How do I Pass a Variable from one Controller to another using MVC Contrib?
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18-04-2021 - |
質問
Jeremy Skinner has a blog and a video about exporting a spreadsheet from MVC Contrib. The problem is there is no filtering done in his video or blog. In the controller associated with page containing the grid, I have the filters and in the controller associated with the "Export to Spreadsheet, I need that filter without being reset. The problem is, the variable gets reset everytime I click on the "Export to Spreadsheet" link. How do I get that variable from one controller to another without resetting?
Here is Jeremy's link, http://www.jeremyskinner.co.uk/2010/04/28/mvccontrib-grid-presentation. Thank you!!
解決
I ended up creating a Session variable like this:
1- Enable the session variable by editing the web.config with this:.
<configuration>
<system.web>
<sessionState cookieless="true" regenerateExpiredSessionId="true" />
</system.web>
</configuration>
2- Create Session State in first controller
Session["FirstName"] = FirstNameTextBox.Text;
3- Use Session State in second contoller
string firstName = (string)(Session["FirstName"]);
他のヒント
Use TempData[""] object.
Your ViewModel should look somewhat like:
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; }
}
}
Your Controller Action:
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.
}
Export Function:
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));
}
Call the export action in your "Export to Excel" button click.