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Programming Practice for Server Side State Maintenance Variable

, 11 Jan 2011
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Programming practice for server side state maintenance variable

Introduction

Http protocol is stateless, so we need to maintain state on Client side or Server side. For this time, I am going to discuss about the maintaining state on Server Side with one programming practice.

Problem

To maintain state on Server side, most of the developers use Session, Caching, Application variables. But most of the beginner developers make one mistake, which is:

session["myData"] = data;

Code pushes data in session variable(s).

Data = (Conversion_To_Data_Type_Of_Data) session["mydata"];

Code gets data back from session variable.So most of the developers follow the above procedure to push and get data from server side variable.

Disadvantages

  1. Developer requires remembering name of string value, i.e., name of the variable. If you refer to the above code, it's mydata.
  2. If there are a number of developers working on a project, it’s hard to maintain server side variable if we follow the above procedure, i.e., your maintenance increases.
  3. If there are large number of developers working in your project, you require to inform each and every one about the variable you are declaring.

Solution

The easiest solution that I found after doing so much programming is as follows:

Step 1

Create one static class:

public class SessionPropeties
{
 // code
}

Step 2

Create property for each session variable of your application as shown below:

public int UserId
{
        get
        {
           if(HttpContext.Current.Session["UserID"]!=null)
            return Convert.ToInt32(HttpContext.Current.Session["UserID"].ToString());
           else
          return 0;
        }
        set
        {
            HttpContext.Current.Session["UserID"] = value;
        }
}

After following the above steps, the class will be like below:

public class SessionPropeties
{
 public DataType prop1
 {
        get
        {
           if(HttpContext.Current.Session["prop1"]!=null)
            return Convert.ToDataType (HttpContext.Current.Session["prop1"].ToString());
           else
            return defaultvalue;
        }
        set
        {
            HttpContext.Current.Session["prop1"] = value;
        }
      
 }
 public DataType prop2
 {
        get
        {
           if(HttpContext.Current.Session["prop2"]!=null)
            return Convert.ToDataType (HttpContext.Current.Session["prop2"].ToString());
           else
            return defaultvalue;
        }
        set
        {
            HttpContext.Current.Session["prop2"] = value;
        }
      
 }
 
 ...........
 
}

Step 3

In coding to get and set data, you just require to call these properties.

To set data
SessionProperties.UserId = 1;
To get data
int userid = SessionProperties.UserId;

Advantages

  1. Once you declare your properties, you do not need to remember it. You just need to call your Session property class.
  2. Maintenance becomes easy when project size is large or there are a number of developers working in a team, because you just need to refer to the Sessionproperties class having all severside properties. And you can also add property you need and you don’t require to inform all the people working in your team.

Summary

You can maintain your Cache and Application server side variable in a similar way. So it's better you encapsulate your server side variable in one class which makes your task easy when you do code in web application.

License

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

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About the Author

Pranay Rana
Software Developer (Senior) GMind Solusion
India India

Microsoft C# MVP (12-13)

 
Hey, I am Pranay Rana, working as a ITA in MNC. Web development in Asp.Net with C# and MS sql server are the experience tools that I have had for the past 5.5 years now.
 
For me def. of programming is : Programming is something that you do once and that get used by multiple for many years
 

You can visit my blog

StackOverFlow - http://stackoverflow.com/users/314488/pranay
My CV :- http://careers.stackoverflow.com/pranayamr
 
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Comments and Discussions

 
GeneralAll objects into a single Class PinmemberYves17-Jan-11 14:59 
What just a simple Class with all the session members that we would need.
public class SessionPropeties
{
#region Public Data Member(s)
 
public int iUserID;
public string strLang;
public string strUserName;
 
//etc..etc
#endregion
 
#region Constructor
 
public SessionPropeties()
{
iUserID =-1;
strLang = "EN";
strUserName = "";
}
 
#endregion
 
#region Public Method(s)
 
static SessionPropeties GetSession()
{
SessionPropeties mySession = null;
try
{
mySession = (SessionPropeties)HttpContext.Current.Session["MySessionProperties"];
}
catch { }
return mySession;
}
 
static void SaveSession(SessionPropeties _mySession)
{
HttpContext.Current.Session["MySessionProperties"] = _mySession;
}
 
#endregion
}
 

You Build the object in Global.Asax
 
Sub Session_Start(ByVal Sender As Object, ByVal E As EventArgs)
Dim sessionInfo As New SessionPropeties()
'Do this only once
SessionPropeties.SaveSession(sessionInfo)
End Sub
 
You can access at all members like this ... StrongType properties
Dim sessionInfo As SessionPropeties= SessionPropeties.GetSession()
GeneralMy vote of 1 Pinmemberaprishchepov13-Jan-11 10:33 
GeneralRe: My vote of 1 PinmemberPranay Rana14-Jan-11 7:22 
GeneralMy vote of 4 PinmemberPravin Patil, Mumbai12-Jan-11 3:15 
GeneralRe: My vote of 4 PinmemberPranay Rana12-Jan-11 5:58 
GeneralMy vote of 4 PinmemberRuchit S.11-Jan-11 20:12 
GeneralRe: My vote of 4 PinmemberPranay Rana11-Jan-11 20:14 
GeneralGood job! PinmemberVenkatesh Mookkan11-Jan-11 19:52 
GeneralRe: Good job! PinmemberPranay Rana11-Jan-11 19:58 
GeneralMy vote of 4 PinmemberKrunal Mevada11-Jan-11 18:48 
GeneralRe: My vote of 4 PinmemberPranay Rana11-Jan-11 20:06 
GeneralBetter design.. PinmemberRuchit S.11-Jan-11 18:43 
GeneralRe: Better design.. PinmemberVenkatesh Mookkan11-Jan-11 19:57 
GeneralRe: Better design.. PinmemberRuchit S.11-Jan-11 20:11 
GeneralThoughts PinmemberPIEBALDconsult11-Jan-11 18:13 
GeneralRe: Thoughts PinmemberPranay Rana11-Jan-11 18:33 
GeneralRe: Thoughts PinmemberPIEBALDconsult12-Jan-11 2:28 
GeneralRe: Thoughts PinmemberPranay Rana13-Jan-11 8:55 
GeneralRe: Thoughts PinmemberDstructr17-Jan-11 21:17 

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