ComboBox for setting NULL to field among other values

[gmandelli]

Hello,
how is possible to have a field with a select combobox to set the underlaying database field with NULL value choose from one among of the combobox values?

So for example the combo has

1. Red
2. Green
3. NULL

the third selection set to null the database field.

In case of boolena type can be:

1. True
2. NULL

avoining false to be assigned to field.

How can this be reached with asp.net maker?

Many thanks.

Best regards,
John

[MichaelG]

If the field is NULLABLE, the first option (empty value) in the dropdown should already set the field to NULL.

[gmandelli]

Good. Right as suggested. Thank you.

Rgerds,
John