextWriter before rendering my
> base class.
>
> Now, I want create yet another textbox, that extends my new textbox
> with more functionality... but, the functionality also uses onFocus.
> So, I have use AddAttribute in this scope too.
>
> The inheritance result is this
> System.Web.UI.Webcontrols.Textbox -> MyTextBox1 (adds OnFocus script)
> -> MyTextBox1 (adds (more) OnFocus script)
>
> When I do this, it results in TWO onFocus attributes in the html
> output. Does any of you know how to "append" to an existing attribute,
> if it exists among the attributes, that haven't been written to a html
> element yet? The situation above is simplified - the real one
> justifies that the two are not implemented in the same class.
>
> Thanks in advance.
>
> Christer