Question

使用.net 4.6.1，我正在后端进行计算，以确定客户何时可以选择订单日期，具体取决于他们的每周发票日。计算和SelectedDate部分一样正常运行，但是，当SelectedDate恰好在以下月内时，默认情况下，我的日历不会自动前进以显示该月，它始终显示当前月而不管。我在做什么错了？

    protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
    {
        DayOfWeek invoiceDay = DayOfWeek.Wednesday;
        DateTime nextMonday = GetNextWeekday(DateTime.Today.AddDays(1), DayOfWeek.Monday, invoiceDay);

        if (e.Day.Date < nextMonday)
        {
            e.Day.IsSelectable = false;
            Calendar1.SelectedDate = nextMonday;
            Calendar1.VisibleDate = Calendar1.SelectedDate;
        }
    }

    public static DateTime GetNextWeekday(DateTime start, DayOfWeek day, DayOfWeek _invoiceDay)
    {
        int daysToAdd = ((int)day - (int)start.DayOfWeek + 7) % 7;

        if (_invoiceDay > DateTime.Now.DayOfWeek)
        {
            return start.AddDays(daysToAdd);
        }
        else
        {
            return start.AddDays(daysToAdd + 7);
        }
    }

Answer 1

我发现了我的问题。我只需要一个用于初始日历设置的单独方法，并在页面加载时调用它，而不是尝试从DayRender事件中调用所有方法。更新后的代码如下：

    private DayOfWeek logDay = DayOfWeek.Wednesday;
    private DateTime nextMonday;


    protected void Page_Load(object sender, EventArgs e)
    {
        CalendarSetup();
    }

    private void CalendarSetup ()
    {
        if (!IsPostBack)
        {
            logDay = DayOfWeek.Wednesday;
            nextMonday = GetNextWeekday(DateTime.Today.AddDays(1), DayOfWeek.Monday, logDay);
            Calendar1.SelectedDate = nextMonday;
            Calendar1.VisibleDate = Calendar1.SelectedDate;
        }
    }

    protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
    {
        if (e.Day.Date < nextMonday)
        {
            e.Day.IsSelectable = false;
        }
    }

    public static DateTime GetNextWeekday(DateTime start, DayOfWeek day, DayOfWeek _logDay)
    {
        int daysToAdd = ((int)day - (int)start.DayOfWeek + 7) % 7;

        if (_logDay > DateTime.Now.DayOfWeek)
        {
            return start.AddDays(daysToAdd);
        }
        else
        {
            return start.AddDays(daysToAdd + 7);
        }
    }

更改日历中的可见月份

1 个答案: