hi, I have a problem in setting the drop down box which has 3 values, a, b and c.
initially, I don't want to set any default value, so I set AllowEmptySelection as true, but I also want it to set it a mandatory field which value must be selected and null value is not accepted. however, since I set AllowEmptySelection as true, null value will be allowed.
Thus, I would like to ask how to do the settings to achieve my requirement. Thanks.
