Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

session variable / datetime

Posted on 2011-03-09
2
Medium Priority
?
363 Views
Last Modified: 2012-08-13
c sharp  .net

have a couple of Session Variables:

protected void Session_Start(object sender, EventArgs e)
{
    Session.Add("serverTimeAdjustment", 6);
    Session.Add("todaysDateTimeServerAdjusted", DateTime.Now.AddHours(Session["serverTimeAdjustment"]));
}

When I want to retieve this variable elsewhere in the web app, I use the following:

DateTime reportingDateTime = (DateTime)Session["todaysDateTimeServerAdjusted"];

Compiling is fine - but the debugger is then complaining when running ... and the following error on the above line:

'Object reference not set to an instance of an object.'
0
Comment
Question by:amillyard
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 52

Accepted Solution

by:
Carl Tawn earned 2000 total points
ID: 35082168
That would suggest that you are trying to read the session value at some point before it has been set. You should do a sanity check before trying to access it:
if (Session["todaysDateTimeServerAdjusted"] != null)
{
      DateTime reportingDateTime = (DateTime)Session["todaysDateTimeServerAdjusted"];
}
else
{
     // some sort of default
}

Open in new window

0
 

Author Closing Comment

by:amillyard
ID: 35082472
carl_tawn: spot on ... scripting was not initialising as early as hoped !  thanks :-)
0

Featured Post

[Webinar] Lessons on Recovering from Petya

Skyport is working hard to help customers recover from recent attacks, like the Petya worm. This work has brought to light some important lessons. New malware attacks like this can take down your entire environment. Learn from others mistakes on how to prevent Petya like worms.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A quick way to get a menu to work on our website, is using the Menu control and assign it to a web.sitemap using SiteMapDataSource. Example of web.sitemap file: (CODE) Sample code to add to the page menu: (CODE) Running the application, we wi…
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
Visualize your data even better in Access queries. Given a date and a value, this lesson shows how to compare that value with the previous value, calculate the difference, and display a circle if the value is the same, an up triangle if it increased…
Please read the paragraph below before following the instructions in the video — there are important caveats in the paragraph that I did not mention in the video. If your PaperPort 12 or PaperPort 14 is failing to start, or crashing, or hanging, …

636 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question