NumberEdit.IsNull Event

When the Format property specifies a format ( N ) that does not display empty data and the Value property is 0 , it is used to determine whether it is 0 entered or cleared with the Delete key.

When you refer to the property, the value is as follows.

Value	Description
$TRUE	It is in a cleared state by the Delete key
$FALSE	0 is entered

When a value is set in the property, the behavior is as follows.

Value	Description
$TRUE	Hide 0 and leave it blank
$FALSE	Display 0

Example

NumberEdit num1 {
    Format = "990N";
    Function OnTouch(e) {
        if (Value == 0 && IsNull == $TRUE) {
            MessageBox("何か入力してください");
        }
    }
}
Button btn {
    Title="クリア";
    Function OnTouch(e) {
        ^.num1.IsNull = $TRUE;
    }
}

If the Format property does not specify a format (N) that does not display empty data, setting $ TRUE for this property will not result in blanks. Also, when there is a screen operation, it will be $ FALSE.

Added since Ver.4.0.3, Mobile Ver.2.0.0