How to use Session in InitialiationModule

Tan Linh

Vote:

Hi everyone,

I'm having an issue, that is use HttpContext.Current.Session. I want check existence of a session variable, but if it doesn't exist, my project will display "Object reference not set to an instance of an object."

This is my code.

        private void SaveProperties(object senders, ContentEventArgs e)
        {
            var propertyPageLocator = PropertyPageLocator.GetInstance();
            var contentRepository = ServiceLocator.Current.GetInstance();

            if (e.Content is PropertyPage)
            {
                var currentPage = e.Content as PropertyPage;
                PropertyPage cloneCurrentPage = currentPage.CreateWritableClone() as PropertyPage;

                if (HttpContext.Current.Session["RunPluginAdmin"] == null)
                {
                    propertyPageLocator.UpdateMinMaxAcres(ref cloneCurrentPage);
                    propertyPageLocator.UpdateMinMaxAvailableSqFt(ref cloneCurrentPage);
                    contentRepository.Save(cloneCurrentPage, SaveAction.ForceCurrentVersion);
                }
            }
        }

Anyone can resolve this? Thank you :)

#185701

Edited, Nov 30, 2017 8:40

Henrik Fransas

Vote:

A InitialiationModule run during startup of the site so you will propably not have any current session at that stage. You need to same/get that property from something else.

What do it do and when do you set the value in the session

#185715

Nov 30, 2017 10:26

Tan Linh

Vote:

Hi @Henrik Fransas,

Thanks for your answer. Let me describe the way i do that.

I created an InitializationModule to generate properties for page, the page type has some properties [Editable(false)] and only generate when created page.

And I also need create an admin plugin to generate property for all of pages in my system because before that, their properties haven't initialized yet. But when i run the plugin, it has a problem about saving page (conflict with InitializationModule). So i tried use Session to check the page is edited by plugin or user, and i get this issue.

Do you have any idea for my isse?

Thank you very much.

#185717

Edited, Nov 30, 2017 10:45

Henrik Fransas

Vote:

Why do you not just use SetDefaultValue?

What is PropertyPageLocator?

#185720

Nov 30, 2017 11:09

Tan Linh

Vote:

Ah because those properties dependent value user input.

PropertyPageLocator is just a module to update properties for page. You don't need to pay attention to it.

#185721

Nov 30, 2017 11:15

Tan Linh

Vote:

Oh i detected when i run plugin, session != null and when i edit page, session == null in InitializationModule :D.

Thank you beacause of your suggestion.

#185728

Nov 30, 2017 12:02

Henrik Fransas

Vote:

So you solved it, great! :-)

#185730

Nov 30, 2017 12:16

Tan Linh

Vote:

Thank you :-)

#185756

Dec 01, 2017 3:27

Try our conversational search powered by Generative AI!

How to use Session in InitialiationModule