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Asp.net Session State Example in C#, VB.NET

Nov 5, 2012
Introduction:

Here I will explain SessionState in
asp.net with example using c# and vb.net.

Description:

In previous posts I explained
ViewState Example in asp.net, Create ContactUs Form, Detect Browser type in jQuery, Scroll to particular link when click on link, send mail with images using gmail in asp.net and many relating articles in asp.net, jQuery. Now I will explain SessionState example in asp.net using c# and vb.net

What is SessionState?

The session state is used to maintain the session of each user throughout the application. Session allows information to be stored in one page and access in another page and support any type of object. In many websites we will see the functionality like once if we login into website they will show username in all the pages for that they will store username in session and they will access that session username in all the pages.

Whenever user enters into website new session id will generate for that user. This session Id will delete when he leave from that application. If he enters again he will get new session Id.

We can check this one with simple example for that create one new website and open Default.aspx page and write the following code

Default.aspx


<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Asp.net Session State Example in C#, VB.NET</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>SessionStateData.aspx</h3>
<table>
<tr>
<td>FirstName:</td><td><asp:TextBox ID="txtfName" runat="server"/></td>
</tr>
<tr>
<td>LastName:</td><td><asp:TextBox ID="txtlName" runat="server"/></td>
</tr>
<tr><td></td><td> <asp:Button ID="btnSubmit" runat="server" Text="Set SessionState Data" OnClick="btnSubmit_Click" /></td></tr>
</table>
</div>
</form>
</body>
</html>
Now add following namespaces in your codebehind

C# Code


using System;

After that write the following code in button click


protected void Page_Load(object sender, EventArgs e)
{

}
// Set Session values during button click
protected void btnSubmit_Click(object sender, EventArgs e)
{
Session["FirstName"] = txtfName.Text;
Session["LastName"] = txtlName.Text;
Response.Redirect("Default2.aspx");
}
VB.NET Code


Partial Class SessionStateExample
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

End Sub
' Set Session values during button click
Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As EventArgs)
Session("FirstName") = txtfName.Text
Session("LastName") = txtlName.Text
Response.Redirect("Default2.aspx")
End Sub

End Class
Now Right click on your website à select add new item à Select Web Form à Give name as Default2.aspx

Open Default2.aspx page and write the following code

Default2.aspx


<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>Default2.aspx</h3>
<table>
<tr>
<td colspan="2">Welcome <b><asp:Label ID="lblString" runat="server"/></b></td>
</tr>
<tr>
<td>Your FirstName: </td><td><b><asp:Label ID="lblfName" runat="server"/></b></td>
</tr>
<tr>
<td>Your LastName </td><td><b><asp:Label ID="lbllName" runat="server"/></b></td>
</tr>
<tr><td></td><td> </td></tr>
</table>
</div>
</form>
</body>
</html>
Now add following namespaces in your codebehind

C# Code


using System;

After that write the following code in button click


protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
if (Session["FirstName"] == null && Session["LastName"]==null)
{
Session["FirstName"] = "Aspdotnet";
Session["LastName"] = "  Suresh";
lblString.Text = "Welcome " + Session["FirstName"] + Session["LastName"];
}
else
{
lblString.Text = Session["FirstName"]+" " + Session["LastName"];
lblfName.Text = Session["FirstName"].ToString();
lbllName.Text = Session["LastName"].ToString();
}
}
}
VB.NET Code


Partial Class Default2
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
If Not IsPostBack Then
If Session("FirstName") Is Nothing AndAlso Session("LastName") Is Nothing Then
Session("FirstName") = "Aspdotnet"
Session("LastName") = "  Suresh"
lblString.Text = "Welcome " & Convert.ToString(Session("FirstName")) & Convert.ToString(Session("LastName"))
Else
lblString.Text = Convert.ToString(Session("FirstName")) & " " & Convert.ToString(Session("LastName"))
lblfName.Text = Session("FirstName").ToString()
lbllName.Text = Session("LastName").ToString()
End If
End If
End Sub
End Class
Demo


Download Sample Code Attached

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20 comments :

nivedita dalvi said...

Sir pls tell me how to estblish LAN based Connectivity with using web services...pls reply sir....This demo is implemented in the desktop application in C#....pls reply...

ANIL BABU Mandla said...

Thank you,I am running the project immoderately asking userid and pwd i am enter the details its checking backed database it's correct disply that corresponding some another page,it's wrong display error msg.

My question is ia m running the first time asking login details ok,I am running second time not asking again login details automatically display that corresponding page,
can you give me one simple example on this plz help me what concept is involved to do this?????

Ghandour said...

nice work plz need example about how to prevent session time out :)

Anonymous said...

Thank you....It was very useful.

Anonymous said...

nice e.g.

THILLAI RAJA said...

thanku

Anonymous said...

oyeee teri bhes ki aakh oyeeeeeeeeeeeeeeee.......

ලහිරු said...

Great!

Anonymous said...

thanks

Tarun said...

Good One.

Indrajeet Indru said...

Thank u!

Anonymous said...

So nice of you. but you should reply to any queries if asked by the users.

Anonymous said...

easy to understand.....good work man!!!

Sujith Ram said...

Sir,I have a small doubt,if we place a Hyperlink in Default2.aspx page and if we click it we will be redirected to another page.then will that session will continue?? if so if user knows the name of that Page ex: Default3.aspx the he can directly access that page then how to fix it......I am new to ASP.NET help me

Anonymous said...

session will lost

Anonymous said...

I am facing Similar Issue. Could you please provide an alternative link for your solution as I am unable to reach your solution? its showing as the site is temporarily down.

prakash bari said...

can we store the grid view data in session???
the above example is weal but please provide the alternative for this solution

dilip kumar said...

wow suresh u build amaging t

Anonymous said...

its simple which he explained. What about sessions types ,,Not Given Complete Clarity

mohd a said...

how to retrieve session value on all the pages of the application...suppose i have 50 pages and i have to take the session value to all the 50 pages then how how can i implement it,,,

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