Passing data from one controller to another in asp.net mvc

Question

I am new to ASP.NET MVC. I have RestCallcontroller class. I want to pass data from Restcontroller to Home Controller. This is theRestController

public class RestCallController : Controller
{
    public  string loginJsonString;
    Result result = new Result();

    // GET: RestCall
    public async Task<ActionResult> RunAsync(string a, string b)
    {

        using (var handler = new HttpClientHandler { UseDefaultCredentials = true })
        using (var client = new HttpClient(handler))
        {

            var byteArray = Encoding.ASCII.GetBytes("username:password");
            client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", Convert.ToBase64String(byteArray));
            client.BaseAddress = new Uri("XXX");
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            HttpResponseMessage response = await client.GetAsync("XXX");

            if (response.IsSuccessStatusCode)
            {
                //Get the response
                 loginJsonString = await response.Content.ReadAsStringAsync();
                result.loginJsonStringop = loginJsonString;
                //Json deserialization
                VehicleResponse vehicleobj = JsonConvert.DeserializeObject<VehicleResponse>(loginJsonString);
                List<string> modelList = new List<string>();
                List<string> descriptionList = new List<string>();

                foreach (Vehicle veh in vehicleobj.Vehicles)
                {
                    var model = veh.Model;
                    var Description = veh.Description;
                    modelList.Add(model);
                    var modellist = modelList;
                    descriptionList.Add(Description);
                }
            }
        }
        return RedirectToAction("Index", "HomeController",new { resultop =result });
    }
}

Following is my HomeController.

public class HomeController : Controller
{
    string a;
    string b;

    // GET: Home
    public ActionResult Index(Result resultop)
    {
        RestCallController restcallController = new RestCallController();
        restcallController.RunAsync(a,b);
        resultop.loginJsonStringop = restcallController.loginJsonString;
        return View(resultop);
    }
}

This is my model class.

public class Result
    {
        public string loginJsonStringop { get; set; }
        public string modelop { get; set; }
        public string descriptionop { get; set; }
    }

I want to pass value of loginJsonString, modelList,descriptionList to index() method in Home Controller and view that in index view. If you have any suggestions please help me.

Answer 1

We have TempData in MVC to pass the data from one controller to another. you can even refer the Answer.

In your first controller you can do something.

TempData["jsonData"] = ANY_OBJECT;

And then in you home controller you can get it.

var object = TempData["jsonData"];

---

Update

---

Temp Data Limitation to keep in mind

but there is a catch.. temp data will be available only first call to controller. if you redirect to home pass after your rest controller you will be able to get temp data in home controller, but if you did some redirection and then you directed to home, and tried to get temp data it will not work. if you need that, and think creating proper model, and passing it to home controller is a good solution.

UPDATE you are trying to pass data using model then you can do something. --

public async Task<ActionResult> RunAsync(string a, string b)
{
  ...
  ...
  ...
  Result obj = new Result();
  obj.loginJsonStringop = "VALUE_OF_FIELD";
  ...
  ...
  ...
  return RedirectToActtion("Index", "HomeController",new { resultop =result });
}

and then you home controller must recieve this model in Index action.

public class HomeController : Controller
{       
    public ActionResult Index(Result resultop)
    {
        // do whatever you want to do with your "resultop" instance of type "Result"
        var value = resultop.loginJsonStringop;    // "VALUE_OF_FIELD"

        return View();
    }
}