In article <481222.60726...@web30401.mail.mud.yahoo.com>,
Sankaranarayanan <loony...@yahoo.com> writes:
> For validating the fields in Custom UI for empty / null values - I am calling
a Custom action on "DoAction" event of the Next Button and spawing a new dialo
g if all the input values are correctly entered.
>
> Incase of any blank values - I popup a message box from the custom action cod
e to notify the user but I am not able to set the focus back to the erroring fi
eld.
>
> Is there a way to set the focus from the Next Button to the erroring field fr
om the Custom action code.
You have several choices. First, you can rearrange things with one
required field per dialog so that its always clear which field needs a
value.
Second, you can keep all the fields on the same dialog, but not enable
the Next button until all the requirements are met (control properties are
not empty) and use a text control (initially showing no text) that holds
the error message. An additional text control can be placed next to the
offending fields so that an asterisk or other marker can be displayed
next to fields needing attention.
Your "DoAction" on the next button will probably need to work around
the fact that Windows Installer doesn't recognize property changes
correctly inside a DoAction attached to a button. See my blog post on
UI custom action guidelines:
<http://legalizeadulthood.wordpress.com/2009/10/23/ui-custom-action-guidelines/>
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