ASP CORE 动态更新 viewbag 日期标头

Question

你好，我是asp核心的新手，任务是制作日记应用程序。单击上周按钮时，我遇到更改表格日期标题的问题。按下按钮时，它应显示上周和下周的日期。如果这是一个非常愚蠢的问题，或者我完全做错了，请提前道歉。它适用于在页面加载时获取当前周日期，但无法让它在周之间闪烁。

如果还需要更多信息，请告诉我..谢谢:)

index.cshtml
<input type="submit" method="index" value="Previous Week" class="btn btn-light" onclick="location.href = '@Url.Action("Index", "Appointment",new {mon = ViewBag.monday, tues = ViewBag.tuesday, wed = ViewBag.wednesday, thurs = ViewBag.Thursday, fri = ViewBag.friday, sat = ViewBag.saturday,sun = ViewBag.sunday})'"/>
<td width="87" align="center" <font color="#0000A0" size="1">Monday <br /> @ViewBag.monday </font></td>
<td width="87" align="center" <font color="#0000A0" size="1">Tuesday<br>@ViewBag.tuesday</font></td>

AppointmentController
[HttpGet]
public IActionResult Index()
{
ViewBag.monday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Monday).ToString("dd-MM-yyyy");
ViewBag.tuesday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Tuesday).ToString("dd-MM-yyyy");
ViewBag.wednesday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Wednesday).ToString("dd-MM-yyyy");
ViewBag.thursday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Thursday).ToString("dd-MM-yyyy");
ViewBag.friday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Friday).ToString("dd-MM-yyyy");
ViewBag.saturday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Saturday).ToString("dd-MM-yyyy");
ViewBag.sunday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Sunday + 7).ToString("dd-MM-yyyy");
return View();
}
[HttpPost]
public IActionResult Index(DateTime mon, DateTime tues, DateTime wed, DateTime thurs, DateTime fri, DateTime Sat, DateTime sun)
{
//previous week
ViewBag.Monday = mon.AddDays(-7);
ViewBag.tuesday = tues.AddDays(-7);
ViewBag.wednesday = wed.AddDays(-7);
ViewBag.thursday = thurs.AddDays(-7);
ViewBag.friday = fri.AddDays(-7);
ViewBag.saturday = Sat.AddDays(-7);
ViewBag.sunday = sun.AddDays(-7);
return View();
}

Answer 1

设法在一次操作中解决了这个问题，但我认为像约翰所说的那样将其分开。在下面发布我当前的解决方案，以防将来对任何人有所帮助！

<input type="submit" method="index" value="Previous Week" class="btn btn-light" onclick="location.href = '@Url.Action("Index", "Appointment",new {state = 1,mon = ViewBag.monday, tues = ViewBag.tuesday,
                                    wed = ViewBag.wednesday, thurs = ViewBag.Thursday, fri = ViewBag.friday, sat = ViewBag.saturday,
                                    sun = ViewBag.sunday})'"/>
<input type="submit" value="Current Week" class="btn btn-light" onclick="location.href = '@Url.Action("Index", "Appointment",new {state = 0,mon = ViewBag.monday, tues = ViewBag.tuesday,
                                    wed = ViewBag.wednesday, thurs = ViewBag.Thursday, fri = ViewBag.friday, sat = ViewBag.saturday,
                                    sun = ViewBag.sunday})'"/>
<input type="submit" value="Next Week" class="btn btn-light" onclick="location.href = '@Url.Action("Index", "Appointment",new {state = 2,mon = ViewBag.monday, tues = ViewBag.tuesday,
                                    wed = ViewBag.wednesday, thurs = ViewBag.Thursday, fri = ViewBag.friday, sat = ViewBag.saturday,
                                    sun = ViewBag.sunday})'"/>

public IActionResult Index(int state, string mon, string tues, string wed, string thurs, string fri, string Sat, string sun)
{
//var mon
if (state <= 0)
{
ViewBag.monday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Monday).ToString("dd-MM-yyyy");
ViewBag.tuesday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Tuesday).ToString("dd-MM-yyyy");
ViewBag.wednesday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Wednesday).ToString("dd-MM-yyyy");
ViewBag.thursday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Thursday).ToString("dd-MM-yyyy");
ViewBag.friday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Friday).ToString("dd-MM-yyyy");
ViewBag.saturday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Saturday).ToString("dd-MM-yyyy");
ViewBag.sunday = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek + (int)DayOfWeek.Sunday + 7).ToString("dd-MM-yyyy");
return View();
}
else if(state == 1){
var pmon = Convert.ToDateTime(mon).AddDays(-7);
var ptues = Convert.ToDateTime(tues).AddDays(-7);
var pwed = Convert.ToDateTime(wed).AddDays(-7);
var pthur = Convert.ToDateTime(thurs).AddDays(-7);
var pfri = Convert.ToDateTime(fri).AddDays(-7);
var psat = Convert.ToDateTime(Sat).AddDays(-7);
var psun = Convert.ToDateTime(sun).AddDays(-7);
ViewBag.Monday = pmon.ToString("dd-MM-yyyy"); 
ViewBag.tuesday = ptues.ToString("dd-MM-yyyy");
ViewBag.wednesday = pwed.ToString("dd-MM-yyyy");
ViewBag.thursday = pthur.ToString("dd-MM-yyyy");
ViewBag.friday = pfri.ToString("dd-MM-yyyy");
ViewBag.saturday = psat.ToString("dd-MM-yyyy");
ViewBag.sunday = psun.ToString("dd-MM-yyyy");
return View();
}
else if (state == 2)
{
var pmon = Convert.ToDateTime(mon).AddDays(7);
var ptues = Convert.ToDateTime(tues).AddDays(7);
var pwed = Convert.ToDateTime(wed).AddDays(7);
var pthur = Convert.ToDateTime(thurs).AddDays(7);
var pfri = Convert.ToDateTime(fri).AddDays(7);
var psat = Convert.ToDateTime(Sat).AddDays(7);
var psun = Convert.ToDateTime(sun).AddDays(7);
ViewBag.Monday = pmon.ToString("dd-MM-yyyy");
ViewBag.tuesday = ptues.ToString("dd-MM-yyyy");
ViewBag.wednesday = pwed.ToString("dd-MM-yyyy");
ViewBag.thursday = pthur.ToString("dd-MM-yyyy");
ViewBag.friday = pfri.ToString("dd-MM-yyyy");
ViewBag.saturday = psat.ToString("dd-MM-yyyy");
ViewBag.sunday = psun.ToString("dd-MM-yyyy");
return View();
}
else
{
return View("NotFound");
}