Skip to main content

SESSION TIMEOUT

As we knew that its a very big problem specially when developers provide a very large entry page to users. It will be Irritating for users after entering all data & then session timeout occur. To prevent or avoid session timeout problem, there is no fixed or specific or direct way to handle. But one can handle this problem using javascript asynchronous call. But one thing keep in mind that time to execute the javacript method must be less than your session timeout time. Otherwise the method will not work. So, carefully set the time aganist IIS or web.config file session time. The cross-browser javascript method is given below:

01 <script language="javascript" type="text/javascript"
02 function Prevent_Session_Timeout() 
03
04 var callerurl = "Prevent_Session.aspx"; 
05   
06 if (window.XMLHttpRequest) 
07
08 xhttp = new XMLHttpRequest() 
09
10 else 
11
12 xhttp = new ActiveXObject("Microsoft.XMLHTTP") 
13
14 xhttp.open("POST", callerurl, true); 
15 xhttp.send(""); 
16   
17 window.setTimeout("Prevent_Session_Timeout();", 60000); 
18
19   
20 //Initial calling
21 Prevent_Session_Timeout(); 
22 </script>

Important Notes:
1. Just create an aspx page named Prevent_Session.aspx. Because this page will be internally called by the above javascript method without any reflection to user.
2. You must set the window.setTimeout time parameter which never exceed the session timeout time of your project.
3. Paste the code in your main master page so that you need not write the code for each aspx page.

Script Tested for the following browsers:
1. Internet Explorer (IE)
2. Mozilla Firefox
3. Opera
4. Google Chrome

Comments

Popular posts from this blog

GRIDVIEW GROUPING

When displaying data, we sometimes would like to group data for better user experience or when displaying long list of hierarchal data, we would want to display them in a tree view kind of structure. There is more than way of doing this, but I am going to explain achieving this functionality using  AJAX Collapsible Panel Extender Control . Overview: I am going to use  Adventure Works  as datasource. Every product in  Production.Product  table belongs to a product sub category. We fetch handful of products and the sub categories they belong to from the database. Our objective is to list all the available sub categories and allow user to  expand/collapse  to look/hide the list of products belonging to each subcategory. Database Connection Added following entry under  connectionStrings  element in  web.config . < add   name = "Sql"   connectionString="Data Source=(local); Initial  Catalog = AdventureWorks ...

GRIDVIEW ZOOM IMAGE

When you have images in your  GridView , you would most likely show them as thumbnails so as to not distort the whole layout. However user would want to look at the full image by clicking on the image or just hovering his mouse over it. In today’s applications, this is a basic requirement and there are just so many third party controls or plugins which would support this functionality. I am going do this conventional way using  javascript  way in this article.  On top of it, I am also going to explain how to get images from database using  HttpHandlers . Example: I am using  Adventure Works  as datasource. We fetch handful of products and bind them to the grid. When page is initially loaded, we retrieve products from Production . Product  table and bind them to the grid. We display some product attributes such as Product ID, Product Number, Product Name, List Price and product’s thumbnail. When user hover his mouse on the page, we fetch the f...

Editing Child GridView in Nested GridView

Editing Child GridView in Nested GridView In this article we will explore how to edit child gridview in the nested gridview.   Let''s write some code. Step 1:  Add scriptmanager in the aspx page. < asp : ScriptManager   ID ="ScriptManager1"   runat ="server"   EnablePageMethods ="true"> </ asp : ScriptManager > Step 2:  Add below stylesheet for modal popup. < style   type ="text/css">        .modalBackground        {              background-color : Gray;              filter : alpha(opacity=80);              opacity : 0.5;       }        .ModalWindow        {     ...