private member in controller returns null after being set in action result

Question

I have a controller in ASP.NET MVC application.

private GipDbContext db = new GipDbContext();
private Employee employeeObj;

public ActionResult Edit(int? id)
          


        

Answer 1

Controllers are instantiated for each request. Once you request TimeSeriesData, the controller that was created for the request to Edit has already been disposed. If you need to hold on to a piece of data between requests, you must either put it in Session or TempData (both of which use sessions).