>Hello. I have an application where the users can input a $0.00 value. I've tried Numeric(10,2) and Money as the data types, but it still says it cannot save the dataset becuase Cost is required. $0.00 is a valid input value.
>
>Thanks.

Per Kevin's instructions you can just change your existing rule.

Rule where field is required but Empty Value was not checked
/// <summary>
/// Validates the Beginning Balance
/// </summary>
public string ValidateBeginningBalance(decimal? beginningBalance)
{
	string Msg = null;
	if (mmType.IsEmpty(beginningBalance))
	{
		this.EntityPropertyDisplayName = "Beginning Balance";

		Msg = this.RequiredFieldMessagePrefix + 
			this.EntityPropertyDisplayName + 
			this.RequiredFieldMessageSuffix;

		AddErrorProviderBrokenRule("BeginningBalance",  Msg);
	}
	return Msg;
}

Rule where required but Allow Empty Value was checked
/// <summary>
/// Validates the Ending Balance
/// </summary>
public string ValidateEndingBalance(decimal endingBalance)
{
	string Msg = null;
	if (mmType.IsEmpty(endingBalance, true))
	{
		this.EntityPropertyDisplayName = "Ending Balance";

		Msg = this.RequiredFieldMessagePrefix + 
			this.EntityPropertyDisplayName + 
			this.RequiredFieldMessageSuffix;

		AddErrorProviderBrokenRule("EndingBalance",  Msg);
	}
	return Msg;
}

Bottom line is when checking mmType.IsEmtpty you need to pass in the additional parameter of "true"
Timothy