c#中numericUpDown把值删除后的处理

//删除后把值改为0,把0当成空值

private void edtYF3_Validated(object sender, EventArgs e)        {            UpDownBase up = (UpDownBase)edtYF3;            if (string.IsNullOrEmpty(up.Text))            {                edtYF3.Value = 0;                up.Text = "0";            }

        }