How to create session in MVC

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not able to create session and retrieve values from session

What I have tried:

Session["USERID"] = "manish";

showing error: "

Object reference not set to an instance of an object.

" is

same error is also coming while creating cookie also

Posted 22-Jan-19 5:24am

manish-gusain8909

Updated 22-Jan-19 6:19am

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F-ES Sitecore · Answer 1 · 2019-01-22T05:34:00

You haven't said where you are writing this code. Using Session on its own tends to only work in a controller. Elsewhere you might need to use

System.Web.HttpContext.Current.Session["USERID"] = "xyz";

Note that it is designed that way for a reason, if that is the issue then you might be trying to access the Session somewhere you shouldn't.

MadMyche · Answer 2 · 2019-01-22T06:19:00

If your project is running on ASP.NET Core, you will need to add in a few items to the ConfigureServices portion of your Startup.cs file

C#

public void ConfigureServices(IServiceCollection services) {
  // ...  your other items 
  services.AddDistributedMemoryCache();
  services.AddSession();
}

More Info: Session and app state in ASP.NET Core | Microsoft Docs[^]

How to create session in MVC

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