How to use and store data in session variable in controller event

Asked Mar 26 '19 at 05:19

Active Mar 26 '19 at 05:41

Viewed 47 times

public void MqttMsgPublishReceived(object sender, MqttMsgPublishEventArgs e)
{
    string ReceivedMessage = System.Text.ASCIIEncoding.ASCII.GetString(e.Message);

    if (ReceivedMessage.Contains("M2MType IO"))
    {
        Session["msg"] = ReceivedMessage;  // not storing data
    }
}

The line

Session["msg"] = ReceivedMessage;

is not storing data into msg

I don't know why this happening. Please tell me how to use a session variable in the event function.

edited Mar 26 '19 at 05:41

marc_s

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asked Mar 26 '19 at 05:19

Ramu Vishwakarma

Is debugger goes inside `if` ? – er-sho Mar 26 '19 at 05:37
yes, but not in Session["msg"] = ReceivedMessage; – Ramu Vishwakarma Mar 26 '19 at 05:38
how do you inspect that session does not stored data? and how you use it? – er-sho Mar 26 '19 at 05:46
How do you know it is not storing? – Chetan Mar 26 '19 at 05:47
actually, it is giving an error like -- Object reference not set to an instance of an object error – Ramu Vishwakarma Mar 26 '19 at 05:56
@RamuVishwakarma, on which line? – er-sho Mar 26 '19 at 05:59
Regarding the error message, it's clearly a `NullReferenceException` (NRE) - please see [this post](https://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it?rq=1) to find out and fix the problem. – Tetsuya Yamamoto Mar 26 '19 at 06:04
@er-sho, Session["msg"] = ReceivedMessage; on this line – Ramu Vishwakarma Mar 26 '19 at 06:07
Actually, I have used a session variable to store and retrieve the value in the normal function there it is working. but in an event function, as I have given in the problem is not working. – Ramu Vishwakarma Mar 26 '19 at 06:14
1

could you please check the namespace for `Session` ? Is it comes from `HttpContext` or from any other ? – er-sho Mar 26 '19 at 06:32
do you have init session in global.asax? protected void Session_Start(Object sender, EventArgs e) { } – Janmejay Kumar Mar 26 '19 at 07:04

How to use and store data in session variable in controller event

0 Answers0