Wow, now I just stumbled upon something rather confusing. I discovered one of my screens was deleting records by default (confirmation prompt of course) when users pressed ENTER so I went to set the DefaultButton to something more appropriate. While I was at it, why not set the DefaultFocus too? So I added the following code:
Page.Form.DefaultButton = btnComponentSearch.UniqueID
Page.Form.DefaultFocus = txtComponentName.UniqueID
That fixed the button, but the focus wasn’t working so I changed focus to
Page.Form.DefaultFocus = txtComponentName.ClientID
To my surprise it worked! Then I thought…what happens if I change the DefaultButton:
Page.Form.DefaultButton = btnComponentSearch.ClientID
That resulted in the following error:
The DefaultButton of 'form1' must be the ID of a control of type IButtonControl.
So it could no longer find the control, how confusing…until I read this article about Naming:
Rendered name attributes correspond to UniqueID property and id attribute to ClientID property.
So gist is: VB.Net understands UniqueID, but for Javascript-ish stuff, you’ll need ClientID (except for the DefaultButton – which uses both J ). Pretty crazy!
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1 comment:
Glad I found this post. A number of sources were telling me to use the UniqueId for DefaultFocus, but it just wasn't working.
I would never have thought to use ClientId.
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