CODEWITHSUNDEEP
c#visual-studio-2015asp.net-corecustom-action-filter
nam
nam

Reputation: 23749

Using Using POST-REDIRECT-GET in ASP.NET MVC Core

In an ASP.NET MVC Core project how can I use an alternative of this custom action filter class. When I copy the following in my project's controller folder it does not recognize the following objects TempData[Key], ViewData because it's using System.Web.Mvc namespace that is not used in ASp.NET MVC Core. I want to implement POST-REDIRECT-GET in my ASP.NET MVC Core project as described here but the author, it seems, is not using MVC Core:

using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;
using Microsoft.AspNetCore.Mvc.ModelBinding;

namespace myASPCoreProject.Controllers
{

    public abstract class ModelStateTransfer : ActionFilterAttribute
    {
        protected static readonly string Key = typeof(ModelStateTransfer).FullName;
    }

    public class ExportModelStateAttribute : ModelStateTransfer
    {
        public override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            //Only export when ModelState is not valid
            if (!filterContext.ModelState.IsValid)
            {
                //Export if we are redirecting
                if ((filterContext.Result is RedirectResult) || (filterContext.Result is RedirectToRouteResult))
                {
                    filterContext.Controller.TempData[Key] = filterContext.ModelState;
                }
            }

            base.OnActionExecuted(filterContext);
        }
    }

    public class ImportModelStateAttribute : ModelStateTransfer
    {
        public override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            ModelStateDictionary modelState = filterContext.Controller.TempData[Key] as ModelStateDictionary;

            if (modelState != null)
            {
                //Only Import if we are viewing
                if (filterContext.Result is ViewResult)
                {
                    filterContext.Controller.ViewData.ModelState.Merge(modelState);
                }
                else
                {
                    //Otherwise remove it.
                    filterContext.Controller.TempData.Remove(Key);
                }
            }

            base.OnActionExecuted(filterContext);
        }
    }
}

Upvotes: 2

Views: 4847

Answers (1)

jecaestevez
jecaestevez

Reputation: 159

We can use Redirect To Action as you can read in the Microsoft's documentation RedirectToAction

Configure DI:

   public void ConfigureServices(IServiceCollection services)
{
    services.AddMvc();

    // Add the temp data provider
    services.AddSingleton<ITempDataProvider, CookieTempDataProvider>();
}


[HttpPost]
public IActionResult Edit(User user)
{
    _userRepository.Save(user);
    TempData["User"] = JsonConvert.SerializeObject(user);
    return RedirectToAction("Edit", new { id = user.Id });
}

other example

[HttpPost]
public IActionResult Edit(User user)
{

      _userRepository.Save(user);
      return RedirectToAction(nameof(UserController.Index), "User");
    }

Upvotes: 3

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