Winform程序中NumberUpdown控件作为年月选择框的代码增强

在NumberUpdown 的Valuechange事件中加入以下代码，自动处理12月加1，年度加1，01月减1，年份减1问题

            int currentMonth = (int)(nudFlowMonth1.Value) % 100;
            int currentYear = (int)(nudFlowMonth1.Value) / 100;
            if (currentMonth > 12)
            {
                currentMonth = 1;
                currentYear++;
                nudFlowMonth1.Value = currentYear * 100 + currentMonth;
            }
            if (currentMonth < 1)
            {
                currentMonth = 12;
                currentYear--;
                nudFlowMonth1.Value = currentYear * 100 + currentMonth;
            }