HttpContext is not available exception in web service

Question

1.00/5 (2 votes)

See more:

hello i have web service in my project.
i edit the "EnableSession=true" property ,
now i run a class in the webService and i wont in the class to use in "Context.Session"

so i send to the constructor the WebService refrence
now i try with this referense to use Context.Session
and i get :
NULL REFERENCE exception
"Object reference not set to an instance of an object."

please helpppp !!

Posted 22-Oct-14 11:46am

Member 10631195

Add a Solution

Comments

Sergey Alexandrovich Kryukov 22-Oct-14 17:56pm

Not enough information. This problem is usually easily spotted by the debugger.
—SA

Member 10631195 22-Oct-14 17:59pm

i can use in the webservice in the "Context.Session" but whare i crete a new class
and i wont in the class to add value in "Context.Session" i get exception

Sergey Alexandrovich Kryukov 22-Oct-14 18:04pm

Debugger...

Member 10631195 22-Oct-14 18:04pm

[WebMethod(EnableSession=true)]
public string xy(string value)
{
///here i can get sessions values ==>Context.Session["myVal"];
class MyClass=new MyClass(this);
//in myClass i tray to put value at the "Context.Session"
}

Sergey Alexandrovich Kryukov 22-Oct-14 18:05pm

And..?
—SA

Member 10631195 22-Oct-14 18:24pm

and i try in the webService referense to get Context.Session["myVal"];
i get null Reference exception

Sergey Alexandrovich Kryukov 22-Oct-14 18:58pm

Look, let's stop it. Do I have to pull information from you line by line? Please, calm down, find out what information would comprehensively describe your problem (or at least almost) and post it — never in comments, but using "Improve question". Use the debugger...
—SA

jkirkerx 23-Oct-14 18:18pm

Did you actually make a context?
Dim m_context as httpcontext = httpcontext.current
Does the session actually exist?
m_context.session("yourValue")

Member 10631195 24-Oct-14 10:48am

the session is exist i checked some values and it is working good
The question is if i create a class in the webservice and i wont the chang values in the class how i do it?
i tray to send "webService" OBJECT referece to class cunstructor and i steel get a NULL Exception

jkirkerx 24-Oct-14 12:26pm

I use web services all the time, in conjuction with jquery ajax calls, and use the session variable all the time. I even make calls from the web service to a class, and check against session vars and it works fine.

You would have to post an example of your web service and call to a class for us to see what is happening.

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)