如何在datetimepicker控件中限制用戶僅選擇當前月份日期？

Question

我希望用戶僅選擇當前月份的日期，但我不知道應該在min和max date屬性中添加什么。

是否有“當前月份”之類的屬性？

Answer 1

由於MinDate和MaxDate屬性都采用DateTime ，因此可以將它們設置為；

DateTimePicker1.MinDate = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);

DateTimePicker1.MaxDate = (new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1))
                          .AddMonths(1).AddDays(-1);

Answer 2

是的，您可以使用屬性MinDate和MaxDate並設置可以在控件中選擇的最小和最大日期。

var currentYear = DateTime.Now.Year;
var currentMonth = DateTime.Now.Month;
int firstDayInCurrentMonth = 1;
int lastDayInCurrentMonth = DateTime.DaysInMonth(currentYear, currentMonth);

dateTimePicker.MinDate = new DateTime(currentYear, currentMonth, firstDayInCurrentMonth);
dateTimePicker.MaxDate = new DateTime(currentYear, currentMonth, lastDayInCurrentMonth);