c# - 使用 session 变量在一个页面上选择一个日期，并在 C# 中离开该页面后使其保持相同的日期

Question

我有一个允许用户选择开始日期的页面。当他们选择该特定日期时，我希望他们能够导航到不同的页面，然后返回到该页面，开始日期保持不变。有谁知道如何使用 MVC4 中的 session 变量来做到这一点？

  m.StartDate = DateTime.Today.AddDays(-1);
  m.EndDate = DateTime.Today.AddDays(-1);

  m.StartDate = new DateTime(2018, 10, 18);
  m.EndDate = new DateTime(2018, 10, 18);

  Session["StartDate"] = m.StartDate; 

  if(Session["StartDate"] !=null)
  {
       //show the date selected by the user
  } 
  else {
  m.StartDate = new DateTime(2018, 10, 18);
  m.EndDate = new DateTime(2018, 10, 18);
  }

  parameters.StartDate = m.StartDate;
  parameters.EndDate = m.EndDate;

查看模型:

    public List<rptStoreTransferLog> lstFilteredrptStoreTransferLog = new List<rptStoreTransferLog>();
    public List<rptStoreTransferLog> rptStoreTransferLog = new List<rptStoreTransferLog>();
    public List<StoreDefinition> lstStoreDefinition = new List<StoreDefinition>();
    public SelectionFilter SelectionFilter;
    public DateTime StartDate;
    public DateTime EndDate;
    public bool SingleDateSelect;
    public string SearchText = "";
    public string SearchPlaceholderText = "";
    public string PreviousColumnSearch = "StoreName";
    public string strSingleDateSelect = " Single Date Select";
    public int PreviousSelectedDivisionID;
    public int PreviousSelectedProfitCentreID;
    public int PreviousSelectedJobID;
    public int PreviousSelectedStatusID;
    public SelectReportSelections SelectReportSelections = new SelectReportSelections();


View: 

@helper GetSingleDateSelect()
{
  if (Model.SingleDateSelect == true)
  {
    @Html.CheckBoxFor(m => m.SingleDateSelect, new { @checked = "checked" });
    @Html.DisplayTextFor(m => m.strSingleDateSelect)
  }
  else
  {
    @Html.CheckBoxFor(m => m.SingleDateSelect);
    @Html.DisplayTextFor(m => m.strSingleDateSelect)
  }
}

Answer 1

只有当他们将值提交给您的 Controller 操作时，您才能这样做。

从你的问题中不清楚你是如何连接它的，但你需要日期作为模型属性的输入，然后如果你愿意，你可以将它存储在 session 中。但是，通常您只需将它发送回第二页的模型中，并将其作为隐藏值保留在那里。这样您的应用程序就会保持良好的无状态状态，您不必担心 session 变量。