I think the clearest method is probably selects with options:

value - display
NULL - not set (or similar)
1 - true/yes/on
0 - false/no/off

On Thu, Oct 20, 2011 at 12:06 PM, Carl Von Stetten
<[email protected]>wrote:

>
> I'm rewriting a CF application that stores its data in SQL Server (2005,
> moving to 2008R2 soon).  I have a number of bit datatype columns in my
> tables, which correspond to true/false or yes/no values in the application.
>  For some of these values, I need to track if they have not yet been set to
> either true or false.  On the database side, I can allow the columns to
> contain nulls (and apply a default constraint set to null), so the value in
> the column could be null, 0 or 1.
>
> On the application UI side, bit values are typically represented by
> checkboxes.  It seems to me that checkboxes can only clearly communicate two
> states.  I could use a set of radio buttons, and have neither radio button
> on by default (which would represent null values in the database).  Is this
> the best way, or are there alternatives?
>
> 

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