如何使用 MVC Contrib 将变量从一个控制器传递到另一个控制器？

Question

Jeremy Skinner 有一个关于从 MVC Contrib 导出电子表格的博客和视频。问题是他的视频或博客没有进行任何过滤。在与包含网格的页面关联的控制器中，我有过滤器，在与“导出到电子表格”关联的控制器中，我需要该过滤器而不需要重置。问题是，每次我单击“导出到”时，变量都会重置电子表格”链接。如何在不重置的情况下将该变量从一个控制器获取到另一个控制器？

这是 Jeremy 的链接，http://www.jeremyskinner.co.uk/2010/04/28 /mvccontrib-grid-presentation 谢谢！

Answer 1

我最终创建了一个像这样的会话变量：

1-通过编辑 web.config 来启用会话变量：

<configuration>
   <system.web>
      <sessionState cookieless="true" regenerateExpiredSessionId="true" />
   </system.web>
</configuration>

2- 在第一个控制器中创建会话状态

Session["FirstName"] = FirstNameTextBox.Text;

3- 在第二个控制器中使用会话状态

string firstName = (string)(Session["FirstName"]);

Answer 2

使用 TempData[""] 对象。

您的 ViewModel 应该类似于：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using MvcContrib.Pagination;
using MvcContrib.UI.Grid;
using System.Web.Mvc;

namespace MyMVCProject.ViewModels
{
    public class SubscriptionViewModel
    {
        public int SubscriptionID { get; set; }        
        public string SubNo { get; set; }               
    }
    public class SubscriptionListContainerViewModel
    {
        public IPagination<SubscriptionViewModel> SubscriptionPagedList { get; set; }
        public SubscriptionFilterViewModel Filters { get; set; }
        public GridSortOptions GridSortOptions { get; set; }
        public int? TotalCount { get; set; }
    }
    public class SubscriptionFilterViewModel
    {
        public int? CustomerID { get; set; }
        public int? PlanID { get; set; }        
    }
}

您的控制器操作：

    public ActionResult Index(SubscriptionListContainerViewModel model, GridSortOptions gridSortOptions, int? page)
            {
              SubscriptionFilterViewModel filter = new SubscriptionFilterViewModel();
                if (model.Filters != null)
                {
                    filter.CustomerID = model.Filters.CustomerID;
                    filter.PlanID = model.Filters.PlanID;
                }
              TempData["Filters"]=filter;
             //code for IPagination<SubscriptionViewModel> population.
            }

导出函数：

public void Export()
        {
          SubscriptionFilterViewModel filter = (SubscriptionFilterViewModel)TempData["Filters"];
          TempData["Filters"]=filter;
          //code for IPagination<SubscriptionViewModel> population and excel creation.
          //output the excel after creation

            Guid fileId = Guid.NewGuid();
            string strFileName = Convert.ToString(fileId) + ".xls";
            string strFilePathnName = HttpContext.Server.MapPath ("~/Content/Uploads/Excels/Export/") + strFileName;
            MemoryStream file = new MemoryStream();
            hssfworkbook.Write(file);
            System.IO.File.WriteAllBytes(strFilePathnName, file.GetBuffer());
            System.IO.FileInfo inf = new FileInfo(strFilePathnName);
            HttpContext.Response.AddHeader("Content-Disposition", "attachment; filename=Blogs" + inf.Extension);
            HttpContext.Response.ContentType = "application/ms-excel";
            HttpContext.Response.TransmitFile(HttpContext.Server.MapPath ("~/Content/Uploads/Excels/Export/" + strFileName));
        }

在“导出到 Excel”按钮单击中调用导出操作。