internal void Validate()
{
var format = TextBoxValidationExtensions.GetFormat(_textBox);
var expectNonEmpty = (format & ValidTextBoxFormats.NonEmpty) != 0;
var isEmpty = string.IsNullOrWhiteSpace(_textBox.Text);
if (expectNonEmpty && isEmpty)
{
MarkInvalid();
return;
}
var expectNumber = (format & ValidTextBoxFormats.Numeric) != 0;
if (expectNumber &&
!isEmpty &&
!IsNumeric())
{
MarkInvalid();
return;
}
MarkValid();
}
protected virtual void MarkInvalid()
{
var brush = TextBoxValidationExtensions.GetInvalidBrush(_textBox);
_textBox.Background = brush;
}