.net 根据html的input type=“week“控件的值获取星期一和星期日的日期

初始化 "week" 控件值：

//MVC部分
public ActionResult WeeklyList()
{
    int weekNo = new GregorianCalendar().GetWeekOfYear(System.DateTime.Now, System.Globalization.CalendarWeekRule.FirstDay, DayOfWeek.Sunday);
    string DefaultWeek = DateTime.Now.Year + "-W" + weekNo;//2024-W42
    ViewBag.DefaultWeek = DefaultWeek;//传值到html

    return View();
}

//html部分
<input type="week" id="txt_week" class="my-css" value="@ViewBag.DefaultWeek" />

获取 "week" 控件所选中的星期一和星期日的值

        $(function () {
            $("#btnSearch").click(function () {
                var weekPicker = document.getElementById('txt_week');//type=week控件对象
                var dateString = weekPicker.value;//控件值格式为： 'YYYY-WW'，如：2024-W42
                var year = parseInt(dateString.substr(0, 4), 10);//截取字符串“年”的部分:2024
                var week = parseInt(dateString.substr(6, 2), 10);//截取字符串“第几周”的部分:42

                //计算日期
                var jsDate = new Date(year, 0, (week - 1) * 7);//生成日期
                var dayOfWeek = jsDate.getDay();
                var dayOffset = dayOfWeek === 1 ? 0 : 1 - dayOfWeek;
                
                var monday = new Date(jsDate.setDate(jsDate.getDate() + dayOffset + 1));//星期一日期
                var sunday = new Date(jsDate.setDate(monday.getDate() + 6));//星期日日期(星期一+6天)

                console.log('星期一: ' + monday.toISOString().substr(0, 10));
                console.log('星期日: ' + sunday.toISOString().substr(0, 10));

            });
        });